From 8edec81b11191c4c91ab02637451c0c68ba4c42c Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Wed, 27 May 2020 23:20:54 +0200
Subject: [PATCH 01/14] Switch from pipenv to poetry

- dropped dev dependency on rope, isort & flake
- poetry doesn't support dev scripts like pipenv, so create a makefile instead
- Add pytest-cov
- Use tox for testing multiple python versions in CI
- Update README

Update ci workflow
---
 .github/workflows/ci.yml         |  44 +-
 .gitignore                       |   5 +-
 Makefile                         |  43 ++
 Pipfile                          |  32 --
 Pipfile.lock                     | 444 -----------------
 README.md                        |  31 +-
 betterproto/tests/generate.py    |   0
 betterproto/tests/test_inputs.py |   2 +-
 poetry.lock                      | 803 +++++++++++++++++++++++++++++++
 pyproject.toml                   |  61 ++-
 setup.py                         |  29 --
 11 files changed, 939 insertions(+), 555 deletions(-)
 create mode 100644 Makefile
 delete mode 100644 Pipfile
 delete mode 100644 Pipfile.lock
 mode change 100644 => 100755 betterproto/tests/generate.py
 create mode 100644 poetry.lock
 delete mode 100644 setup.py

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cbf069d..30da576 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,39 +14,29 @@ jobs:
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
-      - uses: dschep/install-pipenv-action@v1
+      - uses: Gr1N/setup-poetry@v2
       - name: Install dependencies
-        run: |
-          pipenv install --dev --python ${pythonLocation}/python
+        run: make setup
       - name: Run black
-        run: |
-          pipenv run black . --check --diff --exclude tests/output_
+        run: make check-style
 
   run-tests:
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        python-version: [ '3.6', '3.7' ]
-
-    name: Python ${{ matrix.python-version }} test
+    name: Run tests with tox
 
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1
         with:
-          python-version: ${{ matrix.python-version }}
-      - uses: dschep/install-pipenv-action@v1
+          python-version: 3.7
+      - uses: Gr1N/setup-poetry@v2
       - name: Install dependencies
         run: |
           sudo apt install protobuf-compiler libprotobuf-dev
-          pipenv install --dev --python ${pythonLocation}/python
+          make setup
       - name: Run tests
-        run: |
-          cp .env.default .env
-          pipenv run pip install -e .
-          pipenv run generate
-          pipenv run test
+        run: make full-test
 
   build-release:
     runs-on: ubuntu-latest
@@ -56,17 +46,11 @@ jobs:
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
-      - uses: dschep/install-pipenv-action@v1
-      - name: Install dependencies
-        run: |
-          sudo apt install protobuf-compiler libprotobuf-dev
-          pipenv install --dev --python ${pythonLocation}/python
+      - uses: Gr1N/setup-poetry@v2
       - name: Build package
+        run: poetry build
+      - name: Publish package to PyPI
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        run: pipenv run python setup.py sdist
-      - name: Publish package
-        if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        uses: pypa/gh-action-pypi-publish@v1.0.0a0
-        with:
-          user: __token__
-          password: ${{ secrets.pypi }}
+        run: poetry publish -n
+        env:
+          POETRY_PYPI_TOKEN_PYPI: ${{ secrets.pypi }}
diff --git a/.gitignore b/.gitignore
index dd22728..6b9e7f0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+.coverage
+.DS_Store
 .env
 .vscode/settings.json
 .mypy_cache
@@ -9,4 +11,5 @@ betterproto/tests/output_*
 dist
 **/*.egg-info
 output
-.idea
\ No newline at end of file
+.idea
+.tox
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..b4c99a9
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,43 @@
+help:               ##	- Show this help.
+	@fgrep -h "##" $(MAKEFILE_LIST) | fgrep -v fgrep | sed -e 's/\\$$//' | sed -e 's/##//'
+
+# Dev workflow tasks
+
+setup:              ##	- Setup the virtualenv with poetry
+	poetry install -E compiler
+
+generate:           ##	- Generate test cases (do this once before running test)
+	poetry run ./betterproto/tests/generate.py
+
+test:               ##	- Run tests
+	poetry run pytest --cov betterproto
+
+types:              ##	- Check types with mypy
+	poetry run mypy betterproto --ignore-missing-imports
+
+format:             ##	- Apply black formatting to source code
+	poetry run black . --exclude tests/output_
+
+clean:						  ## - Clean out generated files from the workspace
+	rm -rf .coverage \
+	       .mypy_cache \
+	       .pytest_cache \
+	       dist \
+	       **/__pycache__ \
+	       betterproto/tests/output_*
+
+# Manual testing
+
+# By default write plugin output to a directory called output
+o=output
+plugin:             ##	- Execute the protoc plugin, with output writte to `output` or the value passed to `-o`
+	mkdir -p $(o)
+	protoc --plugin=protoc-gen-custom=betterproto/plugin.py $(i) --custom_out=$(o)
+
+# CI tasks
+
+full-test: generate ##	- Run full testing sequence
+	poetry run tox
+
+check-style:        ##	- Check if code style is correct
+	poetry run black . --check --diff --exclude tests/output_
diff --git a/Pipfile b/Pipfile
deleted file mode 100644
index 0e9397c..0000000
--- a/Pipfile
+++ /dev/null
@@ -1,32 +0,0 @@
-[[source]]
-name = "pypi"
-url = "https://pypi.org/simple"
-verify_ssl = true
-
-[dev-packages]
-flake8 = "*"
-mypy = "*"
-isort = "*"
-pytest = "*"
-pytest-asyncio = "*"
-rope = "*"
-
-[packages]
-protobuf = "*"
-jinja2 = "*"
-grpclib = "*"
-stringcase = "*"
-black = "*"
-backports-datetime-fromisoformat = "*"
-dataclasses = "*"
-
-[requires]
-python_version = "3.6"
-
-[scripts]
-plugin = "protoc --plugin=protoc-gen-custom=betterproto/plugin.py --custom_out=output"
-generate = "python betterproto/tests/generate.py"
-test = "pytest ./betterproto/tests"
-
-[pipenv]
-allow_prereleases = true
diff --git a/Pipfile.lock b/Pipfile.lock
deleted file mode 100644
index af70998..0000000
--- a/Pipfile.lock
+++ /dev/null
@@ -1,444 +0,0 @@
-{
-    "_meta": {
-        "hash": {
-            "sha256": "44ae793965dc2b6ec17f0435a388846248b8a703cf857470b66af84227535950"
-        },
-        "pipfile-spec": 6,
-        "requires": {
-            "python_version": "3.6"
-        },
-        "sources": [
-            {
-                "name": "pypi",
-                "url": "https://pypi.org/simple",
-                "verify_ssl": true
-            }
-        ]
-    },
-    "default": {
-        "appdirs": {
-            "hashes": [
-                "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41",
-                "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"
-            ],
-            "version": "==1.4.4"
-        },
-        "attrs": {
-            "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
-            ],
-            "version": "==19.3.0"
-        },
-        "backports-datetime-fromisoformat": {
-            "hashes": [
-                "sha256:9577a2a9486cd7383a5f58b23bb8e81cf0821dbbc0eb7c87d3fa198c1df40f5c"
-            ],
-            "index": "pypi",
-            "version": "==1.0.0"
-        },
-        "black": {
-            "hashes": [
-                "sha256:1b30e59be925fafc1ee4565e5e08abef6b03fe455102883820fe5ee2e4734e0b",
-                "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"
-            ],
-            "index": "pypi",
-            "version": "==19.10b0"
-        },
-        "click": {
-            "hashes": [
-                "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a",
-                "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"
-            ],
-            "version": "==7.1.2"
-        },
-        "dataclasses": {
-            "hashes": [
-                "sha256:454a69d788c7fda44efd71e259be79577822f5e3f53f029a22d08004e951dc9f",
-                "sha256:6988bd2b895eef432d562370bb707d540f32f7360ab13da45340101bc2307d84"
-            ],
-            "index": "pypi",
-            "version": "==0.6"
-        },
-        "grpclib": {
-            "hashes": [
-                "sha256:b27d56c987b89023d5640fe9668943e49b46703fc85d8182a58c9f3b19120cdc"
-            ],
-            "index": "pypi",
-            "version": "==0.3.2rc1"
-        },
-        "h2": {
-            "hashes": [
-                "sha256:61e0f6601fa709f35cdb730863b4e5ec7ad449792add80d1410d4174ed139af5",
-                "sha256:875f41ebd6f2c44781259005b157faed1a5031df3ae5aa7bcb4628a6c0782f14"
-            ],
-            "version": "==3.2.0"
-        },
-        "hpack": {
-            "hashes": [
-                "sha256:0edd79eda27a53ba5be2dfabf3b15780928a0dff6eb0c60a3d6767720e970c89",
-                "sha256:8eec9c1f4bfae3408a3f30500261f7e6a65912dc138526ea054f9ad98892e9d2"
-            ],
-            "version": "==3.0.0"
-        },
-        "hyperframe": {
-            "hashes": [
-                "sha256:5187962cb16dcc078f23cb5a4b110098d546c3f41ff2d4038a9896893bbd0b40",
-                "sha256:a9f5c17f2cc3c719b917c4f33ed1c61bd1f8dfac4b1bd23b7c80b3400971b41f"
-            ],
-            "version": "==5.2.0"
-        },
-        "jinja2": {
-            "hashes": [
-                "sha256:c10142f819c2d22bdcd17548c46fa9b77cf4fda45097854c689666bf425e7484",
-                "sha256:c922560ac46888d47384de1dbdc3daaa2ea993af4b26a436dec31fa2c19ec668"
-            ],
-            "index": "pypi",
-            "version": "==3.0.0a1"
-        },
-        "markupsafe": {
-            "hashes": [
-                "sha256:06358015a4dee8ee23ae426bf885616ab3963622defd829eb45b44e3dee3515f",
-                "sha256:0b0c4fc852c5f02c6277ef3b33d23fcbe89b1b227460423e3335374da046b6db",
-                "sha256:267677fc42afed5094fc5ea1c4236bbe4b6a00fe4b08e93451e65ae9048139c7",
-                "sha256:303cb70893e2c345588fb5d5b86e0ca369f9bb56942f03064c5e3e75fa7a238a",
-                "sha256:3c9b624a0d9ed5a5093ac4edc4e823e6b125441e60ef35d36e6f4a6fdacd5054",
-                "sha256:42033e14cae1f6c86fc0c3e90d04d08ce73ac8e46ba420a0d22d545c2abd4977",
-                "sha256:4e4a99b6af7bdc0856b50020c095848ec050356a001e1f751510aef6ab14d0e0",
-                "sha256:4eb07faad54bb07427d848f31030a65a49ebb0cec0b30674f91cf1ddd456bfe4",
-                "sha256:63a7161cd8c2bc563feeda45df62f42c860dd0675e2b8da2667f25bb3c95eaba",
-                "sha256:68e0fd039b68d2945b4beb947d4023ca7f8e95b708031c345762efba214ea761",
-                "sha256:8092a63397025c2f655acd42784b2a1528339b90b987beb9253f22e8cdbb36c3",
-                "sha256:841218860683c0f2223e24756843d84cc49cccdae6765e04962607754a52d3e0",
-                "sha256:94076b2314bd2f6cfae508ad65b4d493e3a58a50112b7a2cbb6287bdbc404ae8",
-                "sha256:9d22aff1c5322e402adfb3ce40839a5056c353e711c033798cf4f02eb9f5124d",
-                "sha256:b0e4584f62b3e5f5c1a7bcefd2b52f236505e6ef032cc508caa4f4c8dc8d3af1",
-                "sha256:b1163ffc1384d242964426a8164da12dbcdbc0de18ea36e2c34b898ed38c3b45",
-                "sha256:beac28ed60c8e838301226a7a85841d0af2068eba2dcb1a58c2d32d6c05e440e",
-                "sha256:c29f096ce79c03054a1101d6e5fe6bf04b0bb489165d5e0e9653fb4fe8048ee1",
-                "sha256:c58779966d53e5f14ba393d64e2402a7926601d1ac8adeb4e83893def79d0428",
-                "sha256:cfe14b37908eaf7d5506302987228bff69e1b8e7071ccd4e70fd0283b1b47f0b",
-                "sha256:e834249c45aa9837d0753351cdca61a4b8b383cc9ad0ff2325c97ff7b69e72a6",
-                "sha256:eed1b234c4499811ee85bcefa22ef5e466e75d132502226ed29740d593316c1f"
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-            "version": "==2.0.0a1"
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-        "multidict": {
-            "hashes": [
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-                "sha256:c026fe9a05130e44157b98fea3ab12969e5b60691a276150db9eda71710cd10b",
-                "sha256:d14842362ed4cf63751648e7672f7174c9818459d169231d03c56e84daf90b7c",
-                "sha256:e0d072ae0f2a179c375f67e3da300b47e1a83293c554450b29c900e50afaae87",
-                "sha256:f07acae137b71af3bb548bd8da720956a3bc9f9a0b87733e0899226a2317aeb7",
-                "sha256:fbb77a75e529021e7c4a8d4e823d88ef4d23674a202be4f5addffc72cbb91430",
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-                "sha256:9b1462c033a2cee7f4e8eb396905c69de2c532c3b835ff8f71f8e5fb77c38023",
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-            "index": "pypi",
-            "version": "==3.12.1"
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-                "sha256:c2062c7d470751b648f1cacc3f54460aebfc261285f14bc6da49c6943bd48bdd",
-                "sha256:c9bce6e006fbe771a02bda468ec40ffccbf954803b470a0345ad39c603402577",
-                "sha256:ce367d21f33e23a84fb83a641b3834dd7dd8e9318ad8ff677fbfae5915a239f7",
-                "sha256:ce450ffbfec93821ab1fea94779a8440e10cf63819be6e176eb1973a6017aff5",
-                "sha256:ce5cc53aa9fbbf6712e92c7cf268274eaff30f6bd12a0754e8133d85a8fb0f5f",
-                "sha256:d466967ac8e45244b9dfe302bbe5e3337f8dc4dec8d7d10f5e950d83b140d33a",
-                "sha256:d881c2e657c51d89f02ae4c21d9adbef76b8325fe4d5cf0e9ad62f850f3a98fd",
-                "sha256:e565569fc28e3ba3e475ec344d87ed3cd8ba2d575335359749298a0899fe122e",
-                "sha256:ea55b80eb0d1c3f1d8d784264a6764f931e172480a2f1868f2536444c5f01e01"
-            ],
-            "version": "==2020.5.14"
-        },
-        "six": {
-            "hashes": [
-                "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
-                "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
-            ],
-            "version": "==1.15.0"
-        },
-        "stringcase": {
-            "hashes": [
-                "sha256:48a06980661908efe8d9d34eab2b6c13aefa2163b3ced26972902e3bdfd87008"
-            ],
-            "index": "pypi",
-            "version": "==1.2.0"
-        },
-        "toml": {
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-                "sha256:c9e348e02e4d2b4a8b2eedb48210430658df6951fa484e59de33ff773fbd4b41",
-                "sha256:d205b1b46085271b4e15f670058ce182bd1199e56b317bf2ec004b6a44f911f6",
-                "sha256:d43943ef777f9a1c42bf4e552ba23ac77a6351de620aa9acf64ad54933ad4d34",
-                "sha256:d5d33e9e7af3b34a40dc05f498939f0ebf187f07c385fd58d591c533ad8562fe",
-                "sha256:fc0fea399acb12edbf8a628ba8d2312f583bdbdb3335635db062fa98cf71fca4",
-                "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"
-            ],
-            "version": "==1.4.1"
-        }
-    },
-    "develop": {
-        "attrs": {
-            "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
-            ],
-            "version": "==19.3.0"
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-        "flake8": {
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-                "sha256:ccaa799ef9893cebe69fdfefed76865aeaefbb94cb8545617b2298786a4de9a5"
-            ],
-            "index": "pypi",
-            "version": "==3.8.2"
-        },
-        "importlib-metadata": {
-            "hashes": [
-                "sha256:2a688cbaa90e0cc587f1df48bdc97a6eadccdcd9c35fb3f976a09e3b5016d90f",
-                "sha256:34513a8a0c4962bc66d35b359558fd8a5e10cd472d37aec5f66858addef32c1e"
-            ],
-            "markers": "python_version < '3.8'",
-            "version": "==1.6.0"
-        },
-        "isort": {
-            "hashes": [
-                "sha256:54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1",
-                "sha256:6e811fcb295968434526407adb8796944f1988c5b65e8139058f2014cbe100fd"
-            ],
-            "index": "pypi",
-            "version": "==4.3.21"
-        },
-        "mccabe": {
-            "hashes": [
-                "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
-                "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"
-            ],
-            "version": "==0.6.1"
-        },
-        "more-itertools": {
-            "hashes": [
-                "sha256:558bb897a2232f5e4f8e2399089e35aecb746e1f9191b6584a151647e89267be",
-                "sha256:7818f596b1e87be009031c7653d01acc46ed422e6656b394b0f765ce66ed4982"
-            ],
-            "version": "==8.3.0"
-        },
-        "mypy": {
-            "hashes": [
-                "sha256:15b948e1302682e3682f11f50208b726a246ab4e6c1b39f9264a8796bb416aa2",
-                "sha256:219a3116ecd015f8dca7b5d2c366c973509dfb9a8fc97ef044a36e3da66144a1",
-                "sha256:3b1fc683fb204c6b4403a1ef23f0b1fac8e4477091585e0c8c54cbdf7d7bb164",
-                "sha256:3beff56b453b6ef94ecb2996bea101a08f1f8a9771d3cbf4988a61e4d9973761",
-                "sha256:7687f6455ec3ed7649d1ae574136835a4272b65b3ddcf01ab8704ac65616c5ce",
-                "sha256:7ec45a70d40ede1ec7ad7f95b3c94c9cf4c186a32f6bacb1795b60abd2f9ef27",
-                "sha256:86c857510a9b7c3104cf4cde1568f4921762c8f9842e987bc03ed4f160925754",
-                "sha256:8a627507ef9b307b46a1fea9513d5c98680ba09591253082b4c48697ba05a4ae",
-                "sha256:8dfb69fbf9f3aeed18afffb15e319ca7f8da9642336348ddd6cab2713ddcf8f9",
-                "sha256:a34b577cdf6313bf24755f7a0e3f3c326d5c1f4fe7422d1d06498eb25ad0c600",
-                "sha256:a8ffcd53cb5dfc131850851cc09f1c44689c2812d0beb954d8138d4f5fc17f65",
-                "sha256:b90928f2d9eb2f33162405f32dde9f6dcead63a0971ca8a1b50eb4ca3e35ceb8",
-                "sha256:c56ffe22faa2e51054c5f7a3bc70a370939c2ed4de308c690e7949230c995913",
-                "sha256:f91c7ae919bbc3f96cd5e5b2e786b2b108343d1d7972ea130f7de27fdd547cf3"
-            ],
-            "index": "pypi",
-            "version": "==0.770"
-        },
-        "mypy-extensions": {
-            "hashes": [
-                "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d",
-                "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"
-            ],
-            "version": "==0.4.3"
-        },
-        "packaging": {
-            "hashes": [
-                "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8",
-                "sha256:998416ba6962ae7fbd6596850b80e17859a5753ba17c32284f67bfff33784181"
-            ],
-            "version": "==20.4"
-        },
-        "pluggy": {
-            "hashes": [
-                "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
-                "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
-            ],
-            "version": "==0.13.1"
-        },
-        "py": {
-            "hashes": [
-                "sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa",
-                "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"
-            ],
-            "version": "==1.8.1"
-        },
-        "pycodestyle": {
-            "hashes": [
-                "sha256:2295e7b2f6b5bd100585ebcb1f616591b652db8a741695b3d8f5d28bdc934367",
-                "sha256:c58a7d2815e0e8d7972bf1803331fb0152f867bd89adf8a01dfd55085434192e"
-            ],
-            "version": "==2.6.0"
-        },
-        "pyflakes": {
-            "hashes": [
-                "sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92",
-                "sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8"
-            ],
-            "version": "==2.2.0"
-        },
-        "pyparsing": {
-            "hashes": [
-                "sha256:67199f0c41a9c702154efb0e7a8cc08accf830eb003b4d9fa42c4059002e2492",
-                "sha256:700d17888d441604b0bd51535908dcb297561b040819cccde647a92439db5a2a"
-            ],
-            "version": "==3.0.0a1"
-        },
-        "pytest": {
-            "hashes": [
-                "sha256:95c710d0a72d91c13fae35dce195633c929c3792f54125919847fdcdf7caa0d3",
-                "sha256:eb2b5e935f6a019317e455b6da83dd8650ac9ffd2ee73a7b657a30873d67a698"
-            ],
-            "index": "pypi",
-            "version": "==5.4.2"
-        },
-        "pytest-asyncio": {
-            "hashes": [
-                "sha256:475bd2f3dc0bc11d2463656b3cbaafdbec5a47b47508ea0b329ee693040eebd2"
-            ],
-            "index": "pypi",
-            "version": "==0.12.0"
-        },
-        "rope": {
-            "hashes": [
-                "sha256:658ad6705f43dcf3d6df379da9486529cf30e02d9ea14c5682aa80eb33b649e1"
-            ],
-            "index": "pypi",
-            "version": "==0.17.0"
-        },
-        "six": {
-            "hashes": [
-                "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
-                "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
-            ],
-            "version": "==1.15.0"
-        },
-        "typed-ast": {
-            "hashes": [
-                "sha256:0666aa36131496aed8f7be0410ff974562ab7eeac11ef351def9ea6fa28f6355",
-                "sha256:0c2c07682d61a629b68433afb159376e24e5b2fd4641d35424e462169c0a7919",
-                "sha256:249862707802d40f7f29f6e1aad8d84b5aa9e44552d2cc17384b209f091276aa",
-                "sha256:24995c843eb0ad11a4527b026b4dde3da70e1f2d8806c99b7b4a7cf491612652",
-                "sha256:269151951236b0f9a6f04015a9004084a5ab0d5f19b57de779f908621e7d8b75",
-                "sha256:4083861b0aa07990b619bd7ddc365eb7fa4b817e99cf5f8d9cf21a42780f6e01",
-                "sha256:498b0f36cc7054c1fead3d7fc59d2150f4d5c6c56ba7fb150c013fbc683a8d2d",
-                "sha256:4e3e5da80ccbebfff202a67bf900d081906c358ccc3d5e3c8aea42fdfdfd51c1",
-                "sha256:6daac9731f172c2a22ade6ed0c00197ee7cc1221aa84cfdf9c31defeb059a907",
-                "sha256:715ff2f2df46121071622063fc7543d9b1fd19ebfc4f5c8895af64a77a8c852c",
-                "sha256:73d785a950fc82dd2a25897d525d003f6378d1cb23ab305578394694202a58c3",
-                "sha256:8c8aaad94455178e3187ab22c8b01a3837f8ee50e09cf31f1ba129eb293ec30b",
-                "sha256:8ce678dbaf790dbdb3eba24056d5364fb45944f33553dd5869b7580cdbb83614",
-                "sha256:aaee9905aee35ba5905cfb3c62f3e83b3bec7b39413f0a7f19be4e547ea01ebb",
-                "sha256:bcd3b13b56ea479b3650b82cabd6b5343a625b0ced5429e4ccad28a8973f301b",
-                "sha256:c9e348e02e4d2b4a8b2eedb48210430658df6951fa484e59de33ff773fbd4b41",
-                "sha256:d205b1b46085271b4e15f670058ce182bd1199e56b317bf2ec004b6a44f911f6",
-                "sha256:d43943ef777f9a1c42bf4e552ba23ac77a6351de620aa9acf64ad54933ad4d34",
-                "sha256:d5d33e9e7af3b34a40dc05f498939f0ebf187f07c385fd58d591c533ad8562fe",
-                "sha256:fc0fea399acb12edbf8a628ba8d2312f583bdbdb3335635db062fa98cf71fca4",
-                "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"
-            ],
-            "version": "==1.4.1"
-        },
-        "typing-extensions": {
-            "hashes": [
-                "sha256:6e95524d8a547a91e08f404ae485bbb71962de46967e1b71a0cb89af24e761c5",
-                "sha256:79ee589a3caca649a9bfd2a8de4709837400dfa00b6cc81962a1e6a1815969ae",
-                "sha256:f8d2bd89d25bc39dabe7d23df520442fa1d8969b82544370e03d88b5a591c392"
-            ],
-            "version": "==3.7.4.2"
-        },
-        "wcwidth": {
-            "hashes": [
-                "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1",
-                "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"
-            ],
-            "version": "==0.1.9"
-        },
-        "zipp": {
-            "hashes": [
-                "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b",
-                "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"
-            ],
-            "version": "==3.1.0"
-        }
-    }
-}
diff --git a/README.md b/README.md
index c8535e8..8f4d2da 100644
--- a/README.md
+++ b/README.md
@@ -46,10 +46,10 @@ First, install the package. Note that the `[compiler]` feature flag tells it to
 
 ```sh
 # Install both the library and compiler
-$ pip install "betterproto[compiler]"
+pip install "betterproto[compiler]"
 
 # Install just the library (to use the generated code output)
-$ pip install betterproto
+pip install betterproto
 ```
 
