Fixes #23 again, a broken test made it seem the issue was fixed before.

betterproto/tests/inputs/import_service_input_message/child_package_request_message.proto

@@ -0,0 +1,7 @@
+syntax = "proto3";
+
+package child;
+
+message ChildRequestMessage {
+    int32 child_argument = 1;
+}

betterproto/tests/inputs/import_service_input_message/import_service_input_message.proto

@@ -1,11 +1,14 @@
 syntax = "proto3";
 
 import "request_message.proto";
+import "child_package_request_message.proto";
 
 // Tests generated service correctly imports the RequestMessage
 
 service Test {
     rpc DoThing (RequestMessage) returns (RequestResponse);
+    rpc DoThing2 (child.ChildRequestMessage) returns (RequestResponse);
+    rpc DoThing3 (Nested.RequestMessage) returns (RequestResponse);
 }
 
 
@@ -13,3 +16,8 @@ message RequestResponse {
     int32 value = 1;
 }
 
+message Nested {
+    message RequestMessage {
+        int32 nestedArgument = 1;
+    }
+}

betterproto/tests/inputs/import_service_input_message/test_import_service.py

@@ -1,16 +0,0 @@
-import pytest
-
-from betterproto.tests.mocks import MockChannel
-from betterproto.tests.output_betterproto.import_service_input_message import (
-    RequestResponse,
-    TestStub,
-)
-
-
-@pytest.mark.xfail(reason="#68 Request Input Messages are not imported for service")
-@pytest.mark.asyncio
-async def test_service_correctly_imports_reference_message():
-    mock_response = RequestResponse(value=10)
-    service = TestStub(MockChannel([mock_response]))
-    response = await service.do_thing()
-    assert mock_response == response

betterproto/tests/inputs/import_service_input_message/test_import_service_input_message.py

@@ -0,0 +1,31 @@
+import pytest
+
+from betterproto.tests.mocks import MockChannel
+from betterproto.tests.output_betterproto.import_service_input_message import (
+    RequestResponse,
+    TestStub,
+)
+
+
+@pytest.mark.asyncio
+async def test_service_correctly_imports_reference_message():
+    mock_response = RequestResponse(value=10)
+    service = TestStub(MockChannel([mock_response]))
+    response = await service.do_thing(argument=1)
+    assert mock_response == response
+
+
+@pytest.mark.asyncio
+async def test_service_correctly_imports_reference_message_from_child_package():
+    mock_response = RequestResponse(value=10)
+    service = TestStub(MockChannel([mock_response]))
+    response = await service.do_thing2(child_argument=1)
+    assert mock_response == response
+
+
+@pytest.mark.asyncio
+async def test_service_correctly_imports_nested_reference():
+    mock_response = RequestResponse(value=10)
+    service = TestStub(MockChannel([mock_response]))
+    response = await service.do_thing3(nested_argument=1)
+    assert mock_response == response