Switched TestCase to SimpleTestCase where possible in Django's tests.

tests/postgres_tests/__init__.py

@@ -3,7 +3,12 @@ import unittest
 from forms_tests.widget_tests.base import WidgetTest
 
 from django.db import connection
-from django.test import TestCase, modify_settings
+from django.test import SimpleTestCase, TestCase, modify_settings
+
+
+@unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific tests")
+class PostgreSQLSimpleTestCase(SimpleTestCase):
+    pass
 
 
 @unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific tests")
@@ -14,5 +19,5 @@ class PostgreSQLTestCase(TestCase):
 @unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific tests")
 # To locate the widget's template.
 @modify_settings(INSTALLED_APPS={'append': 'django.contrib.postgres'})
-class PostgreSQLWidgetTestCase(WidgetTest, PostgreSQLTestCase):
+class PostgreSQLWidgetTestCase(WidgetTest, PostgreSQLSimpleTestCase):
     pass

tests/postgres_tests/test_array.py

@@ -12,7 +12,9 @@ from django.test import TransactionTestCase, modify_settings, override_settings
 from django.test.utils import isolate_apps
 from django.utils import timezone
 
-from . import PostgreSQLTestCase, PostgreSQLWidgetTestCase
+from . import (
+    PostgreSQLSimpleTestCase, PostgreSQLTestCase, PostgreSQLWidgetTestCase,
+)
 from .models import (
     ArrayFieldSubclass, CharArrayModel, DateTimeArrayModel, IntegerArrayModel,
     NestedIntegerArrayModel, NullableIntegerArrayModel, OtherTypesArrayModel,
@@ -440,7 +442,7 @@ class TestOtherTypesExactQuerying(PostgreSQLTestCase):
 
 
 @isolate_apps('postgres_tests')
-class TestChecks(PostgreSQLTestCase):
+class TestChecks(PostgreSQLSimpleTestCase):
 
     def test_field_checks(self):
         class MyModel(PostgreSQLModel):
@@ -589,7 +591,7 @@ class TestMigrations(TransactionTestCase):
             self.assertNotIn(table_name, connection.introspection.table_names(cursor))
 
 
-class TestSerialization(PostgreSQLTestCase):
+class TestSerialization(PostgreSQLSimpleTestCase):
     test_data = (
         '[{"fields": {"field": "[\\"1\\", \\"2\\", null]"}, "model": "postgres_tests.integerarraymodel", "pk": null}]'
     )
@@ -604,7 +606,7 @@ class TestSerialization(PostgreSQLTestCase):
         self.assertEqual(instance.field, [1, 2, None])
 
 
-class TestValidation(PostgreSQLTestCase):
+class TestValidation(PostgreSQLSimpleTestCase):
 
     def test_unbounded(self):
         field = ArrayField(models.IntegerField())
@@ -664,7 +666,7 @@ class TestValidation(PostgreSQLTestCase):
         self.assertEqual(exception.params, {'nth': 1, 'value': 0, 'limit_value': 1, 'show_value': 0})
 
 
-class TestSimpleFormField(PostgreSQLTestCase):
+class TestSimpleFormField(PostgreSQLSimpleTestCase):
 
     def test_valid(self):
         field = SimpleArrayField(forms.CharField())
@@ -782,7 +784,7 @@ class TestSimpleFormField(PostgreSQLTestCase):
         self.assertIs(field.has_changed([], ''), False)
 
 
-class TestSplitFormField(PostgreSQLTestCase):
+class TestSplitFormField(PostgreSQLSimpleTestCase):
 
     def test_valid(self):
         class SplitForm(forms.Form):

tests/postgres_tests/test_hstore.py

@@ -2,9 +2,9 @@ import json
 
 from django.core import checks, exceptions, serializers
 from django.forms import Form
-from django.test.utils import isolate_apps, modify_settings
+from django.test.utils import isolate_apps
 
-from . import PostgreSQLTestCase
+from . import PostgreSQLSimpleTestCase, PostgreSQLTestCase
 from .models import HStoreModel, PostgreSQLModel
 
 try:
@@ -15,12 +15,7 @@ except ImportError:
     pass
 
 
-@modify_settings(INSTALLED_APPS={'append': 'django.contrib.postgres'})
-class HStoreTestCase(PostgreSQLTestCase):
-    pass
-
-
-class SimpleTests(HStoreTestCase):
+class SimpleTests(PostgreSQLTestCase):
     def test_save_load_success(self):
         value = {'a': 'b'}
         instance = HStoreModel(field=value)
@@ -69,7 +64,7 @@ class SimpleTests(HStoreTestCase):
         self.assertEqual(instance.array_field, expected_value)
 