 Now, given you installed the compiler and have a proto file, e.g `example.proto`:
@@ -68,7 +68,7 @@ message Greeting {
 You can run the following:
 
 ```sh
-$ protoc -I . --python_betterproto_out=. example.proto
+protoc -I . --python_betterproto_out=. example.proto
 ```
 
 This will generate `hello.py` which looks like:
@@ -299,25 +299,26 @@ datetime.datetime(2019, 1, 1, 11, 59, 58, 800000, tzinfo=datetime.timezone.utc)
 
 Join us on [Slack](https://join.slack.com/t/betterproto/shared_invite/zt-f0n0uolx-iN8gBNrkPxtKHTLpG3o1OQ)!
 
-First, make sure you have Python 3.6+ and `pipenv` installed, along with the official [Protobuf Compiler](https://github.com/protocolbuffers/protobuf/releases) for your platform. Then:
+First, make sure you have Python 3.6+ and `poetry` installed, along with the official [Protobuf Compiler](https://github.com/protocolbuffers/protobuf/releases) for your platform. Then:
 
 ```sh
 # Get set up with the virtual env & dependencies
-$ pipenv install --dev
+poetry install
 
-# Link the local package
-$ pipenv shell
-$ pip install -e .
+# Activate the poetry environment
+poetry shell
 ```
 
+To benefit from the collection of standard development tasks ensure you have make installed and run `make help` to see available tasks.
+
 ### Code style
 
 This project enforces [black](https://github.com/psf/black) python code formatting.
 
 Before commiting changes run:
 
-```bash
-pipenv run black .
+```sh
+make format
 ```
 
 To avoid merge conflicts later, non-black formatted python code will fail in CI.
@@ -351,10 +352,16 @@ Here's how to run the tests.
 
 ```sh
 # Generate assets from sample .proto files
-$ pipenv run generate
+make generate
 
