Enable postponed evaluation of annotations for all test modules

This allows using the latest annotation syntax supported by the type
checker regardless of the runtime Python version.

tests/fields.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import models
 
 

tests/test_choices.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from model_utils import Choices

tests/test_fields/test_monitor_field.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import datetime, timezone
 
 import time_machine

tests/test_fields/test_split_field.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from tests.models import Article, SplitFieldAbstractParent

tests/test_fields/test_status_field.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from model_utils.fields import StatusField

tests/test_fields/test_urlsafe_token_field.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from unittest.mock import Mock
 
 from django.db.models import NOT_PROVIDED

tests/test_fields/test_uuid_field.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import uuid
 
 from django.core.exceptions import ValidationError

tests/test_inheritance_iterable.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db.models import Prefetch
 from django.test import TestCase
 

tests/test_managers/test_inheritance_manager.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import models
 from django.test import TestCase
 

tests/test_managers/test_join_manager.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from tests.models import BoxJoinModel, JoinItemForeignKey

tests/test_managers/test_query_manager.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from tests.models import Post

tests/test_managers/test_softdelete_manager.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from tests.models import CustomSoftDelete

tests/test_managers/test_status_manager.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.core.exceptions import ImproperlyConfigured
 from django.db import models
 from django.test import TestCase

tests/test_miscellaneous.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.core.management import call_command
 from django.test import TestCase
 

tests/test_models/test_deferred_fields.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from tests.models import ModelWithCustomDescriptor

tests/test_models/test_softdeletable_model.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 from django.utils.connection import ConnectionDoesNotExist
 

tests/test_models/test_status_model.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import datetime, timezone
 
 import time_machine

tests/test_models/test_timeframed_model.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import datetime, timedelta
 
 from django.core.exceptions import ImproperlyConfigured

tests/test_models/test_timestamped_model.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import datetime, timedelta, timezone
 
 import time_machine

tests/test_models/test_uuid_model.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.test import TestCase
 
 from tests.models import CustomNotPrimaryUUIDModel, CustomUUIDModel