 
-class TestQuerying(HStoreTestCase):
+class TestQuerying(PostgreSQLTestCase):
 
     def setUp(self):
         self.objs = [
@@ -191,7 +186,7 @@ class TestQuerying(HStoreTestCase):
 
 
 @isolate_apps('postgres_tests')
-class TestChecks(PostgreSQLTestCase):
+class TestChecks(PostgreSQLSimpleTestCase):
 
     def test_invalid_default(self):
         class MyModel(PostgreSQLModel):
@@ -218,7 +213,7 @@ class TestChecks(PostgreSQLTestCase):
         self.assertEqual(MyModel().check(), [])
 
 
-class TestSerialization(HStoreTestCase):
+class TestSerialization(PostgreSQLSimpleTestCase):
     test_data = json.dumps([{
         'model': 'postgres_tests.hstoremodel',
         'pk': None,
@@ -248,7 +243,7 @@ class TestSerialization(HStoreTestCase):
         self.assertEqual(instance.field, new_instance.field)
 
 
-class TestValidation(HStoreTestCase):
+class TestValidation(PostgreSQLSimpleTestCase):
 
     def test_not_a_string(self):
         field = HStoreField()
@@ -262,7 +257,7 @@ class TestValidation(HStoreTestCase):
         self.assertEqual(field.clean({'a': None}, None), {'a': None})
 
 
-class TestFormField(HStoreTestCase):
+class TestFormField(PostgreSQLSimpleTestCase):
 
     def test_valid(self):
         field = forms.HStoreField()
@@ -325,7 +320,7 @@ class TestFormField(HStoreTestCase):
         self.assertTrue(form_w_hstore.has_changed())
 
 
-class TestValidator(HStoreTestCase):
+class TestValidator(PostgreSQLSimpleTestCase):
 
     def test_simple_valid(self):
         validator = KeysValidator(keys=['a', 'b'])

tests/postgres_tests/test_indexes.py

@@ -11,7 +11,7 @@ from django.db.utils import NotSupportedError
 from django.test import skipUnlessDBFeature
 from django.test.utils import register_lookup
 
-from . import PostgreSQLTestCase
+from . import PostgreSQLSimpleTestCase, PostgreSQLTestCase
 from .models import CharFieldModel, IntegerArrayModel
 
 
@@ -31,7 +31,7 @@ class IndexTestMixin:
 
 
 @skipUnlessDBFeature('has_brin_index_support')
-class BrinIndexTests(IndexTestMixin, PostgreSQLTestCase):
+class BrinIndexTests(IndexTestMixin, PostgreSQLSimpleTestCase):
     index_class = BrinIndex
 
     def test_suffix(self):
@@ -54,7 +54,7 @@ class BrinIndexTests(IndexTestMixin, PostgreSQLTestCase):
             BrinIndex(fields=['title'], name='test_title_brin', pages_per_range=0)
 
 
-class BTreeIndexTests(IndexTestMixin, PostgreSQLTestCase):
+class BTreeIndexTests(IndexTestMixin, PostgreSQLSimpleTestCase):
     index_class = BTreeIndex
 
     def test_suffix(self):
@@ -68,7 +68,7 @@ class BTreeIndexTests(IndexTestMixin, PostgreSQLTestCase):
         self.assertEqual(kwargs, {'fields': ['title'], 'name': 'test_title_btree', 'fillfactor': 80})
 
 
-class GinIndexTests(IndexTestMixin, PostgreSQLTestCase):
+class GinIndexTests(IndexTestMixin, PostgreSQLSimpleTestCase):
     index_class = GinIndex
 
     def test_suffix(self):
@@ -92,7 +92,7 @@ class GinIndexTests(IndexTestMixin, PostgreSQLTestCase):
         })
 
 
-class GistIndexTests(IndexTestMixin, PostgreSQLTestCase):
+class GistIndexTests(IndexTestMixin, PostgreSQLSimpleTestCase):
     index_class = GistIndex
 
     def test_suffix(self):
@@ -111,7 +111,7 @@ class GistIndexTests(IndexTestMixin, PostgreSQLTestCase):
         })
 