 # Run all tests
-$ pipenv run test
+make test
+```
+
+To run tests as they are run in CI (with tox) run:
+
+```sh
+make full-test
 ```
 
 ### (Re)compiling Google Well-known Types
diff --git a/betterproto/tests/generate.py b/betterproto/tests/generate.py
old mode 100644
new mode 100755
diff --git a/betterproto/tests/test_inputs.py b/betterproto/tests/test_inputs.py
index cac8327..7de1c69 100644
--- a/betterproto/tests/test_inputs.py
+++ b/betterproto/tests/test_inputs.py
@@ -25,7 +25,7 @@ class TestCases:
     def __init__(self, path, services: Set[str], xfail: Set[str]):
         _all = set(get_directories(path))
         _services = services
-        _messages = _all - services
+        _messages = (_all - services) - {"__pycache__"}
         _messages_with_json = {
             test for test in _messages if get_test_case_json_data(test)
         }
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..25fc2dd
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,803 @@
+[[package]]
+category = "main"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+name = "appdirs"
+optional = false
+python-versions = "*"
+version = "1.4.4"
+
+[[package]]
+category = "dev"
+description = "Atomic file writes."
+marker = "sys_platform == \"win32\""
+name = "atomicwrites"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.4.0"
+
+[[package]]
+category = "main"
+description = "Classes Without Boilerplate"
+name = "attrs"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "19.3.0"
+
+[package.extras]
+azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
+dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
+docs = ["sphinx", "zope.interface"]
+tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+
+[[package]]
+category = "main"
+description = "Backport of Python 3.7's datetime.fromisoformat"
+marker = "python_version < \"3.7\""
+name = "backports-datetime-fromisoformat"
+optional = false
+python-versions = "*"
+version = "1.0.0"
+
+[[package]]
+category = "main"
+description = "The uncompromising code formatter."
+name = "black"
+optional = true
+python-versions = ">=3.6"
+version = "19.10b0"
+
+[package.dependencies]
+appdirs = "*"
+attrs = ">=18.1.0"
+click = ">=6.5"
+pathspec = ">=0.6,<1"
+regex = "*"
+toml = ">=0.9.4"
+typed-ast = ">=1.4.0"
+
+[package.extras]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
+[[package]]
+category = "main"
+description = "Composable command line interface toolkit"
+name = "click"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "7.1.2"
+
+[[package]]
+category = "dev"
+description = "Cross-platform colored terminal text."
+marker = "sys_platform == \"win32\" or platform_system == \"Windows\""
+name = "colorama"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.4.3"
+
+[[package]]
+category = "dev"
+description = "Code coverage measurement for Python"
+name = "coverage"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+version = "5.1"
+
+[package.extras]
+toml = ["toml"]
+
+[[package]]
+category = "main"
+description = "A backport of the dataclasses module for Python 3.6"
+marker = "python_version >= \"3.6\" and python_version < \"3.7\""
+name = "dataclasses"
+optional = false
+python-versions = ">=3.6, <3.7"
+version = "0.7"
+
+[[package]]
+category = "dev"
+description = "Distribution utilities"
+name = "distlib"
+optional = false
+python-versions = "*"
+version = "0.3.0"
+
+[[package]]
+category = "dev"
+description = "A platform independent file lock."
+name = "filelock"
+optional = false
+python-versions = "*"
+version = "3.0.12"
+
+[[package]]
+category = "main"
+description = "Pure-Python gRPC implementation for asyncio"
+name = "grpclib"
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+]
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+    {file = "wcwidth-0.1.9.tar.gz", hash = "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"},
+]
+zipp = [
+    {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
+    {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index 1c8a595..25a4327 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,9 +1,58 @@
+[tool.poetry]
+name = "betterproto"
+version = "1.2.5"
+description = "A better Protobuf / gRPC generator & library"
+authors = ["Daniel G. Taylor <danielgtaylor@gmail.com>"]
+readme = "README.md"
+repository = "https://github.com/danielgtaylor/python-betterproto"
+keywords = ["protobuf", "gRPC"]
+license = "MIT"
+
+exclude = ["betterproto/tests"]
+
+[tool.poetry.dependencies]
+python = "^3.6"
+backports-datetime-fromisoformat = { version = "^1.0.0", python = "<3.7" }
+black = { version = "^19.10b0", optional = true }
+dataclasses = { version = "^0.7", python = ">=3.6, <3.7" }
+grpclib = "^0.3.1"
+jinja2 = { version = "^2.11.2", optional = true }
+protobuf = { version = "^3.12.2", optional = true }
+stringcase = "^1.2.0"
+
+[tool.poetry.dev-dependencies]
+mypy = "^0.770"
+pytest = "^5.4.2"
+pytest-asyncio = "^0.12.0"
+pytest-cov = "^2.9.0"
+tox = "^3.15.1"
+
+[tool.poetry.scripts]
+protoc-gen-python_betterproto = "betterproto.plugin:main"
+
+[tool.poetry.extras]
+compiler = ["black", "jinja2", "protobuf"]
+
 [tool.black]
 target-version = ['py36']
 
-[tool.isort]
-multi_line_output = 3
-include_trailing_comma = true
-force_grid_wrap = 0
-use_parentheses = true
-line_length = 88
+[tool.coverage.run]
+omit = ["betterproto/tests/*"]
+
+[tool.tox]
+legacy_tox_ini = """
+[tox]
+isolated_build = true
+envlist = py36, py37
+
+[testenv]
+whitelist_externals = poetry
+commands =
+    poetry install -v --extras compiler
+    poetry run pytest --cov betterproto
+"""
+
+[build-system]
+requires = ["poetry>=0.12"]
+build-backend = "poetry.masonry.api"
+
diff --git a/setup.py b/setup.py
deleted file mode 100644
index f84623e..0000000
--- a/setup.py
+++ /dev/null
@@ -1,29 +0,0 @@
-from setuptools import setup, find_packages
-
-setup(
-    name="betterproto",
-    version="1.2.5",
-    description="A better Protobuf / gRPC generator & library",
-    long_description=open("README.md", "r", encoding="utf-8").read(),
-    long_description_content_type="text/markdown",
-    url="http://github.com/danielgtaylor/python-betterproto",
-    author="Daniel G. Taylor",
-    author_email="danielgtaylor@gmail.com",
-    license="MIT",
-    entry_points={
-        "console_scripts": ["protoc-gen-python_betterproto=betterproto.plugin:main"]
-    },
-    packages=find_packages(
-        exclude=["tests", "*.tests", "*.tests.*", "output", "output.*"]
-    ),
-    package_data={"betterproto": ["py.typed", "templates/template.py.j2"]},
-    python_requires=">=3.6",
-    install_requires=[
-        'dataclasses; python_version<"3.7"',
-        'backports-datetime-fromisoformat; python_version<"3.7"',
-        "grpclib",
-        "stringcase",
-    ],
-    extras_require={"compiler": ["black", "jinja2", "protobuf"]},
-    zip_safe=False,
-)

From 04dce524aaf0caa919ec7c72cb9da40b1aec6dd1 Mon Sep 17 00:00:00 2001
From: James Lan <jameslan@gmail.com>
Date: Thu, 11 Jun 2020 22:23:45 -0700
Subject: [PATCH 02/14] fixed field types should be int

---
 betterproto/plugin.py                      | 4 ++--
 betterproto/tests/inputs/fixed/fixed.json  | 6 ++++++
 betterproto/tests/inputs/fixed/fixed.proto | 8 ++++++++
 3 files changed, 16 insertions(+), 2 deletions(-)
 create mode 100644 betterproto/tests/inputs/fixed/fixed.json
 create mode 100644 betterproto/tests/inputs/fixed/fixed.proto

diff --git a/betterproto/plugin.py b/betterproto/plugin.py
index c843a6a..c867930 100755
--- a/betterproto/plugin.py
+++ b/betterproto/plugin.py
@@ -103,9 +103,9 @@ def py_type(
     message: DescriptorProto,
     descriptor: FieldDescriptorProto,
 ) -> str:
-    if descriptor.type in [1, 2, 6, 7, 15, 16]:
+    if descriptor.type in [1, 2]:
         return "float"
-    elif descriptor.type in [3, 4, 5, 13, 17, 18]:
+    elif descriptor.type in [3, 4, 5, 6, 7, 13, 15, 16, 17, 18]:
         return "int"
     elif descriptor.type == 8:
         return "bool"
diff --git a/betterproto/tests/inputs/fixed/fixed.json b/betterproto/tests/inputs/fixed/fixed.json
new file mode 100644
index 0000000..8858780
--- /dev/null
+++ b/betterproto/tests/inputs/fixed/fixed.json
@@ -0,0 +1,6 @@
+{
+  "foo": 4294967295,
+  "bar": -2147483648,
+  "baz": "18446744073709551615",
+  "qux": "-9223372036854775808"
+}
diff --git a/betterproto/tests/inputs/fixed/fixed.proto b/betterproto/tests/inputs/fixed/fixed.proto
new file mode 100644
index 0000000..50dad84
--- /dev/null
+++ b/betterproto/tests/inputs/fixed/fixed.proto
@@ -0,0 +1,8 @@
+syntax = "proto3";
+
+message Test {
+  fixed32 foo = 1;
+  sfixed32 bar = 2;
+  fixed64 baz = 3;
+  sfixed64 qux = 4;
+}

From a757da1b293969f148ba512bb7b5392dfb817cb6 Mon Sep 17 00:00:00 2001
From: Hans Lellelid <hans@xmpl.org>
Date: Mon, 11 May 2020 15:30:29 -0400
Subject: [PATCH 03/14] Adding basic support (untested) for client streaming

---
 betterproto/__init__.py              | 38 ++++++++++++++++++++++++
 betterproto/plugin.py                |  5 ++--
 betterproto/templates/template.py.j2 | 44 ++++++++++++++++++++++++++--
 3 files changed, 82 insertions(+), 5 deletions(-)

diff --git a/betterproto/__init__.py b/betterproto/__init__.py
index 5d901be..a2e7a18 100644
--- a/betterproto/__init__.py
+++ b/betterproto/__init__.py
@@ -14,10 +14,12 @@ from typing import (
     Collection,
     Dict,
     Generator,
+    Iterator,
     List,
     Mapping,
     Optional,
     Set,
+    SupportsBytes,
     Tuple,
     Type,
     TypeVar,
@@ -431,6 +433,7 @@ def parse_fields(value: bytes) -> Generator[ParsedField, None, None]:
 
 # Bound type variable to allow methods to return `self` of subclasses
 T = TypeVar("T", bound="Message")
+ST = TypeVar("ST", bound="IProtoMessage")
 
 
 class ProtoClassMetadata:
@@ -1104,3 +1107,38 @@ class ServiceStub(ABC):
             await stream.send_message(request, end=True)
             async for message in stream:
                 yield message
+
+    async def _stream_unary(
+        self,
+        route: str,
+        request_iterator: Iterator["IProtoMessage"],
+        request_type: Type[ST],
+        response_type: Type[T],
+    ) -> T:
+        """Make a stream request and return the response."""
+        async with self.channel.request(
+            route, grpclib.const.Cardinality.STREAM_UNARY, request_type, response_type
+        ) as stream:
+            for message in request_iterator:
+                await stream.send_message(message)
+            await stream.send_request(end=True)
+            response = await stream.recv_message()
+            assert response is not None
+            return response
+
+    async def _stream_stream(
+        self,
+        route: str,
+        request_iterator: Iterator["IProtoMessage"],
+        request_type: Type[ST],
+        response_type: Type[T],
+    ) -> AsyncGenerator[T, None]:
+        """Make a stream request and return the stream response iterator."""
+        async with self.channel.request(
+            route, grpclib.const.Cardinality.STREAM_STREAM, request_type, response_type
+        ) as stream:
+            for message in request_iterator:
+                await stream.send_message(message)
+            await stream.send_request(end=True)
+            async for message in stream:
+                yield message
diff --git a/betterproto/plugin.py b/betterproto/plugin.py
index e300318..b877ce6 100755
--- a/betterproto/plugin.py
+++ b/betterproto/plugin.py
@@ -311,8 +311,6 @@ def generate_code(request, response):
                 }
 
                 for j, method in enumerate(service.method):
-                    if method.client_streaming:
-                        raise NotImplementedError("Client streaming not yet supported")
 
                     input_message = None
                     input_type = get_ref_type(
@@ -350,6 +348,9 @@ def generate_code(request, response):
                     if method.server_streaming:
                         output["typing_imports"].add("AsyncGenerator")
 
+                    if method.client_streaming:
+                        output["typing_imports"].add("Iterator")
+
                 output["services"].append(data)
 
         output["imports"] = sorted(output["imports"])
diff --git a/betterproto/templates/template.py.j2 b/betterproto/templates/template.py.j2
index 3a19422..c4c3029 100644
--- a/betterproto/templates/template.py.j2
+++ b/betterproto/templates/template.py.j2
@@ -63,11 +63,28 @@ class {{ service.py_name }}Stub(betterproto.ServiceStub):
 
     {% endif %}
     {% for method in service.methods %}
-    async def {{ method.py_name }}(self{% if method.input_message and method.input_message.properties %}, *, {% for field in method.input_message.properties %}{{ field.py_name }}: {% if field.zero == "None" and not field.type.startswith("Optional[") %}Optional[{{ field.type }}]{% else %}{{ field.type }}{% endif %} = {{ field.zero }}{% if not loop.last %}, {% endif %}{% endfor %}{% endif %}) -> {% if method.server_streaming %}AsyncGenerator[{{ method.output }}, None]{% else %}{{ method.output }}{% endif %}:
+    async def {{ method.py_name }}(self
+        {%- if not method.client_streaming -%}
+            {%- if method.input_message and method.input_message.properties -%}, *,
+                {%- for field in method.input_message.properties -%}
+                    {{ field.py_name }}: {% if field.zero == "None" and not field.type.startswith("Optional[") -%}
+                                            Optional[{{ field.type }}]
+                                         {%- else -%}
+                                            {{ field.type }}
+                                         {%- endif -%} = {{ field.zero }}
+                    {%- if not loop.last %}, {% endif -%}
+                {%- endfor -%}
+            {%- endif -%}
+        {%- else -%}
+            {# Client streaming: need a request iterator instead #}
+            , request_iterator: Iterator["{{ method.input }}"]
+        {%- endif -%}
+            ) -> {% if method.server_streaming %}AsyncGenerator[{{ method.output }}, None]{% else %}{{ method.output }}{% endif %}:
         {% if method.comment %}
 {{ method.comment }}
 
         {% endif %}
+        {% if not method.client_streaming %}
         request = {{ method.input }}()
         {% for field in method.input_message.properties %}
             {% if field.field_type == 'message' %}
@@ -77,20 +94,41 @@ class {{ service.py_name }}Stub(betterproto.ServiceStub):
         request.{{ field.py_name }} = {{ field.py_name }}
             {% endif %}
         {% endfor %}
+        {% endif %}
 
         {% if method.server_streaming %}
+        {% if method.client_streaming %}
+        async for response in self._stream_stream(
+            "{{ method.route }}",
+            request_iterator,
+            {{ method.input }},
+            {{ method.output }},
+        ):
+            yield response
+        {% else %}{# i.e. not client streaming #}
         async for response in self._unary_stream(
             "{{ method.route }}",
             request,
             {{ method.output }},
         ):
             yield response
-        {% else %}
+
+        {% endif %}{# if client streaming #}
+        {% else %}{# i.e. not server streaming #}
+        {% if method.client_streaming %}
+        return await self._stream_unary(
+            "{{ method.route }}",
+            request_iterator,
+            {{ method.input }},
+            {{ method.output }}
+        )
+        {% else %}{# i.e. not client streaming #}
         return await self._unary_unary(
             "{{ method.route }}",
             request,
-            {{ method.output }},
+            {{ method.output }}
         )
+        {% endif %}{# client streaming #}
         {% endif %}
 
     {% endfor %}

From 09f821921f9b680c0e8b70020393097643fc466f Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Sat, 23 May 2020 23:35:28 +0200
Subject: [PATCH 04/14] Move ServiceStub to a seperate module and add more rpcs
 to service test

---
 .gitignore                                    |   3 +-
 betterproto/__init__.py                       | 137 +-------------
 betterproto/_types.py                         |   5 +
 betterproto/grpc/__init__.py                  |   0
 betterproto/grpc/grpclib_client.py            | 135 ++++++++++++++
 betterproto/plugin.py                         |   1 -
 .../tests/inputs/service/service.proto        |  16 +-
 betterproto/tests/test_service_client.py      | 176 ++++++++++++++++++
 8 files changed, 336 insertions(+), 137 deletions(-)
 create mode 100644 betterproto/_types.py
 create mode 100644 betterproto/grpc/__init__.py
 create mode 100644 betterproto/grpc/grpclib_client.py
 create mode 100644 betterproto/tests/test_service_client.py

diff --git a/.gitignore b/.gitignore
index dd22728..4ae66e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,5 @@ betterproto/tests/output_*
 dist
 **/*.egg-info
 output
-.idea
\ No newline at end of file
+.idea
+.DS_Store
diff --git a/betterproto/__init__.py b/betterproto/__init__.py
index a2e7a18..8288aaf 100644
--- a/betterproto/__init__.py
+++ b/betterproto/__init__.py
@@ -5,8 +5,9 @@ import json
 import struct
 import sys
 from abc import ABC
-from base64 import b64encode, b64decode
+from base64 import b64decode, b64encode
 from datetime import datetime, timedelta, timezone
+import stringcase
 from typing import (
     Any,
     AsyncGenerator,
@@ -22,22 +23,12 @@ from typing import (
     SupportsBytes,
     Tuple,
     Type,
-    TypeVar,
     Union,
     get_type_hints,
-    TYPE_CHECKING,
 )
-
-
-import grpclib.const
-import stringcase
-
+from ._types import ST, T
 from .casing import safe_snake_case
-
-if TYPE_CHECKING:
-    from grpclib._protocols import IProtoMessage
-    from grpclib.client import Channel
-    from grpclib.metadata import Deadline
+from .grpc.grpclib_client import ServiceStub
 
 if not (sys.version_info.major == 3 and sys.version_info.minor >= 7):
     # Apply backport of datetime.fromisoformat from 3.7
@@ -431,11 +422,6 @@ def parse_fields(value: bytes) -> Generator[ParsedField, None, None]:
         )
 
 
-# Bound type variable to allow methods to return `self` of subclasses
-T = TypeVar("T", bound="Message")
-ST = TypeVar("ST", bound="IProtoMessage")
-
-
 class ProtoClassMetadata:
     oneof_group_by_field: Dict[str, str]
     oneof_field_by_group: Dict[str, Set[dataclasses.Field]]
@@ -1027,118 +1013,3 @@ def _get_wrapper(proto_type: str) -> Type:
         TYPE_STRING: StringValue,
         TYPE_BYTES: BytesValue,
     }[proto_type]
-
-
-_Value = Union[str, bytes]
-_MetadataLike = Union[Mapping[str, _Value], Collection[Tuple[str, _Value]]]
-
-
-class ServiceStub(ABC):
-    """
-    Base class for async gRPC service stubs.
-    """
-
-    def __init__(
-        self,
-        channel: "Channel",
-        *,
-        timeout: Optional[float] = None,
-        deadline: Optional["Deadline"] = None,
-        metadata: Optional[_MetadataLike] = None,
-    ) -> None:
-        self.channel = channel
-        self.timeout = timeout
-        self.deadline = deadline
-        self.metadata = metadata
-
-    def __resolve_request_kwargs(
-        self,
-        timeout: Optional[float],
-        deadline: Optional["Deadline"],
-        metadata: Optional[_MetadataLike],
-    ):
-        return {
-            "timeout": self.timeout if timeout is None else timeout,
-            "deadline": self.deadline if deadline is None else deadline,
-            "metadata": self.metadata if metadata is None else metadata,
-        }
-
-    async def _unary_unary(
-        self,
-        route: str,
-        request: "IProtoMessage",
-        response_type: Type[T],
-        *,
-        timeout: Optional[float] = None,
-        deadline: Optional["Deadline"] = None,
-        metadata: Optional[_MetadataLike] = None,
-    ) -> T:
-        """Make a unary request and return the response."""
-        async with self.channel.request(
-            route,
-            grpclib.const.Cardinality.UNARY_UNARY,
-            type(request),
-            response_type,
-            **self.__resolve_request_kwargs(timeout, deadline, metadata),
-        ) as stream:
-            await stream.send_message(request, end=True)
-            response = await stream.recv_message()
-            assert response is not None
-            return response
-
-    async def _unary_stream(
-        self,
-        route: str,
-        request: "IProtoMessage",
-        response_type: Type[T],
-        *,
-        timeout: Optional[float] = None,
-        deadline: Optional["Deadline"] = None,
-        metadata: Optional[_MetadataLike] = None,
-    ) -> AsyncGenerator[T, None]:
-        """Make a unary request and return the stream response iterator."""
-        async with self.channel.request(
-            route,
-            grpclib.const.Cardinality.UNARY_STREAM,
-            type(request),
-            response_type,
-            **self.__resolve_request_kwargs(timeout, deadline, metadata),
-        ) as stream:
-            await stream.send_message(request, end=True)
-            async for message in stream:
-                yield message
-
-    async def _stream_unary(
-        self,
-        route: str,
-        request_iterator: Iterator["IProtoMessage"],
-        request_type: Type[ST],
-        response_type: Type[T],
-    ) -> T:
-        """Make a stream request and return the response."""
-        async with self.channel.request(
-            route, grpclib.const.Cardinality.STREAM_UNARY, request_type, response_type
-        ) as stream:
-            for message in request_iterator:
-                await stream.send_message(message)
-            await stream.send_request(end=True)
-            response = await stream.recv_message()
-            assert response is not None
-            return response
-
-    async def _stream_stream(
-        self,
-        route: str,
-        request_iterator: Iterator["IProtoMessage"],
-        request_type: Type[ST],
-        response_type: Type[T],
-    ) -> AsyncGenerator[T, None]:
-        """Make a stream request and return the stream response iterator."""
-        async with self.channel.request(
