add standard hooks

tests/fields/test_boolean_field.py

@@ -1,7 +1,7 @@
 import pytest
 
 from mongoengine import *
-from tests.utils import get_as_pymongo, MongoDBTestCase
+from tests.utils import MongoDBTestCase, get_as_pymongo
 
 
 class TestBooleanField(MongoDBTestCase):

tests/fields/test_dict_field.py

@@ -4,10 +4,10 @@ from bson import InvalidDocument
 from mongoengine import *
 from mongoengine.base import BaseDict
 from mongoengine.mongodb_support import (
-    get_mongodb_version,
     MONGODB_36,
+    get_mongodb_version,
 )
-from tests.utils import get_as_pymongo, MongoDBTestCase
+from tests.utils import MongoDBTestCase, get_as_pymongo
 
 
 class TestDictField(MongoDBTestCase):

tests/fields/test_enum_field.py

@@ -4,7 +4,7 @@ import pytest
 from bson import InvalidDocument
 
 from mongoengine import Document, EnumField, ValidationError
-from tests.utils import get_as_pymongo, MongoDBTestCase
+from tests.utils import MongoDBTestCase, get_as_pymongo
 
 
 class Status(Enum):

tests/fields/test_fields.py

@@ -2,7 +2,7 @@ import datetime
 import unittest
 
 import pytest
-from bson import DBRef, ObjectId, SON
+from bson import SON, DBRef, ObjectId
 
 from mongoengine import (
     BooleanField,
@@ -35,9 +35,9 @@ from mongoengine import (
     ValidationError,
 )
 from mongoengine.base import (
-    _document_registry,
     BaseField,
     EmbeddedDocumentList,
+    _document_registry,
 )
 from mongoengine.errors import DeprecatedError
 from tests.utils import MongoDBTestCase

tests/fields/test_long_field.py

@@ -3,7 +3,7 @@ from bson.int64 import Int64
 
 from mongoengine import *
 from mongoengine.connection import get_db
-from tests.utils import get_as_pymongo, MongoDBTestCase
+from tests.utils import MongoDBTestCase, get_as_pymongo
 
 
 class TestLongField(MongoDBTestCase):

tests/fields/test_reference_field.py

@@ -1,5 +1,5 @@
 import pytest
-from bson import DBRef, SON
+from bson import SON, DBRef
 
 from mongoengine import *
 from tests.utils import MongoDBTestCase

tests/fields/test_string_field.py

@@ -1,7 +1,7 @@
 import pytest
 
 from mongoengine import *
-from tests.utils import get_as_pymongo, MongoDBTestCase
+from tests.utils import MongoDBTestCase, get_as_pymongo
 
 
 class TestStringField(MongoDBTestCase):

tests/fields/test_uuid_field.py

@@ -3,7 +3,7 @@ import uuid
 import pytest
 
 from mongoengine import *
-from tests.utils import get_as_pymongo, MongoDBTestCase
+from tests.utils import MongoDBTestCase, get_as_pymongo
 
 
 class Person(Document):