-            route, grpclib.const.Cardinality.STREAM_STREAM, request_type, response_type
-        ) as stream:
-            for message in request_iterator:
-                await stream.send_message(message)
-            await stream.send_request(end=True)
-            async for message in stream:
-                yield message
diff --git a/betterproto/_types.py b/betterproto/_types.py
new file mode 100644
index 0000000..0ff23e4
--- /dev/null
+++ b/betterproto/_types.py
@@ -0,0 +1,5 @@
+from typing import TypeVar
+
+# Bound type variable to allow methods to return `self` of subclasses
+T = TypeVar("T", bound="Message")
+ST = TypeVar("ST", bound="IProtoMessage")
diff --git a/betterproto/grpc/__init__.py b/betterproto/grpc/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/betterproto/grpc/grpclib_client.py b/betterproto/grpc/grpclib_client.py
new file mode 100644
index 0000000..757982e
--- /dev/null
+++ b/betterproto/grpc/grpclib_client.py
@@ -0,0 +1,135 @@
+from abc import ABC
+import grpclib.const
+from typing import (
+    AsyncGenerator,
+    AsyncIterator,
+    Collection,
+    Iterator,
+    Mapping,
+    Optional,
+    Tuple,
+    TYPE_CHECKING,
+    Type,
+    Union,
+)
+from .._types import ST, T
+
+if TYPE_CHECKING:
+    from grpclib._protocols import IProtoMessage
+    from grpclib.client import Channel
+    from grpclib.metadata import Deadline
+
+
+_Value = Union[str, bytes]
+_MetadataLike = Union[Mapping[str, _Value], Collection[Tuple[str, _Value]]]
+
+
+class ServiceStub(ABC):
+    """
+    Base class for async gRPC service stubs.
+    """
+
+    def __init__(
+        self,
+        channel: "Channel",
+        *,
+        timeout: Optional[float] = None,
+        deadline: Optional["Deadline"] = None,
+        metadata: Optional[_MetadataLike] = None,
+    ) -> None:
+        self.channel = channel
+        self.timeout = timeout
+        self.deadline = deadline
+        self.metadata = metadata
+
+    def __resolve_request_kwargs(
+        self,
+        timeout: Optional[float],
+        deadline: Optional["Deadline"],
+        metadata: Optional[_MetadataLike],
+    ):
+        return {
+            "timeout": self.timeout if timeout is None else timeout,
+            "deadline": self.deadline if deadline is None else deadline,
+            "metadata": self.metadata if metadata is None else metadata,
+        }
+
+    async def _unary_unary(
+        self,
+        route: str,
+        request: "IProtoMessage",
+        response_type: Type[T],
+        *,
+        timeout: Optional[float] = None,
+        deadline: Optional["Deadline"] = None,
+        metadata: Optional[_MetadataLike] = None,
+    ) -> T:
+        """Make a unary request and return the response."""
+        async with self.channel.request(
+            route,
+            grpclib.const.Cardinality.UNARY_UNARY,
+            type(request),
+            response_type,
+            **self.__resolve_request_kwargs(timeout, deadline, metadata),
+        ) as stream:
+            await stream.send_message(request, end=True)
+            response = await stream.recv_message()
+            assert response is not None
+            return response
+
+    async def _unary_stream(
+        self,
+        route: str,
+        request: "IProtoMessage",
+        response_type: Type[T],
+        *,
+        timeout: Optional[float] = None,
+        deadline: Optional["Deadline"] = None,
+        metadata: Optional[_MetadataLike] = None,
+    ) -> AsyncGenerator[T, None]:
+        """Make a unary request and return the stream response iterator."""
+        async with self.channel.request(
+            route,
+            grpclib.const.Cardinality.UNARY_STREAM,
+            type(request),
+            response_type,
+            **self.__resolve_request_kwargs(timeout, deadline, metadata),
+        ) as stream:
+            await stream.send_message(request, end=True)
+            async for message in stream:
+                yield message
+
+    async def _stream_unary(
+        self,
+        route: str,
+        request_iterator: Iterator["IProtoMessage"],
+        request_type: Type[ST],
+        response_type: Type[T],
+    ) -> T:
+        """Make a stream request and return the response."""
+        async with self.channel.request(
+            route, grpclib.const.Cardinality.STREAM_UNARY, request_type, response_type
+        ) as stream:
+            for message in request_iterator:
+                await stream.send_message(message)
+            await stream.send_request(end=True)
+            response = await stream.recv_message()
+            assert response is not None
+            return response
+
+    async def _stream_stream(
+        self,
+        route: str,
+        request_iterator: Iterator["IProtoMessage"],
+        request_type: Type[ST],
+        response_type: Type[T],
+    ) -> AsyncGenerator[T, None]:
+        """Make a stream request and return the stream response iterator."""
+        async with self.channel.request(
+            route, grpclib.const.Cardinality.STREAM_STREAM, request_type, response_type
+        ) as stream:
+            for message in request_iterator:
+                await stream.send_message(message)
+            await stream.send_request(end=True)
+            async for message in stream:
+                yield message
diff --git a/betterproto/plugin.py b/betterproto/plugin.py
index b877ce6..44515d5 100755
--- a/betterproto/plugin.py
+++ b/betterproto/plugin.py
@@ -311,7 +311,6 @@ def generate_code(request, response):
                 }
 
                 for j, method in enumerate(service.method):
-
                     input_message = None
                     input_type = get_ref_type(
                         package, output["imports"], method.input_type
diff --git a/betterproto/tests/inputs/service/service.proto b/betterproto/tests/inputs/service/service.proto
index 7c931ed..acfbcdd 100644
--- a/betterproto/tests/inputs/service/service.proto
+++ b/betterproto/tests/inputs/service/service.proto
@@ -3,13 +3,25 @@ syntax = "proto3";
 package service;
 
 message DoThingRequest {
-  int32 iterations = 1;
+  string name = 1;
 }
 
 message DoThingResponse {
-  int32 successfulIterations = 1;
+  repeated string names = 1;
+}
+
+message GetThingRequest {
+  string name = 1;
+}
+
+message GetThingResponse {
+  string name = 1;
+  int32 version = 2;
 }
 
 service Test {
   rpc DoThing (DoThingRequest) returns (DoThingResponse);
+  rpc DoManyThings (stream DoThingRequest) returns (DoThingResponse);
+  rpc GetThingVersions (GetThingRequest) returns (stream GetThingResponse);
+  rpc GetDifferentThings (stream GetThingRequest) returns (stream GetThingResponse);
 }
diff --git a/betterproto/tests/test_service_client.py b/betterproto/tests/test_service_client.py
new file mode 100644
index 0000000..586095d
--- /dev/null
+++ b/betterproto/tests/test_service_client.py
@@ -0,0 +1,176 @@
+import betterproto
+import grpclib
+from grpclib.testing import ChannelFor
+import pytest
+from typing import Dict
+from betterproto.tests.output_betterproto.service.service import (
+    DoThingResponse,
+    DoThingRequest,
+    GetThingRequest,
+    GetThingResponse,
+    TestStub as ThingServiceClient,
+)
+
+
+class ThingService:
+    def __init__(self, test_hook=None):
+        # This lets us pass assertions to the servicer ;)
+        self.test_hook = test_hook
+
+    async def DoThing(
+        self, stream: "grpclib.server.Stream[DoThingRequest, DoThingResponse]"
+    ):
+        request = await stream.recv_message()
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        await stream.send_message(DoThingResponse([request.name]))
+
+    async def DoManyThings(
+        self, stream: "grpclib.server.Stream[DoThingRequest, DoThingResponse]"
+    ):
+        thing_names = [request.name for request in stream]
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        await stream.send_message(DoThingResponse(thing_names))
+
+    async def GetThingVersions(
+        self, stream: "grpclib.server.Stream[GetThingRequest, GetThingResponse]"
+    ):
+        request = await stream.recv_message()
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        for version_num in range(1, 6):
+            await stream.send_message(
+                GetThingResponse(name=request, version=version_num)
+            )
+
+    async def GetDifferentThings(
+        self, stream: "grpclib.server.Stream[GetThingRequest, GetThingResponse]"
+    ):
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        #  Response to each input item immediately
+        for request in stream:
+            await stream.send_message(GetThingResponse(name=request.name, version=1))
+
+    def __mapping__(self) -> Dict[str, grpclib.const.Handler]:
+        return {
+            "/service.Test/DoThing": grpclib.const.Handler(
+                self.DoThing,
+                grpclib.const.Cardinality.UNARY_UNARY,
+                DoThingRequest,
+                DoThingResponse,
+            ),
+            "/service.Test/DoManyThings": grpclib.const.Handler(
+                self.DoManyThings,
+                grpclib.const.Cardinality.STREAM_UNARY,
+                DoThingRequest,
+                DoThingResponse,
+            ),
+            "/service.Test/GetThingVersions": grpclib.const.Handler(
+                self.GetThingVersions,
+                grpclib.const.Cardinality.UNARY_STREAM,
+                GetThingRequest,
+                GetThingResponse,
+            ),
+            "/service.Test/GetDifferentThings": grpclib.const.Handler(
+                self.GetDifferentThings,
+                grpclib.const.Cardinality.STREAM_STREAM,
+                GetThingRequest,
+                GetThingResponse,
+            ),
+        }
+
+
+async def _test_stub(stub, name="clean room", **kwargs):
+    response = await stub.do_thing(name=name)
+    assert response.names == [name]
+
+
+def _assert_request_meta_recieved(deadline, metadata):
+    def server_side_test(stream):
+        assert stream.deadline._timestamp == pytest.approx(
+            deadline._timestamp, 1
+        ), "The provided deadline should be recieved serverside"
+        assert (
+            stream.metadata["authorization"] == metadata["authorization"]
+        ), "The provided authorization metadata should be recieved serverside"
+
+    return server_side_test
+
+
+@pytest.mark.asyncio
+async def test_simple_service_call():
+    async with ChannelFor([ThingService()]) as channel:
+        await _test_stub(ThingServiceClient(channel))
+
+
+@pytest.mark.asyncio
+async def test_service_call_with_upfront_request_params():
+    # Setting deadline
+    deadline = grpclib.metadata.Deadline.from_timeout(22)
+    metadata = {"authorization": "12345"}
+    async with ChannelFor(
+        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata))]
+    ) as channel:
+        await _test_stub(
+            ThingServiceClient(channel, deadline=deadline, metadata=metadata)
+        )
+
+    # Setting timeout
+    timeout = 99
+    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
+    metadata = {"authorization": "12345"}
+    async with ChannelFor(
+        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata))]
+    ) as channel:
+        await _test_stub(
+            ThingServiceClient(channel, timeout=timeout, metadata=metadata)
+        )
+
+
+@pytest.mark.asyncio
+async def test_service_call_lower_level_with_overrides():
+    THING_TO_DO = "get milk"
+
+    # Setting deadline
+    deadline = grpclib.metadata.Deadline.from_timeout(22)
+    metadata = {"authorization": "12345"}
+    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(28)
+    kwarg_metadata = {"authorization": "12345"}
+    async with ChannelFor(
+        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata))]
+    ) as channel:
+        stub = ThingServiceClient(channel, deadline=deadline, metadata=metadata)
+        response = await stub._unary_unary(
+            "/service.Test/DoThing",
+            DoThingRequest(THING_TO_DO),
+            DoThingResponse,
+            deadline=kwarg_deadline,
+            metadata=kwarg_metadata,
+        )
+        assert response.names == [THING_TO_DO]
+
+    # Setting timeout
+    timeout = 99
+    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
+    metadata = {"authorization": "12345"}
+    kwarg_timeout = 9000
+    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(kwarg_timeout)
+    kwarg_metadata = {"authorization": "09876"}
+    async with ChannelFor(
+        [
+            ThingService(
+                test_hook=_assert_request_meta_recieved(kwarg_deadline, kwarg_metadata)
+            )
+        ]
+    ) as channel:
+        stub = ThingServiceClient(channel, deadline=deadline, metadata=metadata)
+        response = await stub._unary_unary(
+            "/service.Test/DoThing",
+            DoThingRequest(THING_TO_DO),
+            DoThingResponse,
+            timeout=kwarg_timeout,
+            metadata=kwarg_metadata,
+        )
+        assert response.names == [THING_TO_DO]

From 4b6f55dce58d82f8db14ada7e08063c14eab9b94 Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Sun, 7 Jun 2020 17:51:26 +0200
Subject: [PATCH 05/14] Finish implementation and testing of client

Including stream_unary and stream_stream call methods.

Also
- improve organisation of relevant tests
- fix some generated type annotations
- Add AsyncChannel utility cos it's useful
---
 betterproto/__init__.py                       |   2 +-
 betterproto/grpc/grpclib_client.py            |  68 ++++--
 betterproto/grpc/util/__init__.py             |   0
 betterproto/grpc/util/async_channel.py        | 204 ++++++++++++++++++
 betterproto/plugin.py                         |   9 +-
 betterproto/templates/template.py.j2          |  16 +-
 betterproto/tests/grpc/__init__.py            |   0
 betterproto/tests/grpc/test_grpclib_client.py | 150 +++++++++++++
 betterproto/tests/grpc/thing_service.py       |  83 +++++++
 .../test_googletypes_response.py              |   2 +-
 .../tests/inputs/service/test_service.py      | 132 ------------
 betterproto/tests/test_service_client.py      | 176 ---------------
 12 files changed, 503 insertions(+), 339 deletions(-)
 create mode 100644 betterproto/grpc/util/__init__.py
 create mode 100644 betterproto/grpc/util/async_channel.py
 create mode 100644 betterproto/tests/grpc/__init__.py
 create mode 100644 betterproto/tests/grpc/test_grpclib_client.py
 create mode 100644 betterproto/tests/grpc/thing_service.py
 delete mode 100644 betterproto/tests/inputs/service/test_service.py
 delete mode 100644 betterproto/tests/test_service_client.py

diff --git a/betterproto/__init__.py b/betterproto/__init__.py
index 8288aaf..6a53d65 100644
--- a/betterproto/__init__.py
+++ b/betterproto/__init__.py
@@ -593,7 +593,7 @@ class Message(ABC):
             serialize_empty = False
             if isinstance(value, Message) and value._serialized_on_wire:
                 # Empty messages can still be sent on the wire if they were
-                # set (or received empty).
+                # set (or recieved empty).
                 serialize_empty = True
 
             if value == self._get_field_default(field_name) and not (
diff --git a/betterproto/grpc/grpclib_client.py b/betterproto/grpc/grpclib_client.py
index 757982e..7218574 100644
--- a/betterproto/grpc/grpclib_client.py
+++ b/betterproto/grpc/grpclib_client.py
@@ -1,7 +1,8 @@
 from abc import ABC
+import asyncio
 import grpclib.const
 from typing import (
-    AsyncGenerator,
+    Any,
     AsyncIterator,
     Collection,
     Iterator,
@@ -16,17 +17,18 @@ from .._types import ST, T
 
 if TYPE_CHECKING:
     from grpclib._protocols import IProtoMessage
-    from grpclib.client import Channel
+    from grpclib.client import Channel, Stream
     from grpclib.metadata import Deadline
 
 
 _Value = Union[str, bytes]
 _MetadataLike = Union[Mapping[str, _Value], Collection[Tuple[str, _Value]]]
+_MessageSource = Union[Iterator["IProtoMessage"], AsyncIterator["IProtoMessage"]]
 
 
 class ServiceStub(ABC):
     """
-    Base class for async gRPC service stubs.
+    Base class for async gRPC clients.
     """
 
     def __init__(
@@ -86,7 +88,7 @@ class ServiceStub(ABC):
         timeout: Optional[float] = None,
         deadline: Optional["Deadline"] = None,
         metadata: Optional[_MetadataLike] = None,
-    ) -> AsyncGenerator[T, None]:
+    ) -> AsyncIterator[T]:
         """Make a unary request and return the stream response iterator."""
         async with self.channel.request(
             route,
@@ -102,17 +104,23 @@ class ServiceStub(ABC):
     async def _stream_unary(
         self,
         route: str,
-        request_iterator: Iterator["IProtoMessage"],
+        request_iterator: _MessageSource,
         request_type: Type[ST],
         response_type: Type[T],
+        *,
+        timeout: Optional[float] = None,
+        deadline: Optional["Deadline"] = None,
+        metadata: Optional[_MetadataLike] = None,
     ) -> T:
         """Make a stream request and return the response."""
         async with self.channel.request(
-            route, grpclib.const.Cardinality.STREAM_UNARY, request_type, response_type
+            route,
+            grpclib.const.Cardinality.STREAM_UNARY,
+            request_type,
+            response_type,
+            **self.__resolve_request_kwargs(timeout, deadline, metadata),
         ) as stream:
-            for message in request_iterator:
-                await stream.send_message(message)
-            await stream.send_request(end=True)
+            await self._send_messages(stream, request_iterator)
             response = await stream.recv_message()
             assert response is not None
             return response
@@ -120,16 +128,42 @@ class ServiceStub(ABC):
     async def _stream_stream(
         self,
         route: str,
-        request_iterator: Iterator["IProtoMessage"],
+        request_iterator: _MessageSource,
         request_type: Type[ST],
         response_type: Type[T],
-    ) -> AsyncGenerator[T, None]:
-        """Make a stream request and return the stream response iterator."""
+        *,
+        timeout: Optional[float] = None,
+        deadline: Optional["Deadline"] = None,
+        metadata: Optional[_MetadataLike] = None,
+    ) -> AsyncIterator[T]:
+        """
+        Make a stream request and return an AsyncIterator to iterate over response
+        messages.
+        """
         async with self.channel.request(
-            route, grpclib.const.Cardinality.STREAM_STREAM, request_type, response_type
+            route,
+            grpclib.const.Cardinality.STREAM_STREAM,
+            request_type,
+            response_type,
+            **self.__resolve_request_kwargs(timeout, deadline, metadata),
         ) as stream:
-            for message in request_iterator:
+            await stream.send_request()
+            sending_task = asyncio.ensure_future(
+                self._send_messages(stream, request_iterator)
+            )
+            try:
+                async for response in stream:
+                    yield response
+            except:
+                sending_task.cancel()
+                raise
+
+    @staticmethod
+    async def _send_messages(stream, messages: _MessageSource):
+        if hasattr(messages, "__aiter__"):
+            async for message in messages:
                 await stream.send_message(message)
-            await stream.send_request(end=True)
-            async for message in stream:
-                yield message
+        else:
+            for message in messages:
+                await stream.send_message(message)
+        await stream.end()
diff --git a/betterproto/grpc/util/__init__.py b/betterproto/grpc/util/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/betterproto/grpc/util/async_channel.py b/betterproto/grpc/util/async_channel.py
new file mode 100644
index 0000000..7e83c94
--- /dev/null
+++ b/betterproto/grpc/util/async_channel.py
@@ -0,0 +1,204 @@
+import asyncio
+from typing import (
+    AsyncIterable,
+    AsyncIterator,
+    Iterable,
+    Optional,
+    TypeVar,
+    Union,
+)
+
+T = TypeVar("T")
+
+
+class ChannelClosed(Exception):
+    """
+    An exception raised on an attempt to send through a closed channel
+    """
+
+    pass
+
+
+class ChannelDone(Exception):
+    """
+    An exception raised on an attempt to send recieve from a channel that is both closed
+    and empty.
+    """
+
+    pass
+
+
+class AsyncChannel(AsyncIterable[T]):
+    """
+    A buffered async channel for sending items between coroutines with FIFO semantics.
+
+    This makes decoupled bidirection steaming gRPC requests easy if used like:
+
+    .. code-block:: python
+        client = GeneratedStub(grpclib_chan)
+        # The channel can be initialised with items to send immediately
+        request_chan = AsyncChannel([ReqestObject(...), ReqestObject(...)])
+        async for response in client.rpc_call(request_chan):
+            # The response iterator will remain active until the connection is closed
+            ...
+            # More items can be sent at any time
+            await request_chan.send(ReqestObject(...))
+            ...
+            # The channel must be closed to complete the gRPC connection
+            request_chan.close()
+
+    Items can be sent through the channel by either:
+    - providing an iterable to the constructor
+    - providing an iterable to the send_from method
+    - passing them to the send method one at a time
+
+    Items can be recieved from the channel by either:
+    - iterating over the channel with a for loop to get all items
+    - calling the recieve method to get one item at a time
+
+    If the channel is empty then recievers will wait until either an item appears or the
+    channel is closed.
+
+    Once the channel is closed then subsequent attempt to send through the channel will
+    fail with a ChannelClosed exception.
+
+    When th channel is closed and empty then it is done, and further attempts to recieve
+    from it will fail with a ChannelDone exception
+
+    If multiple coroutines recieve from the channel concurrently, each item sent will be
+    recieved by only one of the recievers.
+
+    :param source:
+        An optional iterable will items that should be sent through the channel
+        immediately.
+    :param buffer_limit:
+        Limit the number of items that can be buffered in the channel, A value less than
+        1 implies no limit. If the channel is full then attempts to send more items will
+        result in the sender waiting until an item is recieved from the channel.
+    :param close:
+        If set to True then the channel will automatically close after exhausting source
+        or immediately if no source is provided.
+    """
+
+    def __init__(
+        self,
+        source: Union[Iterable[T], AsyncIterable[T]] = tuple(),
+        *,
+        buffer_limit: int = 0,
+        close: bool = False,
+    ):
+        self._queue: asyncio.Queue[Union[T, object]] = asyncio.Queue(buffer_limit)
+        self._closed = False
+        self._sending_task = (
+            asyncio.ensure_future(self.send_from(source, close)) if source else None
+        )
+        self._waiting_recievers: int = 0
+        # Track whether flush has been invoked so it can only happen once
+        self._flushed = False
+
+    def __aiter__(self) -> AsyncIterator[T]:
+        return self
+
+    async def __anext__(self) -> T:
+        if self.done:
+            raise StopAsyncIteration
+        self._waiting_recievers += 1
+        try:
+            result = await self._queue.get()
+            if result is self.__flush:
+                raise StopAsyncIteration
+        finally:
+            self._waiting_recievers -= 1
+            self._queue.task_done()
+
+    def closed(self) -> bool:
+        """
+        Returns True if this channel is closed and no-longer accepting new items
+        """
+        return self._closed
+
+    def done(self) -> bool:
+        """
+        Check if this channel is done.
+
+        :return: True if this channel is closed and and has been drained of items in
+        which case any further attempts to recieve an item from this channel will raise
+        a ChannelDone exception.
+        """
+        # After close the channel is not yet done until there is at least one waiting
+        # reciever per enqueued item.
+        return self._closed and self._queue.qsize() <= self._waiting_recievers
+
+    async def send_from(
+        self, source: Union[Iterable[T], AsyncIterable[T]], close: bool = False
+    ):
+        """
+        Iterates the given [Async]Iterable and sends all the resulting items.
+        If close is set to True then subsequent send calls will be rejected with a
+        ChannelClosed exception.
+        :param source: an iterable of items to send
+        :param close:
+            if True then the channel will be closed after the source has been exhausted
+
+        """
+        if self._closed:
+            raise ChannelClosed("Cannot send through a closed channel")
+        if isinstance(source, AsyncIterable):
+            async for item in source:
+                await self._queue.put(item)
+        else:
+            for item in source:
+                await self._queue.put(item)
+        if close:
+            # Complete the closing process
+            await self.close()
+
+    async def send(self, item: T):
+        """
+        Send a single item over this channel.
+        :param item: The item to send
+        """
+        if self._closed:
+            raise ChannelClosed("Cannot send through a closed channel")
+        await self._queue.put(item)
+
+    async def recieve(self) -> Optional[T]:
+        """
+        Returns the next item from this channel when it becomes available,
+        or None if the channel is closed before another item is sent.
+        :return: An item from the channel
+        """
+        if self.done:
+            raise ChannelDone("Cannot recieve from a closed channel")
+        self._waiting_recievers += 1
+        try:
+            result = await self._queue.get()
+            if result is self.__flush:
+                return None
+            return result
+        finally:
+            self._waiting_recievers -= 1
+            self._queue.task_done()
+
+    def close(self):
+        """
+        Close this channel to new items
+        """
+        if self._sending_task is not None:
+            self._sending_task.cancel()
+        self._closed = True
+        asyncio.ensure_future(self._flush_queue())
+
+    async def _flush_queue(self):
+        """
+        To be called after the channel is closed. Pushes a number of self.__flush
+        objects to the queue to ensure no waiting consumers get deadlocked.
+        """
+        if not self._flushed:
+            self._flushed = True
+            deadlocked_recievers = max(0, self._waiting_recievers - self._queue.qsize())
+            for _ in range(deadlocked_recievers):
+                await self._queue.put(self.__flush)
+
+    # A special signal object for flushing the queue when the channel is closed
+    __flush = object()
diff --git a/betterproto/plugin.py b/betterproto/plugin.py
index 44515d5..85fd905 100755
--- a/betterproto/plugin.py
+++ b/betterproto/plugin.py
@@ -344,11 +344,12 @@ def generate_code(request, response):
                         }
                     )
 
-                    if method.server_streaming:
-                        output["typing_imports"].add("AsyncGenerator")
-
                     if method.client_streaming:
-                        output["typing_imports"].add("Iterator")
+                        output["typing_imports"].add("AsyncIterable")
+                        output["typing_imports"].add("Iterable")
+                        output["typing_imports"].add("Union")
+                    if method.server_streaming:
+                        output["typing_imports"].add("AsyncIterator")
 
                 output["services"].append(data)
 
diff --git a/betterproto/templates/template.py.j2 b/betterproto/templates/template.py.j2
index c4c3029..3894619 100644
--- a/betterproto/templates/template.py.j2
+++ b/betterproto/templates/template.py.j2
@@ -77,9 +77,9 @@ class {{ service.py_name }}Stub(betterproto.ServiceStub):
             {%- endif -%}
         {%- else -%}
             {# Client streaming: need a request iterator instead #}
-            , request_iterator: Iterator["{{ method.input }}"]
+            , request_iterator: Union[AsyncIterable["{{ method.input }}"], Iterable["{{ method.input }}"]]
         {%- endif -%}
-            ) -> {% if method.server_streaming %}AsyncGenerator[{{ method.output }}, None]{% else %}{{ method.output }}{% endif %}:
+            ) -> {% if method.server_streaming %}AsyncIterator[{{ method.output }}]{% else %}{{ method.output }}{% endif %}:
         {% if method.comment %}
 {{ method.comment }}
 
@@ -97,7 +97,7 @@ class {{ service.py_name }}Stub(betterproto.ServiceStub):
         {% endif %}
 
         {% if method.server_streaming %}
-        {% if method.client_streaming %}
+            {% if method.client_streaming %}
         async for response in self._stream_stream(
             "{{ method.route }}",
             request_iterator,
@@ -105,7 +105,7 @@ class {{ service.py_name }}Stub(betterproto.ServiceStub):
             {{ method.output }},
         ):
             yield response
-        {% else %}{# i.e. not client streaming #}
+            {% else %}{# i.e. not client streaming #}
         async for response in self._unary_stream(
             "{{ method.route }}",
             request,
@@ -113,22 +113,22 @@ class {{ service.py_name }}Stub(betterproto.ServiceStub):
         ):
             yield response
 
-        {% endif %}{# if client streaming #}
+            {% endif %}{# if client streaming #}
         {% else %}{# i.e. not server streaming #}
-        {% if method.client_streaming %}
+            {% if method.client_streaming %}
         return await self._stream_unary(
             "{{ method.route }}",
             request_iterator,
             {{ method.input }},
             {{ method.output }}
         )
-        {% else %}{# i.e. not client streaming #}
+            {% else %}{# i.e. not client streaming #}
         return await self._unary_unary(
             "{{ method.route }}",
             request,
             {{ method.output }}
         )
-        {% endif %}{# client streaming #}
+            {% endif %}{# client streaming #}
         {% endif %}
 
     {% endfor %}
diff --git a/betterproto/tests/grpc/__init__.py b/betterproto/tests/grpc/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/betterproto/tests/grpc/test_grpclib_client.py b/betterproto/tests/grpc/test_grpclib_client.py
new file mode 100644
index 0000000..dc57fe4
--- /dev/null
+++ b/betterproto/tests/grpc/test_grpclib_client.py
@@ -0,0 +1,150 @@
+from betterproto.tests.output_betterproto.service.service import (
+    DoThingResponse,
+    DoThingRequest,
+    GetThingRequest,
+    GetThingResponse,
+    TestStub as ThingServiceClient,
+)
+import grpclib
+from grpclib.testing import ChannelFor
+import pytest
+from betterproto.grpc.util.async_channel import AsyncChannel
+from .thing_service import ThingService
+
+
+async def _test_client(client, name="clean room", **kwargs):
+    response = await client.do_thing(name=name)
+    assert response.names == [name]
+
+
+def _assert_request_meta_recieved(deadline, metadata):
+    def server_side_test(stream):
+        assert stream.deadline._timestamp == pytest.approx(
+            deadline._timestamp, 1
+        ), "The provided deadline should be recieved serverside"
+        assert (
+            stream.metadata["authorization"] == metadata["authorization"]
+        ), "The provided authorization metadata should be recieved serverside"
+
+    return server_side_test
+
+
+@pytest.mark.asyncio
+async def test_simple_service_call():
+    async with ChannelFor([ThingService()]) as channel:
+        await _test_client(ThingServiceClient(channel))
+
+
+@pytest.mark.asyncio
+async def test_service_call_with_upfront_request_params():
+    # Setting deadline
+    deadline = grpclib.metadata.Deadline.from_timeout(22)
+    metadata = {"authorization": "12345"}
+    async with ChannelFor(
+        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata),)]
+    ) as channel:
+        await _test_client(
+            ThingServiceClient(channel, deadline=deadline, metadata=metadata)
+        )
+
+    # Setting timeout
+    timeout = 99
+    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
+    metadata = {"authorization": "12345"}
+    async with ChannelFor(
+        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata),)]
+    ) as channel:
+        await _test_client(
+            ThingServiceClient(channel, timeout=timeout, metadata=metadata)
+        )
+
+
+@pytest.mark.asyncio
+async def test_service_call_lower_level_with_overrides():
+    THING_TO_DO = "get milk"
+
+    # Setting deadline
+    deadline = grpclib.metadata.Deadline.from_timeout(22)
+    metadata = {"authorization": "12345"}
+    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(28)
+    kwarg_metadata = {"authorization": "12345"}
+    async with ChannelFor(
+        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata),)]
+    ) as channel:
+        client = ThingServiceClient(channel, deadline=deadline, metadata=metadata)
+        response = await client._unary_unary(
+            "/service.Test/DoThing",
+            DoThingRequest(THING_TO_DO),
+            DoThingResponse,
+            deadline=kwarg_deadline,
+            metadata=kwarg_metadata,
+        )
+        assert response.names == [THING_TO_DO]
+
+    # Setting timeout
+    timeout = 99
+    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
+    metadata = {"authorization": "12345"}
+    kwarg_timeout = 9000
+    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(kwarg_timeout)
+    kwarg_metadata = {"authorization": "09876"}
+    async with ChannelFor(
+        [
+            ThingService(
+                test_hook=_assert_request_meta_recieved(kwarg_deadline, kwarg_metadata),
+            )
+        ]
+    ) as channel:
+        client = ThingServiceClient(channel, deadline=deadline, metadata=metadata)
+        response = await client._unary_unary(
+            "/service.Test/DoThing",
+            DoThingRequest(THING_TO_DO),
+            DoThingResponse,
+            timeout=kwarg_timeout,
+            metadata=kwarg_metadata,
+        )
+        assert response.names == [THING_TO_DO]
+
+
+@pytest.mark.asyncio
+async def test_async_gen_for_unary_stream_request():
+    thing_name = "my milkshakes"
+
+    async with ChannelFor([ThingService()]) as channel:
+        client = ThingServiceClient(channel)
+        expected_versions = [5, 4, 3, 2, 1]
+        async for response in client.get_thing_versions(name=thing_name):
+            assert response.name == thing_name
+            assert response.version == expected_versions.pop()
+
+
+@pytest.mark.asyncio
+async def test_async_gen_for_stream_stream_request():
+    some_things = ["cake", "cricket", "coral reef"]
+    more_things = ["ball", "that", "56kmodem", "liberal humanism", "cheesesticks"]
+    expected_things = (*some_things, *more_things)
+
+    async with ChannelFor([ThingService()]) as channel:
+        client = ThingServiceClient(channel)
+        # Use an AsyncChannel to decouple sending and recieving, it'll send some_things
+        # immediately and we'll use it to send more_things later, after recieving some
+        # results
+        request_chan = AsyncChannel(GetThingRequest(name) for name in some_things)
+        response_index = 0
+        async for response in client.get_different_things(request_chan):
+            assert response.name == expected_things[response_index]
+            assert response.version == response_index + 1
+            response_index += 1
+            if more_things:
+                # Send some more requests as we recieve reponses to be sure coordination of
+                # send/recieve events doesn't matter
+                another_response = await request_chan.send(
+                    GetThingRequest(more_things.pop(0))
+                )
+                if another_response is not None:
+                    assert another_response.name == expected_things[response_index]
+                    assert another_response.version == response_index
+                    response_index += 1
+            else:
+                # No more things to send make sure channel is closed
+                await request_chan.close()
diff --git a/betterproto/tests/grpc/thing_service.py b/betterproto/tests/grpc/thing_service.py
new file mode 100644
index 0000000..bc9fff8
--- /dev/null
+++ b/betterproto/tests/grpc/thing_service.py
@@ -0,0 +1,83 @@
+from betterproto.tests.output_betterproto.service.service import (
+    DoThingResponse,
+    DoThingRequest,
+    GetThingRequest,
+    GetThingResponse,
+    TestStub as ThingServiceClient,
+)
+import grpclib
+from typing import Any, Dict
+
+
+class ThingService:
+    def __init__(self, test_hook=None):
+        # This lets us pass assertions to the servicer ;)
+        self.test_hook = test_hook
+
+    async def do_thing(
+        self, stream: "grpclib.server.Stream[DoThingRequest, DoThingResponse]"
+    ):
+        request = await stream.recv_message()
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        await stream.send_message(DoThingResponse([request.name]))
+
+    async def do_many_things(
+        self, stream: "grpclib.server.Stream[DoThingRequest, DoThingResponse]"
+    ):
+        thing_names = [request.name for request in stream]
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        await stream.send_message(DoThingResponse(thing_names))
+
+    async def get_thing_versions(
+        self, stream: "grpclib.server.Stream[GetThingRequest, GetThingResponse]"
+    ):
+        request = await stream.recv_message()
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        for version_num in range(1, 6):
+            await stream.send_message(
+                GetThingResponse(name=request.name, version=version_num)
+            )
+
+    async def get_different_things(
+        self, stream: "grpclib.server.Stream[GetThingRequest, GetThingResponse]"
+    ):
+        if self.test_hook is not None:
+            self.test_hook(stream)
+        #  Respond to each input item immediately
+        response_num = 0
+        async for request in stream:
+            response_num += 1
+            await stream.send_message(
+                GetThingResponse(name=request.name, version=response_num)
+            )
+
+    def __mapping__(self) -> Dict[str, "grpclib.const.Handler"]:
+        return {
+            "/service.Test/DoThing": grpclib.const.Handler(
+                self.do_thing,
+                grpclib.const.Cardinality.UNARY_UNARY,
+                DoThingRequest,
+                DoThingResponse,
+            ),
+            "/service.Test/DoManyThings": grpclib.const.Handler(
+                self.do_many_things,
+                grpclib.const.Cardinality.STREAM_UNARY,
+                DoThingRequest,
+                DoThingResponse,
+            ),
+            "/service.Test/GetThingVersions": grpclib.const.Handler(
+                self.get_thing_versions,
+                grpclib.const.Cardinality.UNARY_STREAM,
+                GetThingRequest,
+                GetThingResponse,
+            ),
+            "/service.Test/GetDifferentThings": grpclib.const.Handler(
+                self.get_different_things,
+                grpclib.const.Cardinality.STREAM_STREAM,
+                GetThingRequest,
+                GetThingResponse,
+            ),
+        }
diff --git a/betterproto/tests/inputs/googletypes_response/test_googletypes_response.py b/betterproto/tests/inputs/googletypes_response/test_googletypes_response.py
index 02fa193..bd5f602 100644
--- a/betterproto/tests/inputs/googletypes_response/test_googletypes_response.py
+++ b/betterproto/tests/inputs/googletypes_response/test_googletypes_response.py
@@ -23,7 +23,7 @@ test_cases = [
 
 @pytest.mark.asyncio
 @pytest.mark.parametrize(["service_method", "wrapper_class", "value"], test_cases)
-async def test_channel_receives_wrapped_type(
+async def test_channel_recieves_wrapped_type(
     service_method: Callable[[TestStub], Any], wrapper_class: Callable, value
 ):
     wrapped_value = wrapper_class()
diff --git a/betterproto/tests/inputs/service/test_service.py b/betterproto/tests/inputs/service/test_service.py
deleted file mode 100644
index 2a6ca59..0000000
--- a/betterproto/tests/inputs/service/test_service.py
+++ /dev/null
@@ -1,132 +0,0 @@
-import betterproto
-import grpclib
-from grpclib.testing import ChannelFor
-import pytest
-from typing import Dict
-
-from betterproto.tests.output_betterproto.service.service import (
-    DoThingResponse,
-    DoThingRequest,
-    TestStub as ExampleServiceStub,
-)
-
-
-class ExampleService:
-    def __init__(self, test_hook=None):
-        # This lets us pass assertions to the servicer ;)
-        self.test_hook = test_hook
-
-    async def DoThing(
-        self, stream: "grpclib.server.Stream[DoThingRequest, DoThingResponse]"
-    ):
-        request = await stream.recv_message()
-        print("self.test_hook", self.test_hook)
-        if self.test_hook is not None:
-            self.test_hook(stream)
-        for iteration in range(request.iterations):
-            pass
-        await stream.send_message(DoThingResponse(request.iterations))
-
-    def __mapping__(self) -> Dict[str, grpclib.const.Handler]:
-        return {
-            "/service.Test/DoThing": grpclib.const.Handler(
-                self.DoThing,
-                grpclib.const.Cardinality.UNARY_UNARY,
-                DoThingRequest,
-                DoThingResponse,
-            )
-        }
-
-
-async def _test_stub(stub, iterations=42, **kwargs):
-    response = await stub.do_thing(iterations=iterations)
-    assert response.successful_iterations == iterations
-
-
-def _get_server_side_test(deadline, metadata):
-    def server_side_test(stream):
-        assert stream.deadline._timestamp == pytest.approx(
-            deadline._timestamp, 1
-        ), "The provided deadline should be recieved serverside"
-        assert (
-            stream.metadata["authorization"] == metadata["authorization"]
-        ), "The provided authorization metadata should be recieved serverside"
-
-    return server_side_test
-
-
-@pytest.mark.asyncio
-async def test_simple_service_call():
-    async with ChannelFor([ExampleService()]) as channel:
-        await _test_stub(ExampleServiceStub(channel))
-
-
-@pytest.mark.asyncio
-async def test_service_call_with_upfront_request_params():
-    # Setting deadline
-    deadline = grpclib.metadata.Deadline.from_timeout(22)
-    metadata = {"authorization": "12345"}
-    async with ChannelFor(
-        [ExampleService(test_hook=_get_server_side_test(deadline, metadata))]
-    ) as channel:
-        await _test_stub(
-            ExampleServiceStub(channel, deadline=deadline, metadata=metadata)
-        )
-
-    # Setting timeout
-    timeout = 99
-    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
-    metadata = {"authorization": "12345"}
-    async with ChannelFor(
-        [ExampleService(test_hook=_get_server_side_test(deadline, metadata))]
-    ) as channel:
-        await _test_stub(
-            ExampleServiceStub(channel, timeout=timeout, metadata=metadata)
-        )
-
-
-@pytest.mark.asyncio
-async def test_service_call_lower_level_with_overrides():
-    ITERATIONS = 99
-
-    # Setting deadline
-    deadline = grpclib.metadata.Deadline.from_timeout(22)
-    metadata = {"authorization": "12345"}
-    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(28)
-    kwarg_metadata = {"authorization": "12345"}
-    async with ChannelFor(
-        [ExampleService(test_hook=_get_server_side_test(deadline, metadata))]
-    ) as channel:
-        stub = ExampleServiceStub(channel, deadline=deadline, metadata=metadata)
-        response = await stub._unary_unary(
-            "/service.Test/DoThing",
-            DoThingRequest(ITERATIONS),
-            DoThingResponse,
-            deadline=kwarg_deadline,
-            metadata=kwarg_metadata,
-        )
-        assert response.successful_iterations == ITERATIONS
-
-    # Setting timeout
-    timeout = 99
-    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
-    metadata = {"authorization": "12345"}
-    kwarg_timeout = 9000
-    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(kwarg_timeout)
-    kwarg_metadata = {"authorization": "09876"}
-    async with ChannelFor(
-        [
-            ExampleService(
-                test_hook=_get_server_side_test(kwarg_deadline, kwarg_metadata)
-            )
-        ]
-    ) as channel:
-        stub = ExampleServiceStub(channel, deadline=deadline, metadata=metadata)
-        response = await stub._unary_unary(
-            "/service.Test/DoThing",
-            DoThingRequest(ITERATIONS),
-            DoThingResponse,
-            timeout=kwarg_timeout,
-            metadata=kwarg_metadata,
-        )
-        assert response.successful_iterations == ITERATIONS
diff --git a/betterproto/tests/test_service_client.py b/betterproto/tests/test_service_client.py
deleted file mode 100644
index 586095d..0000000
--- a/betterproto/tests/test_service_client.py
+++ /dev/null
@@ -1,176 +0,0 @@
-import betterproto
-import grpclib
-from grpclib.testing import ChannelFor
-import pytest
-from typing import Dict
-from betterproto.tests.output_betterproto.service.service import (
-    DoThingResponse,
-    DoThingRequest,
-    GetThingRequest,
-    GetThingResponse,
-    TestStub as ThingServiceClient,
-)
-
-
-class ThingService:
-    def __init__(self, test_hook=None):
-        # This lets us pass assertions to the servicer ;)
-        self.test_hook = test_hook
-
-    async def DoThing(
-        self, stream: "grpclib.server.Stream[DoThingRequest, DoThingResponse]"
-    ):
-        request = await stream.recv_message()
-        if self.test_hook is not None:
-            self.test_hook(stream)
-        await stream.send_message(DoThingResponse([request.name]))
-
-    async def DoManyThings(
-        self, stream: "grpclib.server.Stream[DoThingRequest, DoThingResponse]"
-    ):
-        thing_names = [request.name for request in stream]
-        if self.test_hook is not None:
-            self.test_hook(stream)
-        await stream.send_message(DoThingResponse(thing_names))
-
-    async def GetThingVersions(
-        self, stream: "grpclib.server.Stream[GetThingRequest, GetThingResponse]"
-    ):
-        request = await stream.recv_message()
-        if self.test_hook is not None:
-            self.test_hook(stream)
-        for version_num in range(1, 6):
-            await stream.send_message(
-                GetThingResponse(name=request, version=version_num)
-            )
-
-    async def GetDifferentThings(
-        self, stream: "grpclib.server.Stream[GetThingRequest, GetThingResponse]"
-    ):
-        if self.test_hook is not None:
-            self.test_hook(stream)
-        #  Response to each input item immediately
-        for request in stream:
-            await stream.send_message(GetThingResponse(name=request.name, version=1))
-
-    def __mapping__(self) -> Dict[str, grpclib.const.Handler]:
-        return {
-            "/service.Test/DoThing": grpclib.const.Handler(
-                self.DoThing,
-                grpclib.const.Cardinality.UNARY_UNARY,
-                DoThingRequest,
-                DoThingResponse,
-            ),
-            "/service.Test/DoManyThings": grpclib.const.Handler(
-                self.DoManyThings,
-                grpclib.const.Cardinality.STREAM_UNARY,
-                DoThingRequest,
-                DoThingResponse,
-            ),
-            "/service.Test/GetThingVersions": grpclib.const.Handler(
-                self.GetThingVersions,
-                grpclib.const.Cardinality.UNARY_STREAM,
-                GetThingRequest,
-                GetThingResponse,
-            ),
-            "/service.Test/GetDifferentThings": grpclib.const.Handler(
-                self.GetDifferentThings,
-                grpclib.const.Cardinality.STREAM_STREAM,
-                GetThingRequest,
-                GetThingResponse,
-            ),
-        }
-
-
-async def _test_stub(stub, name="clean room", **kwargs):
-    response = await stub.do_thing(name=name)
-    assert response.names == [name]
-
-
-def _assert_request_meta_recieved(deadline, metadata):
-    def server_side_test(stream):
-        assert stream.deadline._timestamp == pytest.approx(
-            deadline._timestamp, 1
-        ), "The provided deadline should be recieved serverside"
-        assert (
-            stream.metadata["authorization"] == metadata["authorization"]
-        ), "The provided authorization metadata should be recieved serverside"
-
-    return server_side_test
-
-
-@pytest.mark.asyncio
-async def test_simple_service_call():
-    async with ChannelFor([ThingService()]) as channel:
-        await _test_stub(ThingServiceClient(channel))
-
-
-@pytest.mark.asyncio
-async def test_service_call_with_upfront_request_params():
-    # Setting deadline
-    deadline = grpclib.metadata.Deadline.from_timeout(22)
-    metadata = {"authorization": "12345"}
-    async with ChannelFor(
-        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata))]
-    ) as channel:
-        await _test_stub(
-            ThingServiceClient(channel, deadline=deadline, metadata=metadata)
-        )
-
-    # Setting timeout
-    timeout = 99
-    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
-    metadata = {"authorization": "12345"}
-    async with ChannelFor(
-        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata))]
-    ) as channel:
-        await _test_stub(
-            ThingServiceClient(channel, timeout=timeout, metadata=metadata)
-        )
-
-
-@pytest.mark.asyncio
-async def test_service_call_lower_level_with_overrides():
-    THING_TO_DO = "get milk"
-
-    # Setting deadline
-    deadline = grpclib.metadata.Deadline.from_timeout(22)
-    metadata = {"authorization": "12345"}
-    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(28)
-    kwarg_metadata = {"authorization": "12345"}
-    async with ChannelFor(
-        [ThingService(test_hook=_assert_request_meta_recieved(deadline, metadata))]
-    ) as channel:
-        stub = ThingServiceClient(channel, deadline=deadline, metadata=metadata)
-        response = await stub._unary_unary(
-            "/service.Test/DoThing",
-            DoThingRequest(THING_TO_DO),
-            DoThingResponse,
-            deadline=kwarg_deadline,
-            metadata=kwarg_metadata,
-        )
-        assert response.names == [THING_TO_DO]
-
-    # Setting timeout
-    timeout = 99
-    deadline = grpclib.metadata.Deadline.from_timeout(timeout)
-    metadata = {"authorization": "12345"}
-    kwarg_timeout = 9000
-    kwarg_deadline = grpclib.metadata.Deadline.from_timeout(kwarg_timeout)
-    kwarg_metadata = {"authorization": "09876"}
-    async with ChannelFor(
-        [
-            ThingService(
-                test_hook=_assert_request_meta_recieved(kwarg_deadline, kwarg_metadata)
-            )
-        ]
-    ) as channel:
-        stub = ThingServiceClient(channel, deadline=deadline, metadata=metadata)
-        response = await stub._unary_unary(
-            "/service.Test/DoThing",
-            DoThingRequest(THING_TO_DO),
-            DoThingResponse,
-            timeout=kwarg_timeout,
-            metadata=kwarg_metadata,
-        )
-        assert response.names == [THING_TO_DO]

From 3185c670981de023e400c5e6854231cd29195e12 Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Sun, 7 Jun 2020 17:53:06 +0200
Subject: [PATCH 06/14] Improve generate script

- Fix issue with __pycache__ dirs getting picked up
- parallelise code generation with asyncio for 3x speedup
- silence protoc output unless -v option is supplied
- Use pathlib ;)
---
 betterproto/tests/generate.py    | 114 ++++++++++++++++++++-----------
 betterproto/tests/test_inputs.py |   2 +-
 betterproto/tests/util.py        |  55 +++++++--------
 3 files changed, 99 insertions(+), 72 deletions(-)

diff --git a/betterproto/tests/generate.py b/betterproto/tests/generate.py
index fc85b7f..5c555ff 100644
--- a/betterproto/tests/generate.py
+++ b/betterproto/tests/generate.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
-import glob
+import asyncio
 import os
+from pathlib import Path
 import shutil
 import subprocess
 import sys
@@ -20,58 +21,63 @@ from betterproto.tests.util import (
 os.environ["PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION"] = "python"
 
 
-def clear_directory(path: str):
-    for file_or_directory in glob.glob(os.path.join(path, "*")):
-        if os.path.isdir(file_or_directory):
+def clear_directory(dir_path: Path):
+    for file_or_directory in dir_path.glob("*"):
+        if file_or_directory.is_dir():
             shutil.rmtree(file_or_directory)
         else:
-            os.remove(file_or_directory)
+            file_or_directory.unlink()
 
 
-def generate(whitelist: Set[str]):
-    path_whitelist = {os.path.realpath(e) for e in whitelist if os.path.exists(e)}
-    name_whitelist = {e for e in whitelist if not os.path.exists(e)}
+async def generate(whitelist: Set[str], verbose: bool):
+    test_case_names = set(get_directories(inputs_path)) - {"__pycache__"}
 
-    test_case_names = set(get_directories(inputs_path))
-
-    failed_test_cases = []
+    path_whitelist = set()
+    name_whitelist = set()
+    for item in whitelist:
+        if item in test_case_names:
+            name_whitelist.add(item)
+            continue
+        path_whitelist.add(item)
 
+    generation_tasks = []
     for test_case_name in sorted(test_case_names):
-        test_case_input_path = os.path.realpath(
-            os.path.join(inputs_path, test_case_name)
-        )
-
+        test_case_input_path = inputs_path.joinpath(test_case_name).resolve()
         if (
             whitelist
-            and test_case_input_path not in path_whitelist
+            and str(test_case_input_path) not in path_whitelist
             and test_case_name not in name_whitelist
         ):
             continue
+        generation_tasks.append(
+            generate_test_case_output(test_case_input_path, test_case_name, verbose)
+        )
 
-        print(f"Generating output for {test_case_name}")
-        try:
-            generate_test_case_output(test_case_name, test_case_input_path)
-        except subprocess.CalledProcessError as e:
+    failed_test_cases = []
+    # Wait for all subprocs and match any failures to names to report
+    for test_case_name, result in zip(
+        sorted(test_case_names), await asyncio.gather(*generation_tasks)
+    ):
+        if result != 0:
             failed_test_cases.append(test_case_name)
 
     if failed_test_cases:
-        sys.stderr.write("\nFailed to generate the following test cases:\n")
+        sys.stderr.write(
+            "\n\033[31;1;4mFailed to generate the following test cases:\033[0m\n"
+        )
         for failed_test_case in failed_test_cases:
             sys.stderr.write(f"- {failed_test_case}\n")
 
 
-def generate_test_case_output(test_case_name, test_case_input_path=None):
-    if not test_case_input_path:
-        test_case_input_path = os.path.realpath(
-            os.path.join(inputs_path, test_case_name)
-        )
+async def generate_test_case_output(
+    test_case_input_path: Path, test_case_name: str, verbose: bool
+) -> int:
+    """
+    Returns the max of the subprocess return values
+    """
 
-    test_case_output_path_reference = os.path.join(
-        output_path_reference, test_case_name
-    )
-    test_case_output_path_betterproto = os.path.join(
-        output_path_betterproto, test_case_name
-    )
+    test_case_output_path_reference = output_path_reference.joinpath(test_case_name)
+    test_case_output_path_betterproto = output_path_betterproto.joinpath(test_case_name)
 
     os.makedirs(test_case_output_path_reference, exist_ok=True)
     os.makedirs(test_case_output_path_betterproto, exist_ok=True)
@@ -79,14 +85,36 @@ def generate_test_case_output(test_case_name, test_case_input_path=None):
     clear_directory(test_case_output_path_reference)
     clear_directory(test_case_output_path_betterproto)
 
-    protoc_reference(test_case_input_path, test_case_output_path_reference)
-    protoc_plugin(test_case_input_path, test_case_output_path_betterproto)
+    (
+        (ref_out, ref_err, ref_code),
+        (plg_out, plg_err, plg_code),
+    ) = await asyncio.gather(
+        protoc_reference(test_case_input_path, test_case_output_path_reference),
+        protoc_plugin(test_case_input_path, test_case_output_path_betterproto),
+    )
+
+    message = f"Generated output for {test_case_name!r}"
+    if verbose:
+        print(f"\033[31;1;4m{message}\033[0m")
+        if ref_out:
+            sys.stdout.buffer.write(ref_out)
+        if ref_err:
+            sys.stderr.buffer.write(ref_err)
+        if plg_out:
+            sys.stdout.buffer.write(plg_out)
+        if plg_err:
+            sys.stderr.buffer.write(plg_err)
+        sys.stdout.buffer.flush()
+        sys.stderr.buffer.flush()
+    else:
+        print(message)
+
+    return max(ref_code, plg_code)
 
 
 HELP = "\n".join(
-    [
-        "Usage: python generate.py",
-        "       python generate.py [DIRECTORIES or NAMES]",
+    (
+        "Usage: python generate.py [-h] [-v] [DIRECTORIES or NAMES]",
         "Generate python classes for standard tests.",
         "",
         "DIRECTORIES    One or more relative or absolute directories of test-cases to generate classes for.",
@@ -94,7 +122,7 @@ HELP = "\n".join(
         "",
         "NAMES          One or more test-case names to generate classes for.",
         "               python generate.py bool double enums",
-    ]
+    )
 )
 
 
@@ -102,9 +130,13 @@ def main():
     if set(sys.argv).intersection({"-h", "--help"}):
         print(HELP)
         return
-    whitelist = set(sys.argv[1:])
-
-    generate(whitelist)
+    if sys.argv[1:2] == ["-v"]:
+        verbose = True
+        whitelist = set(sys.argv[2:])
+    else:
+        verbose = False
+        whitelist = set(sys.argv[1:])
+    asyncio.get_event_loop().run_until_complete(generate(whitelist, verbose))
 
 
 if __name__ == "__main__":
diff --git a/betterproto/tests/test_inputs.py b/betterproto/tests/test_inputs.py
index cac8327..5fd3ccc 100644
--- a/betterproto/tests/test_inputs.py
+++ b/betterproto/tests/test_inputs.py
@@ -23,7 +23,7 @@ from google.protobuf.json_format import Parse
 
 class TestCases:
     def __init__(self, path, services: Set[str], xfail: Set[str]):
-        _all = set(get_directories(path))
+        _all = set(get_directories(path)) - {"__pycache__"}
         _services = services
         _messages = _all - services
         _messages_with_json = {
diff --git a/betterproto/tests/util.py b/betterproto/tests/util.py
index a7cff7a..61ba53e 100644
--- a/betterproto/tests/util.py
+++ b/betterproto/tests/util.py
@@ -1,23 +1,24 @@
+import asyncio
 import os
-import subprocess
-from typing import Generator
+from pathlib import Path
+from typing import Generator, IO, Optional
 
 os.environ["PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION"] = "python"
 
-root_path = os.path.dirname(os.path.realpath(__file__))
-inputs_path = os.path.join(root_path, "inputs")
-output_path_reference = os.path.join(root_path, "output_reference")
-output_path_betterproto = os.path.join(root_path, "output_betterproto")
+root_path = Path(__file__).resolve().parent
+inputs_path = root_path.joinpath("inputs")
+output_path_reference = root_path.joinpath("output_reference")
+output_path_betterproto = root_path.joinpath("output_betterproto")
 
 if os.name == "nt":
-    plugin_path = os.path.join(root_path, "..", "plugin.bat")
+    plugin_path = root_path.joinpath("..", "plugin.bat").resolve()
 else:
-    plugin_path = os.path.join(root_path, "..", "plugin.py")
+    plugin_path = root_path.joinpath("..", "plugin.py").resolve()
 
 
-def get_files(path, end: str) -> Generator[str, None, None]:
+def get_files(path, suffix: str) -> Generator[str, None, None]:
     for r, dirs, files in os.walk(path):
-        for filename in [f for f in files if f.endswith(end)]:
+        for filename in [f for f in files if f.endswith(suffix)]:
             yield os.path.join(r, filename)
 
 
@@ -27,36 +28,30 @@ def get_directories(path):
             yield directory
 
 
-def relative(file: str, path: str):
-    return os.path.join(os.path.dirname(file), path)
-
-
-def read_relative(file: str, path: str):
-    with open(relative(file, path)) as fh:
-        return fh.read()
-
-
-def protoc_plugin(path: str, output_dir: str) -> subprocess.CompletedProcess:
-    return subprocess.run(
+async def protoc_plugin(path: str, output_dir: str):
+    proc = await asyncio.create_subprocess_shell(
         f"protoc --plugin=protoc-gen-custom={plugin_path} --custom_out={output_dir} --proto_path={path} {path}/*.proto",
-        shell=True,
-        check=True,
+        stdout=asyncio.subprocess.PIPE,
+        stderr=asyncio.subprocess.PIPE,
     )
+    return (*(await proc.communicate()), proc.returncode)
 
 
-def protoc_reference(path: str, output_dir: str):
-    subprocess.run(
+async def protoc_reference(path: str, output_dir: str):
+    proc = await asyncio.create_subprocess_shell(
         f"protoc --python_out={output_dir} --proto_path={path} {path}/*.proto",
-        shell=True,
+        stdout=asyncio.subprocess.PIPE,
+        stderr=asyncio.subprocess.PIPE,
     )
+    return (*(await proc.communicate()), proc.returncode)
 
 
-def get_test_case_json_data(test_case_name, json_file_name=None):
+def get_test_case_json_data(test_case_name: str, json_file_name: Optional[str] = None):
     test_data_file_name = json_file_name if json_file_name else f"{test_case_name}.json"
-    test_data_file_path = os.path.join(inputs_path, test_case_name, test_data_file_name)
+    test_data_file_path = inputs_path.joinpath(test_case_name, test_data_file_name)
 
-    if not os.path.exists(test_data_file_path):
+    if not test_data_file_path.exists():
         return None
 
-    with open(test_data_file_path) as fh:
+    with test_data_file_path.open("r") as fh:
         return fh.read()

From c8229e53a7b73f60c4d658e512cebb1cf8080a7d Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Sun, 7 Jun 2020 19:10:41 +0200
Subject: [PATCH 07/14] Fix most mypy warnings

---
 betterproto/__init__.py            | 4 ++--
 betterproto/_types.py              | 6 +++++-
 betterproto/grpc/grpclib_client.py | 7 ++++---
 betterproto/plugin.py              | 8 ++++----
 4 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/betterproto/__init__.py b/betterproto/__init__.py
index 6a53d65..c1e60ea 100644
--- a/betterproto/__init__.py
+++ b/betterproto/__init__.py
@@ -440,7 +440,7 @@ class ProtoClassMetadata:
 
     def __init__(self, cls: Type["Message"]):
         by_field = {}
-        by_group = {}
+        by_group: Dict[str, Set] = {}
         by_field_name = {}
         by_field_number = {}
 
@@ -780,7 +780,7 @@ class Message(ABC):
 
     def to_dict(
         self, casing: Casing = Casing.CAMEL, include_default_values: bool = False
-    ) -> dict:
+    ) -> Dict[str, Any]:
         """
         Returns a dict representation of this message instance which can be
         used to serialize to e.g. JSON. Defaults to camel casing for
diff --git a/betterproto/_types.py b/betterproto/_types.py
index 0ff23e4..d03432c 100644
--- a/betterproto/_types.py
+++ b/betterproto/_types.py
@@ -1,4 +1,8 @@
-from typing import TypeVar
+from typing import TYPE_CHECKING, TypeVar
+
+if TYPE_CHECKING:
+    from . import Message
+    from grpclib._protocols import IProtoMessage
 
 # Bound type variable to allow methods to return `self` of subclasses
 T = TypeVar("T", bound="Message")
diff --git a/betterproto/grpc/grpclib_client.py b/betterproto/grpc/grpclib_client.py
index 7218574..7f48fb9 100644
--- a/betterproto/grpc/grpclib_client.py
+++ b/betterproto/grpc/grpclib_client.py
@@ -3,9 +3,10 @@ import asyncio
 import grpclib.const
 from typing import (
     Any,
+    AsyncIterable,
     AsyncIterator,
     Collection,
-    Iterator,
+    Iterable,
     Mapping,
     Optional,
     Tuple,
@@ -23,7 +24,7 @@ if TYPE_CHECKING:
 
 _Value = Union[str, bytes]
 _MetadataLike = Union[Mapping[str, _Value], Collection[Tuple[str, _Value]]]
-_MessageSource = Union[Iterator["IProtoMessage"], AsyncIterator["IProtoMessage"]]
+_MessageSource = Union[Iterable["IProtoMessage"], AsyncIterable["IProtoMessage"]]
 
 
 class ServiceStub(ABC):
@@ -160,7 +161,7 @@ class ServiceStub(ABC):
 
     @staticmethod
     async def _send_messages(stream, messages: _MessageSource):
-        if hasattr(messages, "__aiter__"):
+        if isinstance(messages, AsyncIterable):
             async for message in messages:
                 await stream.send_message(message)
         else:
diff --git a/betterproto/plugin.py b/betterproto/plugin.py
index 85fd905..ed14e00 100755
--- a/betterproto/plugin.py
+++ b/betterproto/plugin.py
@@ -6,10 +6,10 @@ import re
 import stringcase
 import sys
 import textwrap
-from typing import List
+from typing import List, Union
+import betterproto
 from betterproto.casing import safe_snake_case
 from betterproto.compile.importing import get_ref_type
-import betterproto
 
 try:
     # betterproto[compiler] specific dependencies
@@ -58,8 +58,8 @@ def py_type(
         raise NotImplementedError(f"Unknown type {descriptor.type}")
 
 
-def get_py_zero(type_num: int) -> str:
-    zero = 0
+def get_py_zero(type_num: int) -> Union[str, float]:
+    zero: Union[str, float] = 0
     if type_num in []:
         zero = 0.0
     elif type_num == 8:

From 159c30ddd8917a14a56c65b96c400fd4b9c90f5d Mon Sep 17 00:00:00 2001
From: boukeversteegh <info@boukeversteegh.nl>
Date: Mon, 15 Jun 2020 18:02:05 +0200
Subject: [PATCH 08/14] Fix close not awaitable, fix done is callable, fix
 return async next value

---
 betterproto/grpc/util/async_channel.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/betterproto/grpc/util/async_channel.py b/betterproto/grpc/util/async_channel.py
index 7e83c94..3a104ca 100644
--- a/betterproto/grpc/util/async_channel.py
+++ b/betterproto/grpc/util/async_channel.py
@@ -100,13 +100,14 @@ class AsyncChannel(AsyncIterable[T]):
         return self
 
     async def __anext__(self) -> T:
-        if self.done:
+        if self.done():
             raise StopAsyncIteration
         self._waiting_recievers += 1
         try:
             result = await self._queue.get()
             if result is self.__flush:
                 raise StopAsyncIteration
+            return result
         finally:
             self._waiting_recievers -= 1
             self._queue.task_done()
@@ -151,7 +152,7 @@ class AsyncChannel(AsyncIterable[T]):
                 await self._queue.put(item)
         if close:
             # Complete the closing process
-            await self.close()
+            self.close()
 
     async def send(self, item: T):
         """
@@ -168,7 +169,7 @@ class AsyncChannel(AsyncIterable[T]):
         or None if the channel is closed before another item is sent.
         :return: An item from the channel
         """
-        if self.done:
+        if self.done():
             raise ChannelDone("Cannot recieve from a closed channel")
         self._waiting_recievers += 1
         try:

From f7aa6150e25368d2c6be75e661fa2afe52eb05e0 Mon Sep 17 00:00:00 2001
From: boukeversteegh <info@boukeversteegh.nl>
Date: Mon, 15 Jun 2020 18:02:37 +0200
Subject: [PATCH 09/14] Add test-cases for client stream-stream

---
 betterproto/tests/grpc/test_stream_stream.py | 124 +++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 betterproto/tests/grpc/test_stream_stream.py

diff --git a/betterproto/tests/grpc/test_stream_stream.py b/betterproto/tests/grpc/test_stream_stream.py
new file mode 100644
index 0000000..5768189
--- /dev/null
+++ b/betterproto/tests/grpc/test_stream_stream.py
@@ -0,0 +1,124 @@
+import asyncio
+from dataclasses import dataclass
+from typing import AsyncIterator
+
+import pytest
+
+import betterproto
+from betterproto.grpc.util.async_channel import AsyncChannel
+
+
+@dataclass
+class Message(betterproto.Message):
+    body: str = betterproto.string_field(1)
+
+
+async def to_list(generator: AsyncIterator):
+    lis = []
+    async for value in generator:
+        lis.append(value)
+    return lis
+
+
+@pytest.fixture
+def expected_responses():
+    return [Message("Hello world 1"), Message("Hello world 2"), Message("Done")]
+
+
+class ClientStub:
+    async def connect(self, requests):
+        await asyncio.sleep(0.1)
+        async for request in requests:
+            await asyncio.sleep(0.1)
+            yield request
+        await asyncio.sleep(0.1)
+        yield Message("Done")
+
+
+@pytest.fixture
+def client():
+    # channel = Channel(host='127.0.0.1', port=50051)
+    # return ClientStub(channel)
+    return ClientStub()
+
+
+@pytest.mark.asyncio
+async def test_from_list_close_automatically(client, expected_responses):
+    requests = AsyncChannel(
+        [Message(body="Hello world 1"), Message(body="Hello world 2")], close=True
+    )
+
+    responses = client.connect(requests)
+
+    assert await to_list(responses) == expected_responses
+
+
+@pytest.mark.asyncio
+async def test_from_list_close_manually_immediately(client, expected_responses):
+    requests = AsyncChannel(
+        [Message(body="Hello world 1"), Message(body="Hello world 2")], close=False
+    )
+
+    requests.close()
+
+    responses = client.connect(requests)
+
+    assert await to_list(responses) == expected_responses
+
+
+@pytest.mark.asyncio
+async def test_from_list_close_manually_after_connect(client, expected_responses):
+    requests = AsyncChannel(
+        [Message(body="Hello world 1"), Message(body="Hello world 2")], close=False
+    )
+
+    responses = client.connect(requests)
+
+    requests.close()
+
+    assert await to_list(responses) == expected_responses
+
+
+@pytest.mark.asyncio
+async def test_send_from_before_connect_and_close_automatically(
+    client, expected_responses
+):
+    requests = AsyncChannel()
+
+    await requests.send_from(
+        [Message(body="Hello world 1"), Message(body="Hello world 2")], close=True
+    )
+
+    responses = client.connect(requests)
+
+    assert await to_list(responses) == expected_responses
+
+
+@pytest.mark.asyncio
+async def test_send_from_after_connect_and_close_automatically(
+    client, expected_responses
+):
+    requests = AsyncChannel()
+
+    responses = client.connect(requests)
+
+    await requests.send_from(
+        [Message(body="Hello world 1"), Message(body="Hello world 2")], close=True
+    )
+
+    assert await to_list(responses) == expected_responses
+
+
+@pytest.mark.asyncio
+async def test_send_from_close_manually_immediately(client, expected_responses):
+    requests = AsyncChannel()
+
+    responses = client.connect(requests)
+
+    await requests.send_from(
+        [Message(body="Hello world 1"), Message(body="Hello world 2")], close=False
+    )
+
+    requests.close()
+
+    assert await to_list(responses) == expected_responses

From 0814729c5af0f96ad933ae0e72c695fd0dce8d41 Mon Sep 17 00:00:00 2001
From: boukeversteegh <info@boukeversteegh.nl>
Date: Mon, 15 Jun 2020 18:14:13 +0200
Subject: [PATCH 10/14] Add cases for send()

---
 betterproto/tests/grpc/test_stream_stream.py | 43 ++++++++++++++++----
 1 file changed, 35 insertions(+), 8 deletions(-)

diff --git a/betterproto/tests/grpc/test_stream_stream.py b/betterproto/tests/grpc/test_stream_stream.py
index 5768189..3c2c7e2 100644
--- a/betterproto/tests/grpc/test_stream_stream.py
+++ b/betterproto/tests/grpc/test_stream_stream.py
@@ -13,20 +13,13 @@ class Message(betterproto.Message):
     body: str = betterproto.string_field(1)
 
 
-async def to_list(generator: AsyncIterator):
-    lis = []
-    async for value in generator:
-        lis.append(value)
-    return lis
-
-
 @pytest.fixture
 def expected_responses():
     return [Message("Hello world 1"), Message("Hello world 2"), Message("Done")]
 
 
 class ClientStub:
-    async def connect(self, requests):
+    async def connect(self, requests: AsyncIterator):
         await asyncio.sleep(0.1)
         async for request in requests:
             await asyncio.sleep(0.1)
@@ -35,6 +28,13 @@ class ClientStub:
         yield Message("Done")
 
 
+async def to_list(generator: AsyncIterator):
+    lis = []
+    async for value in generator:
+        lis.append(value)
+    return lis
+
+
 @pytest.fixture
 def client():
     # channel = Channel(host='127.0.0.1', port=50051)
@@ -122,3 +122,30 @@ async def test_send_from_close_manually_immediately(client, expected_responses):
     requests.close()
 
     assert await to_list(responses) == expected_responses
+
+
+@pytest.mark.asyncio
+async def test_send_individually_and_close_before_connect(client, expected_responses):
+    requests = AsyncChannel()
+
+    await requests.send(Message(body="Hello world 1"))
+    await requests.send(Message(body="Hello world 2"))
+    requests.close()
+
+    responses = client.connect(requests)
+
+    assert await to_list(responses) == expected_responses
+
+
+@pytest.mark.asyncio
+async def test_send_individually_and_close_after_connect(client, expected_responses):
+    requests = AsyncChannel()
+
+    await requests.send(Message(body="Hello world 1"))
+    await requests.send(Message(body="Hello world 2"))
+
+    responses = client.connect(requests)
+
+    requests.close()
+
+    assert await to_list(responses) == expected_responses

From 50bb67bf5dca04ded331adbcdcedab3aed7d7de1 Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Mon, 15 Jun 2020 23:35:56 +0200
Subject: [PATCH 11/14] Fix bugs and remove footgun feature in AsyncChannel

---
 betterproto/grpc/util/async_channel.py        | 24 +++++++------------
 betterproto/tests/grpc/test_grpclib_client.py | 22 ++++++++++-------
 2 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/betterproto/grpc/util/async_channel.py b/betterproto/grpc/util/async_channel.py
index 7e83c94..fd0ecc2 100644
--- a/betterproto/grpc/util/async_channel.py
+++ b/betterproto/grpc/util/async_channel.py
@@ -81,17 +81,10 @@ class AsyncChannel(AsyncIterable[T]):
     """
 
     def __init__(
-        self,
-        source: Union[Iterable[T], AsyncIterable[T]] = tuple(),
-        *,
-        buffer_limit: int = 0,
-        close: bool = False,
+        self, *, buffer_limit: int = 0, close: bool = False,
     ):
         self._queue: asyncio.Queue[Union[T, object]] = asyncio.Queue(buffer_limit)
         self._closed = False
-        self._sending_task = (
-            asyncio.ensure_future(self.send_from(source, close)) if source else None
-        )
         self._waiting_recievers: int = 0
         # Track whether flush has been invoked so it can only happen once
         self._flushed = False
@@ -100,13 +93,14 @@ class AsyncChannel(AsyncIterable[T]):
         return self
 
     async def __anext__(self) -> T:
-        if self.done:
+        if self.done():
             raise StopAsyncIteration
         self._waiting_recievers += 1
         try:
             result = await self._queue.get()
             if result is self.__flush:
                 raise StopAsyncIteration
+            return result
         finally:
             self._waiting_recievers -= 1
             self._queue.task_done()
@@ -131,7 +125,7 @@ class AsyncChannel(AsyncIterable[T]):
 
     async def send_from(
         self, source: Union[Iterable[T], AsyncIterable[T]], close: bool = False
-    ):
+    ) -> "AsyncChannel[T]":
         """
         Iterates the given [Async]Iterable and sends all the resulting items.
         If close is set to True then subsequent send calls will be rejected with a
@@ -151,9 +145,10 @@ class AsyncChannel(AsyncIterable[T]):
                 await self._queue.put(item)
         if close:
             # Complete the closing process
-            await self.close()
+            self.close()
+        return self
 
-    async def send(self, item: T):
+    async def send(self, item: T) -> "AsyncChannel[T]":
         """
         Send a single item over this channel.
         :param item: The item to send
@@ -161,6 +156,7 @@ class AsyncChannel(AsyncIterable[T]):
         if self._closed:
             raise ChannelClosed("Cannot send through a closed channel")
         await self._queue.put(item)
+        return self
 
     async def recieve(self) -> Optional[T]:
         """
@@ -168,7 +164,7 @@ class AsyncChannel(AsyncIterable[T]):
         or None if the channel is closed before another item is sent.
         :return: An item from the channel
         """
-        if self.done:
+        if self.done():
             raise ChannelDone("Cannot recieve from a closed channel")
         self._waiting_recievers += 1
         try:
@@ -184,8 +180,6 @@ class AsyncChannel(AsyncIterable[T]):
         """
         Close this channel to new items
         """
-        if self._sending_task is not None:
-            self._sending_task.cancel()
         self._closed = True
         asyncio.ensure_future(self._flush_queue())
 
diff --git a/betterproto/tests/grpc/test_grpclib_client.py b/betterproto/tests/grpc/test_grpclib_client.py
index dc57fe4..6c34ece 100644
--- a/betterproto/tests/grpc/test_grpclib_client.py
+++ b/betterproto/tests/grpc/test_grpclib_client.py
@@ -1,3 +1,4 @@
+import asyncio
 from betterproto.tests.output_betterproto.service.service import (
     DoThingResponse,
     DoThingRequest,
@@ -129,7 +130,10 @@ async def test_async_gen_for_stream_stream_request():
         # Use an AsyncChannel to decouple sending and recieving, it'll send some_things
         # immediately and we'll use it to send more_things later, after recieving some
         # results
-        request_chan = AsyncChannel(GetThingRequest(name) for name in some_things)
+        request_chan = AsyncChannel()
+        send_initial_requests = asyncio.ensure_future(
+            request_chan.send_from(GetThingRequest(name) for name in some_things)
+        )
         response_index = 0
         async for response in client.get_different_things(request_chan):
             assert response.name == expected_things[response_index]
@@ -138,13 +142,13 @@ async def test_async_gen_for_stream_stream_request():
             if more_things:
                 # Send some more requests as we recieve reponses to be sure coordination of
                 # send/recieve events doesn't matter
-                another_response = await request_chan.send(
-                    GetThingRequest(more_things.pop(0))
-                )
-                if another_response is not None:
-                    assert another_response.name == expected_things[response_index]
-                    assert another_response.version == response_index
-                    response_index += 1
+                await request_chan.send(GetThingRequest(more_things.pop(0)))
+            elif not send_initial_requests.done():
+                # Make sure the sending task it completed
+                await send_initial_requests
             else:
                 # No more things to send make sure channel is closed
-                await request_chan.close()
+                request_chan.close()
+        assert response_index == len(
+            expected_things
+        ), "Didn't recieve all exptected responses"

From e1ccd540a9e00ff60e519e9ed2048366628c2a02 Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Mon, 15 Jun 2020 23:35:56 +0200
Subject: [PATCH 12/14] Fix bugs and remove footgun feature in AsyncChannel

---
 betterproto/grpc/util/async_channel.py        | 32 ++++++++-----------
 betterproto/tests/grpc/test_grpclib_client.py | 22 +++++++------
 2 files changed, 26 insertions(+), 28 deletions(-)

diff --git a/betterproto/grpc/util/async_channel.py b/betterproto/grpc/util/async_channel.py
index 7e83c94..de020a6 100644
--- a/betterproto/grpc/util/async_channel.py
+++ b/betterproto/grpc/util/async_channel.py
@@ -30,14 +30,15 @@ class ChannelDone(Exception):
 
 class AsyncChannel(AsyncIterable[T]):
     """
-    A buffered async channel for sending items between coroutines with FIFO semantics.
+    A buffered async channel for sending items between coroutines with FIFO ordering.
 
     This makes decoupled bidirection steaming gRPC requests easy if used like:
 
     .. code-block:: python
         client = GeneratedStub(grpclib_chan)
-        # The channel can be initialised with items to send immediately
-        request_chan = AsyncChannel([ReqestObject(...), ReqestObject(...)])
+        request_chan = await AsyncChannel()
+        # We can start be sending all the requests we already have
+        await request_chan.send_from([ReqestObject(...), ReqestObject(...)])
         async for response in client.rpc_call(request_chan):
             # The response iterator will remain active until the connection is closed
             ...
@@ -48,7 +49,6 @@ class AsyncChannel(AsyncIterable[T]):
             request_chan.close()
 
     Items can be sent through the channel by either:
-    - providing an iterable to the constructor
     - providing an iterable to the send_from method
     - passing them to the send method one at a time
 
@@ -81,17 +81,10 @@ class AsyncChannel(AsyncIterable[T]):
     """
 
     def __init__(
-        self,
-        source: Union[Iterable[T], AsyncIterable[T]] = tuple(),
-        *,
-        buffer_limit: int = 0,
-        close: bool = False,
+        self, *, buffer_limit: int = 0, close: bool = False,
     ):
         self._queue: asyncio.Queue[Union[T, object]] = asyncio.Queue(buffer_limit)
         self._closed = False
-        self._sending_task = (
-            asyncio.ensure_future(self.send_from(source, close)) if source else None
-        )
         self._waiting_recievers: int = 0
         # Track whether flush has been invoked so it can only happen once
         self._flushed = False
@@ -100,13 +93,14 @@ class AsyncChannel(AsyncIterable[T]):
         return self
 
     async def __anext__(self) -> T:
-        if self.done:
+        if self.done():
             raise StopAsyncIteration
         self._waiting_recievers += 1
         try:
             result = await self._queue.get()
             if result is self.__flush:
                 raise StopAsyncIteration
+            return result
         finally:
             self._waiting_recievers -= 1
             self._queue.task_done()
@@ -131,7 +125,7 @@ class AsyncChannel(AsyncIterable[T]):
 
     async def send_from(
         self, source: Union[Iterable[T], AsyncIterable[T]], close: bool = False
-    ):
+    ) -> "AsyncChannel[T]":
         """
         Iterates the given [Async]Iterable and sends all the resulting items.
         If close is set to True then subsequent send calls will be rejected with a
@@ -151,9 +145,10 @@ class AsyncChannel(AsyncIterable[T]):
                 await self._queue.put(item)
         if close:
             # Complete the closing process
-            await self.close()
+            self.close()
+        return self
 
-    async def send(self, item: T):
+    async def send(self, item: T) -> "AsyncChannel[T]":
         """
         Send a single item over this channel.
         :param item: The item to send
@@ -161,6 +156,7 @@ class AsyncChannel(AsyncIterable[T]):
         if self._closed:
             raise ChannelClosed("Cannot send through a closed channel")
         await self._queue.put(item)
+        return self
 
     async def recieve(self) -> Optional[T]:
         """
@@ -168,7 +164,7 @@ class AsyncChannel(AsyncIterable[T]):
         or None if the channel is closed before another item is sent.
         :return: An item from the channel
         """
-        if self.done:
+        if self.done():
             raise ChannelDone("Cannot recieve from a closed channel")
         self._waiting_recievers += 1
         try:
@@ -184,8 +180,6 @@ class AsyncChannel(AsyncIterable[T]):
         """
         Close this channel to new items
         """
-        if self._sending_task is not None:
-            self._sending_task.cancel()
         self._closed = True
         asyncio.ensure_future(self._flush_queue())
 
diff --git a/betterproto/tests/grpc/test_grpclib_client.py b/betterproto/tests/grpc/test_grpclib_client.py
index dc57fe4..6c34ece 100644
--- a/betterproto/tests/grpc/test_grpclib_client.py
+++ b/betterproto/tests/grpc/test_grpclib_client.py
@@ -1,3 +1,4 @@
+import asyncio
 from betterproto.tests.output_betterproto.service.service import (
     DoThingResponse,
     DoThingRequest,
@@ -129,7 +130,10 @@ async def test_async_gen_for_stream_stream_request():
         # Use an AsyncChannel to decouple sending and recieving, it'll send some_things
         # immediately and we'll use it to send more_things later, after recieving some
         # results
-        request_chan = AsyncChannel(GetThingRequest(name) for name in some_things)
+        request_chan = AsyncChannel()
+        send_initial_requests = asyncio.ensure_future(
+            request_chan.send_from(GetThingRequest(name) for name in some_things)
+        )
         response_index = 0
         async for response in client.get_different_things(request_chan):
             assert response.name == expected_things[response_index]
@@ -138,13 +142,13 @@ async def test_async_gen_for_stream_stream_request():
             if more_things:
                 # Send some more requests as we recieve reponses to be sure coordination of
                 # send/recieve events doesn't matter
-                another_response = await request_chan.send(
-                    GetThingRequest(more_things.pop(0))
-                )
-                if another_response is not None:
-                    assert another_response.name == expected_things[response_index]
-                    assert another_response.version == response_index
-                    response_index += 1
+                await request_chan.send(GetThingRequest(more_things.pop(0)))
+            elif not send_initial_requests.done():
+                # Make sure the sending task it completed
+                await send_initial_requests
             else:
                 # No more things to send make sure channel is closed
-                await request_chan.close()
+                request_chan.close()
+        assert response_index == len(
+            expected_things
+        ), "Didn't recieve all exptected responses"

From 75a4c230daf61affc324d103ea27d1cd5b75494f Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Mon, 22 Jun 2020 19:27:57 +0200
Subject: [PATCH 13/14] Add optional deps to dev-deps

So contributors dont have to remember to run poetry install with `-E compiler`
---
 .github/workflows/ci.yml |   4 +-
 Makefile                 |   5 +-
 poetry.lock              | 298 +++++++++++++++++++++++++++++++--------
 pyproject.toml           |   5 +-
 4 files changed, 243 insertions(+), 69 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 30da576..e87de5a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
           python-version: 3.7
       - uses: Gr1N/setup-poetry@v2
       - name: Install dependencies
-        run: make setup
+        run: poetry install
       - name: Run black
         run: make check-style
 
@@ -34,7 +34,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt install protobuf-compiler libprotobuf-dev
-          make setup
+          poetry install
       - name: Run tests
         run: make full-test
 
diff --git a/Makefile b/Makefile
index b4c99a9..efdd69c 100644
--- a/Makefile
+++ b/Makefile
@@ -3,10 +3,7 @@ help:               ##	- Show this help.
 
 # Dev workflow tasks
 
-setup:              ##	- Setup the virtualenv with poetry
-	poetry install -E compiler
-
-generate:           ##	- Generate test cases (do this once before running test)
+generate:           ## - Generate test cases (do this once before running test)
 	poetry run ./betterproto/tests/generate.py
 
 test:               ##	- Run tests
diff --git a/poetry.lock b/poetry.lock
index 25fc2dd..6afb23f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -42,7 +42,7 @@ version = "1.0.0"
 category = "main"
 description = "The uncompromising code formatter."
 name = "black"
-optional = true
+optional = false
 python-versions = ">=3.6"
 version = "19.10b0"
 
@@ -58,11 +58,58 @@ typed-ast = ">=1.4.0"
 [package.extras]
 d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
+[[package]]
+category = "dev"
+description = "A thin, practical wrapper around terminal coloring, styling, and positioning"
+name = "blessings"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.7"
+
+[package.dependencies]
+six = "*"
+
+[[package]]
+category = "dev"
+description = "Fancy Interface to the Python Interpreter"
+name = "bpython"
+optional = false
+python-versions = "*"
+version = "0.19"
+
+[package.dependencies]
+curtsies = ">=0.1.18"
+greenlet = "*"
+pygments = "*"
+requests = "*"
+six = ">=1.5"
+
+[package.extras]
+jedi = ["jedi"]
+urwid = ["urwid"]
+watch = ["watchdog"]
+
+[[package]]
+category = "dev"
+description = "Python package for providing Mozilla's CA Bundle."
+name = "certifi"
+optional = false
+python-versions = "*"
+version = "2020.6.20"
+
+[[package]]
+category = "dev"
+description = "Universal encoding detector for Python 2 and 3"
+name = "chardet"
+optional = false
+python-versions = "*"
+version = "3.0.4"
+
 [[package]]
 category = "main"
 description = "Composable command line interface toolkit"
 name = "click"
-optional = true
+optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 version = "7.1.2"
 
@@ -86,10 +133,22 @@ version = "5.1"
 [package.extras]
 toml = ["toml"]
 
+[[package]]
+category = "dev"
+description = "Curses-like terminal wrapper, with colored strings!"
+name = "curtsies"
+optional = false
+python-versions = "*"
+version = "0.3.1"
+
+[package.dependencies]
+blessings = ">=1.5"
+wcwidth = ">=0.1.4"
+
 [[package]]
 category = "main"
 description = "A backport of the dataclasses module for Python 3.6"
-marker = "python_version >= \"3.6\" and python_version < \"3.7\""
+marker = "python_version >= \"3.6\" and python_version < \"3.7\" or python_version < \"3.7\""
 name = "dataclasses"
 optional = false
 python-versions = ">=3.6, <3.7"
@@ -111,18 +170,30 @@ optional = false
 python-versions = "*"
 version = "3.0.12"
 
+[[package]]
+category = "dev"
+description = "Lightweight in-process concurrent programming"
+name = "greenlet"
+optional = false
+python-versions = "*"
+version = "0.4.16"
+
 [[package]]
 category = "main"
 description = "Pure-Python gRPC implementation for asyncio"
 name = "grpclib"
 optional = false
 python-versions = ">=3.6"
-version = "0.3.1"
+version = "0.3.2"
 
 [package.dependencies]
 h2 = "*"
 multidict = "*"
 
+[package.dependencies.dataclasses]
+python = "<3.7"
+version = "*"
+
 [[package]]
 category = "main"
 description = "HTTP/2 State-Machine based protocol implementation"
@@ -151,6 +222,14 @@ optional = false
 python-versions = "*"
 version = "5.2.0"
 
+[[package]]
+category = "dev"
+description = "Internationalized Domain Names in Applications (IDNA)"
+name = "idna"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.9"
+
 [[package]]
 category = "dev"
 description = "Read metadata from Python packages"
@@ -158,14 +237,14 @@ marker = "python_version < \"3.8\""
 name = "importlib-metadata"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.6.0"
+version = "1.6.1"
 
 [package.dependencies]
 zipp = ">=0.5"
 
 [package.extras]
 docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "importlib-resources"]
+testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
 category = "dev"
@@ -174,7 +253,7 @@ marker = "python_version < \"3.7\""
 name = "importlib-resources"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.5.0"
+version = "2.0.1"
 
 [package.dependencies]
 [package.dependencies.importlib-metadata]
@@ -216,7 +295,7 @@ description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
 optional = false
 python-versions = ">=3.5"
-version = "8.3.0"
+version = "8.4.0"
 
 [[package]]
 category = "main"
@@ -266,7 +345,7 @@ six = "*"
 category = "main"
 description = "Utility library for gitignore style pattern matching of file paths."
 name = "pathspec"
-optional = true
+optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 version = "0.8.0"
 
@@ -304,7 +383,15 @@ description = "library with cross-python path, ini-parsing, io, code, log facili
 name = "py"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.8.1"
+version = "1.8.2"
+
+[[package]]
+category = "dev"
+description = "Pygments is a syntax highlighting package written in Python."
+name = "pygments"
+optional = false
+python-versions = ">=3.5"
+version = "2.6.1"
 
 [[package]]
 category = "dev"
@@ -320,7 +407,7 @@ description = "pytest: simple powerful testing with Python"
 name = "pytest"
 optional = false
 python-versions = ">=3.5"
-version = "5.4.2"
+version = "5.4.3"
 
 [package.dependencies]
 atomicwrites = ">=1.0"
@@ -360,11 +447,11 @@ description = "Pytest plugin for measuring coverage."
 name = "pytest-cov"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.9.0"
+version = "2.10.0"
 
 [package.dependencies]
 coverage = ">=4.4"
-pytest = ">=3.6"
+pytest = ">=4.6"
 
 [package.extras]
 testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "pytest-xdist", "virtualenv"]
@@ -373,9 +460,27 @@ testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "pytest-xdist", "
 category = "main"
 description = "Alternative regular expression module, to replace re."
 name = "regex"
-optional = true
+optional = false
 python-versions = "*"
-version = "2020.5.14"
+version = "2020.6.8"
+
+[[package]]
+category = "dev"
+description = "Python HTTP for Humans."
+name = "requests"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "2.24.0"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+chardet = ">=3.0.2,<4"
+idna = ">=2.5,<3"
+urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
+
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
 
 [[package]]
 category = "main"
@@ -407,7 +512,7 @@ description = "tox is a generic virtualenv management and test command line tool
 name = "tox"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "3.15.1"
+version = "3.15.2"
 
 [package.dependencies]
 colorama = ">=0.4.1"
@@ -443,13 +548,26 @@ optional = false
 python-versions = "*"
 version = "3.7.4.2"
 
+[[package]]
+category = "dev"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+name = "urllib3"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+version = "1.25.9"
+
+[package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+
 [[package]]
 category = "dev"
 description = "Virtual Python Environment builder"
 name = "virtualenv"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-version = "20.0.21"
+version = "20.0.23"
 
 [package.dependencies]
 appdirs = ">=1.4.3,<2"
@@ -463,19 +581,19 @@ version = ">=0.12,<2"
 
 [package.dependencies.importlib-resources]
 python = "<3.7"
-version = ">=1.0,<2"
+version = ">=1.0"
 
 [package.extras]
 docs = ["sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)", "proselint (>=0.10.2)"]
-testing = ["pytest (>=4)", "coverage (>=5)", "coverage-enable-subprocess (>=1)", "pytest-xdist (>=1.31.0)", "pytest-mock (>=2)", "pytest-env (>=0.6.2)", "pytest-randomly (>=1)", "pytest-timeout", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
+testing = ["pytest (>=4)", "coverage (>=5)", "coverage-enable-subprocess (>=1)", "pytest-xdist (>=1.31.0)", "pytest-mock (>=2)", "pytest-env (>=0.6.2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "flaky (>=3)", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
 
 [[package]]
 category = "dev"
-description = "Measures number of Terminal column cells of wide-character codes"
+description = "Measures the displayed width of unicode strings in a terminal"
 name = "wcwidth"
 optional = false
 python-versions = "*"
-version = "0.1.9"
+version = "0.2.4"
 
 [[package]]
 category = "dev"
@@ -494,7 +612,7 @@ testing = ["jaraco.itertools", "func-timeout"]
 compiler = ["black", "jinja2", "protobuf"]
 
 [metadata]
-content-hash = "9761ca0d15bdc43e1a8d0013a79e8bc274b9a213f0a271b2c71912a65e0d7d54"
+content-hash = "ecafcaed2d4a25c2829e6dc3ef3c56cd72a8bc28c25c7aeae3484c978c816722"
 python-versions = "^3.6"
 
 [metadata.files]
@@ -517,6 +635,23 @@ black = [
     {file = "black-19.10b0-py36-none-any.whl", hash = "sha256:1b30e59be925fafc1ee4565e5e08abef6b03fe455102883820fe5ee2e4734e0b"},
     {file = "black-19.10b0.tar.gz", hash = "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"},
 ]
+blessings = [
+    {file = "blessings-1.7-py2-none-any.whl", hash = "sha256:caad5211e7ba5afe04367cdd4cfc68fa886e2e08f6f35e76b7387d2109ccea6e"},
+    {file = "blessings-1.7-py3-none-any.whl", hash = "sha256:b1fdd7e7a675295630f9ae71527a8ebc10bfefa236b3d6aa4932ee4462c17ba3"},
+    {file = "blessings-1.7.tar.gz", hash = "sha256:98e5854d805f50a5b58ac2333411b0482516a8210f23f43308baeb58d77c157d"},
+]
+bpython = [
+    {file = "bpython-0.19-py2.py3-none-any.whl", hash = "sha256:95d95783bfadfa0a25300a648de5aba4423b0ee76b034022a81dde2b5e853c00"},
+    {file = "bpython-0.19.tar.gz", hash = "sha256:476ce09a896c4d34bf5e56aca64650c56fdcfce45781a20dc1521221df8cc49c"},
+]
+certifi = [
+    {file = "certifi-2020.6.20-py2.py3-none-any.whl", hash = "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"},
+    {file = "certifi-2020.6.20.tar.gz", hash = "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3"},
+]
+chardet = [
+    {file = "chardet-3.0.4-py2.py3-none-any.whl", hash = "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"},
+    {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
+]
 click = [
     {file = "click-7.1.2-py2.py3-none-any.whl", hash = "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"},
     {file = "click-7.1.2.tar.gz", hash = "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a"},
@@ -558,6 +693,10 @@ coverage = [
     {file = "coverage-5.1-cp39-cp39-win_amd64.whl", hash = "sha256:bb28a7245de68bf29f6fb199545d072d1036a1917dca17a1e75bbb919e14ee8e"},
     {file = "coverage-5.1.tar.gz", hash = "sha256:f90bfc4ad18450c80b024036eaf91e4a246ae287701aaa88eaebebf150868052"},
 ]
+curtsies = [
+    {file = "curtsies-0.3.1-py2.py3-none-any.whl", hash = "sha256:9169d734323a1356e7563b1ca0bff3c5358c1b1dcce52506a9d4d8ab8a8f5604"},
+    {file = "curtsies-0.3.1.tar.gz", hash = "sha256:b2c913a8113c4382e1a221679f2338139b112839deb16c00ee873e57a4b33bd4"},
+]
 dataclasses = [
     {file = "dataclasses-0.7-py3-none-any.whl", hash = "sha256:3459118f7ede7c8bea0fe795bff7c6c2ce287d01dd226202f7c9ebc0610a7836"},
     {file = "dataclasses-0.7.tar.gz", hash = "sha256:494a6dcae3b8bcf80848eea2ef64c0cc5cd307ffc263e17cdf42f3e5420808e6"},
@@ -569,8 +708,27 @@ filelock = [
     {file = "filelock-3.0.12-py3-none-any.whl", hash = "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"},
     {file = "filelock-3.0.12.tar.gz", hash = "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59"},
 ]
+greenlet = [
+    {file = "greenlet-0.4.16-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:80cb0380838bf4e48da6adedb0c7cd060c187bb4a75f67a5aa9ec33689b84872"},
+    {file = "greenlet-0.4.16-cp27-cp27m-win32.whl", hash = "sha256:df7de669cbf21de4b04a3ffc9920bc8426cab4c61365fa84d79bf97401a8bef7"},
+    {file = "greenlet-0.4.16-cp27-cp27m-win_amd64.whl", hash = "sha256:1429dc183b36ec972055e13250d96e174491559433eb3061691b446899b87384"},
+    {file = "greenlet-0.4.16-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:5ea034d040e6ab1d2ae04ab05a3f37dbd719c4dee3804b13903d4cc794b1336e"},
+    {file = "greenlet-0.4.16-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:c196a5394c56352e21cb7224739c6dd0075b69dd56f758505951d1d8d68cf8a9"},
+    {file = "greenlet-0.4.16-cp35-cp35m-win32.whl", hash = "sha256:1000038ba0ea9032948e2156a9c15f5686f36945e8f9906e6b8db49f358e7b52"},
+    {file = "greenlet-0.4.16-cp35-cp35m-win_amd64.whl", hash = "sha256:1b805231bfb7b2900a16638c3c8b45c694334c811f84463e52451e00c9412691"},
+    {file = "greenlet-0.4.16-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:e5db19d4a7d41bbeb3dd89b49fc1bc7e6e515b51bbf32589c618655a0ebe0bf0"},
+    {file = "greenlet-0.4.16-cp36-cp36m-win32.whl", hash = "sha256:eac2a3f659d5f41d6bbfb6a97733bc7800ea5e906dc873732e00cebb98cec9e4"},
+    {file = "greenlet-0.4.16-cp36-cp36m-win_amd64.whl", hash = "sha256:7eed31f4efc8356e200568ba05ad645525f1fbd8674f1e5be61a493e715e3873"},
+    {file = "greenlet-0.4.16-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:682328aa576ec393c1872615bcb877cf32d800d4a2f150e1a5dc7e56644010b1"},
+    {file = "greenlet-0.4.16-cp37-cp37m-win32.whl", hash = "sha256:3a35e33902b2e6079949feed7a2dafa5ac6f019da97bd255842bb22de3c11bf5"},
+    {file = "greenlet-0.4.16-cp37-cp37m-win_amd64.whl", hash = "sha256:b0b2a984bbfc543d144d88caad6cc7ff4a71be77102014bd617bd88cfb038727"},
+    {file = "greenlet-0.4.16-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:d83c1d38658b0f81c282b41238092ed89d8f93c6e342224ab73fb39e16848721"},
+    {file = "greenlet-0.4.16-cp38-cp38-win32.whl", hash = "sha256:e695ac8c3efe124d998230b219eb51afb6ef10524a50b3c45109c4b77a8a3a92"},
+    {file = "greenlet-0.4.16-cp38-cp38-win_amd64.whl", hash = "sha256:133ba06bad4e5f2f8bf6a0ac434e0fd686df749a86b3478903b92ec3a9c0c90b"},
+    {file = "greenlet-0.4.16.tar.gz", hash = "sha256:6e06eac722676797e8fce4adb8ad3dc57a1bb3adfb0dd3fdf8306c055a38456c"},
+]
 grpclib = [
-    {file = "grpclib-0.3.1.tar.gz", hash = "sha256:55496fb9f564bbd85b8518c95c088312fb3437f60a0144f39f4cb83bf8978737"},
+    {file = "grpclib-0.3.2.tar.gz", hash = "sha256:d1e76c56f5b9cf268942b93d1ef2046e3983c35ed3e6b592f02f1d9f0db36a81"},
 ]
 h2 = [
     {file = "h2-3.2.0-py2.py3-none-any.whl", hash = "sha256:61e0f6601fa709f35cdb730863b4e5ec7ad449792add80d1410d4174ed139af5"},
@@ -584,13 +742,17 @@ hyperframe = [
     {file = "hyperframe-5.2.0-py2.py3-none-any.whl", hash = "sha256:5187962cb16dcc078f23cb5a4b110098d546c3f41ff2d4038a9896893bbd0b40"},
     {file = "hyperframe-5.2.0.tar.gz", hash = "sha256:a9f5c17f2cc3c719b917c4f33ed1c61bd1f8dfac4b1bd23b7c80b3400971b41f"},
 ]
+idna = [
+    {file = "idna-2.9-py2.py3-none-any.whl", hash = "sha256:a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"},
+    {file = "idna-2.9.tar.gz", hash = "sha256:7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb"},
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@@ -705,46 +867,54 @@ protobuf = [
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+    {file = "regex-2020.6.8-cp38-cp38-win_amd64.whl", hash = "sha256:6ad8663c17db4c5ef438141f99e291c4d4edfeaacc0ce28b5bba2b0bf273d9b5"},
+    {file = "regex-2020.6.8.tar.gz", hash = "sha256:e9b64e609d37438f7d6e68c2546d2cb8062f3adb27e6336bc129b51be20773ac"},
+]
+requests = [
+    {file = "requests-2.24.0-py2.py3-none-any.whl", hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"},
+    {file = "requests-2.24.0.tar.gz", hash = "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b"},
 ]
 six = [
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@@ -758,8 +928,8 @@ toml = [
     {file = "toml-0.10.1.tar.gz", hash = "sha256:926b612be1e5ce0634a2ca03470f95169cf16f939018233a670519cb4ac58b0f"},
 ]
 tox = [
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-    {file = "tox-3.15.1.tar.gz", hash = "sha256:8c9ad9b48659d291c5bc78bcabaa4d680d627687154b812fa52baedaa94f9f83"},
+    {file = "tox-3.15.2-py2.py3-none-any.whl", hash = "sha256:50a188b8e17580c1fb931f494a754e6507d4185f54fb18aca5ba3e12d2ffd55e"},
+    {file = "tox-3.15.2.tar.gz", hash = "sha256:c696d36cd7c6a28ada2da780400e44851b20ee19ef08cfe73344a1dcebbbe9f3"},
 ]
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@@ -789,13 +959,17 @@ typing-extensions = [
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 ]
+urllib3 = [
+    {file = "urllib3-1.25.9-py2.py3-none-any.whl", hash = "sha256:88206b0eb87e6d677d424843ac5209e3fb9d0190d0ee169599165ec25e9d9115"},
+    {file = "urllib3-1.25.9.tar.gz", hash = "sha256:3018294ebefce6572a474f0604c2021e33b3fd8006ecd11d62107a5d2a963527"},
+]
 virtualenv = [
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-    {file = "virtualenv-20.0.21.tar.gz", hash = "sha256:a116629d4e7f4d03433b8afa27f43deba09d48bc48f5ecefa4f015a178efb6cf"},
+    {file = "virtualenv-20.0.23-py2.py3-none-any.whl", hash = "sha256:ccfb8e1e05a1174f7bd4c163700277ba730496094fe1a58bea9d4ac140a207c8"},
+    {file = "virtualenv-20.0.23.tar.gz", hash = "sha256:5102fbf1ec57e80671ef40ed98a84e980a71194cedf30c87c2b25c3a9e0b0107"},
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+    {file = "wcwidth-0.2.4-py2.py3-none-any.whl", hash = "sha256:79375666b9954d4a1a10739315816324c3e73110af9d0e102d906fdb0aec009f"},
+    {file = "wcwidth-0.2.4.tar.gz", hash = "sha256:8c6b5b6ee1360b842645f336d9e5d68c55817c26d3050f46b235ef2bc650e48f"},
 ]
 zipp = [
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diff --git a/pyproject.toml b/pyproject.toml
index 25a4327..e109e35 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,11 @@ protobuf = { version = "^3.12.2", optional = true }
 stringcase = "^1.2.0"
 
 [tool.poetry.dev-dependencies]
+black = "^19.10b0"
+bpython = "^0.19"
+jinja2 = "^2.11.2"
 mypy = "^0.770"
+protobuf = "^3.12.2"
 pytest = "^5.4.2"
 pytest-asyncio = "^0.12.0"
 pytest-cov = "^2.9.0"
@@ -55,4 +59,3 @@ commands =
 [build-system]
 requires = ["poetry>=0.12"]
 build-backend = "poetry.masonry.api"
-

From 4f820b4a6a749b464e0acdc7c274ad25f4e9befa Mon Sep 17 00:00:00 2001
From: Nat Noordanus <n@natn.me>
Date: Mon, 22 Jun 2020 19:38:41 +0200
Subject: [PATCH 14/14] Include python 3.8 i ci test runs & optimise CI and
 make config

---
 .github/workflows/ci.yml | 34 ++++++++++++++++++++++++++--------
 Makefile                 | 18 ++++++++++--------
 README.md                |  5 ++---
 pyproject.toml           |  2 +-
 4 files changed, 39 insertions(+), 20 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e87de5a..f441d54 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,11 +10,17 @@ jobs:
     name: Consult black on python formatting
 
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-python@v1
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
         with:
           python-version: 3.7
       - uses: Gr1N/setup-poetry@v2
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pypoetry/virtualenvs
+          key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-poetry-
       - name: Install dependencies
         run: poetry install
       - name: Run black
@@ -25,25 +31,37 @@ jobs:
 
     name: Run tests with tox
 
+    strategy:
+      matrix:
+        python-version: [ '3.6', '3.7', '3.8']
+
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-python@v1
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
         with:
-          python-version: 3.7
+          python-version: ${{ matrix.python-version }}
       - uses: Gr1N/setup-poetry@v2
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pypoetry/virtualenvs
+          key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-poetry-
       - name: Install dependencies
         run: |
           sudo apt install protobuf-compiler libprotobuf-dev
           poetry install
       - name: Run tests
-        run: make full-test
+        run: |
+          make generate
+          make test
 
   build-release:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-python@v1
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
         with:
           python-version: 3.7
       - uses: Gr1N/setup-poetry@v2
diff --git a/Makefile b/Makefile
index efdd69c..e14f3d7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,6 @@
-help:               ##	- Show this help.
+.PHONY: help setup generate test types format clean plugin full-test check-style
+
+help:               ## - Show this help.
 	@fgrep -h "##" $(MAKEFILE_LIST) | fgrep -v fgrep | sed -e 's/\\$$//' | sed -e 's/##//'
 
 # Dev workflow tasks
@@ -6,16 +8,16 @@ help:               ##	- Show this help.
 generate:           ## - Generate test cases (do this once before running test)
 	poetry run ./betterproto/tests/generate.py
 
-test:               ##	- Run tests
+test:               ## - Run tests
 	poetry run pytest --cov betterproto
 
-types:              ##	- Check types with mypy
+types:              ## - Check types with mypy
 	poetry run mypy betterproto --ignore-missing-imports
 
-format:             ##	- Apply black formatting to source code
+format:             ## - Apply black formatting to source code
 	poetry run black . --exclude tests/output_
 
-clean:						  ## - Clean out generated files from the workspace
+clean:              ## - Clean out generated files from the workspace
 	rm -rf .coverage \
 	       .mypy_cache \
 	       .pytest_cache \
@@ -27,14 +29,14 @@ clean:						  ## - Clean out generated files from the workspace
 
 # By default write plugin output to a directory called output
 o=output
-plugin:             ##	- Execute the protoc plugin, with output writte to `output` or the value passed to `-o`
+plugin:             ## - Execute the protoc plugin, with output write to `output` or the value passed to `-o`
 	mkdir -p $(o)
 	protoc --plugin=protoc-gen-custom=betterproto/plugin.py $(i) --custom_out=$(o)
 
 # CI tasks
 
-full-test: generate ##	- Run full testing sequence
+full-test: generate ## - Run full testing sequence with multiple pythons
 	poetry run tox
 
-check-style:        ##	- Check if code style is correct
+check-style:        ## - Check if code style is correct
 	poetry run black . --check --diff --exclude tests/output_
diff --git a/README.md b/README.md
index 8f4d2da..c6001b3 100644
--- a/README.md
+++ b/README.md
@@ -351,10 +351,9 @@ Custom tests are found in `tests/test_*.py` and are run with pytest.
 Here's how to run the tests.
 
 ```sh
-# Generate assets from sample .proto files
+# Generate assets from sample .proto files required by the tests
 make generate
-
-# Run all tests
+# Run the tests
 make test
 ```
 
diff --git a/pyproject.toml b/pyproject.toml
index e109e35..f4466d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,7 @@ omit = ["betterproto/tests/*"]
 legacy_tox_ini = """
 [tox]
 isolated_build = true
-envlist = py36, py37
+envlist = py36, py37, py38
 
 [testenv]
 whitelist_externals = poetry