 
-class HashIndexTests(IndexTestMixin, PostgreSQLTestCase):
+class HashIndexTests(IndexTestMixin, PostgreSQLSimpleTestCase):
     index_class = HashIndex
 
     def test_suffix(self):
@@ -125,7 +125,7 @@ class HashIndexTests(IndexTestMixin, PostgreSQLTestCase):
         self.assertEqual(kwargs, {'fields': ['title'], 'name': 'test_title_hash', 'fillfactor': 80})
 
 
-class SpGistIndexTests(IndexTestMixin, PostgreSQLTestCase):
+class SpGistIndexTests(IndexTestMixin, PostgreSQLSimpleTestCase):
     index_class = SpGistIndex
 
     def test_suffix(self):

tests/postgres_tests/test_json.py

@@ -9,7 +9,7 @@ from django.forms import CharField, Form, widgets
 from django.test.utils import isolate_apps
 from django.utils.html import escape
 
-from . import PostgreSQLTestCase
+from . import PostgreSQLSimpleTestCase, PostgreSQLTestCase
 from .models import JSONModel, PostgreSQLModel
 
 try:
@@ -301,7 +301,7 @@ class TestQuerying(PostgreSQLTestCase):
 
 
 @isolate_apps('postgres_tests')
-class TestChecks(PostgreSQLTestCase):
+class TestChecks(PostgreSQLSimpleTestCase):
 
     def test_invalid_default(self):
         class MyModel(PostgreSQLModel):
@@ -336,7 +336,7 @@ class TestChecks(PostgreSQLTestCase):
         self.assertEqual(model.check(), [])
 
 
-class TestSerialization(PostgreSQLTestCase):
+class TestSerialization(PostgreSQLSimpleTestCase):
     test_data = (
         '[{"fields": {"field": %s, "field_custom": null}, '
         '"model": "postgres_tests.jsonmodel", "pk": null}]'
@@ -362,7 +362,7 @@ class TestSerialization(PostgreSQLTestCase):
                 self.assertEqual(instance.field, value)
 
 
-class TestValidation(PostgreSQLTestCase):
+class TestValidation(PostgreSQLSimpleTestCase):
 
     def test_not_serializable(self):
         field = JSONField()
@@ -378,7 +378,7 @@ class TestValidation(PostgreSQLTestCase):
         self.assertEqual(field.clean(datetime.timedelta(days=1), None), datetime.timedelta(days=1))
 
 
-class TestFormField(PostgreSQLTestCase):
+class TestFormField(PostgreSQLSimpleTestCase):
 
     def test_valid(self):
         field = forms.JSONField()

tests/postgres_tests/test_ranges.py

@@ -9,7 +9,7 @@ from django.test import ignore_warnings, override_settings
 from django.utils import timezone
 from django.utils.deprecation import RemovedInDjango31Warning
 
-from . import PostgreSQLTestCase
+from . import PostgreSQLSimpleTestCase, PostgreSQLTestCase
 from .models import RangeLookupsModel, RangesModel
 
 try:
@@ -355,7 +355,7 @@ class TestQueryingWithRanges(PostgreSQLTestCase):
         )
 
 
-class TestSerialization(PostgreSQLTestCase):
+class TestSerialization(PostgreSQLSimpleTestCase):
     test_data = (
         '[{"fields": {"ints": "{\\"upper\\": \\"10\\", \\"lower\\": \\"0\\", '
         '\\"bounds\\": \\"[)\\"}", "decimals": "{\\"empty\\": true}", '
@@ -405,7 +405,7 @@ class TestSerialization(PostgreSQLTestCase):
         self.assertEqual(new_instance.ints, NumericRange(10, None))
 
 
-class TestValidators(PostgreSQLTestCase):
+class TestValidators(PostgreSQLSimpleTestCase):
 
     def test_max(self):
         validator = RangeMaxValueValidator(5)
@@ -430,7 +430,7 @@ class TestValidators(PostgreSQLTestCase):
             validator(NumericRange(None, 10))  # an unbound range
 
 
-class TestFormField(PostgreSQLTestCase):
+class TestFormField(PostgreSQLSimpleTestCase):
 
     def test_valid_integer(self):
         field = pg_forms.IntegerRangeField()
@@ -708,7 +708,7 @@ class TestFormField(PostgreSQLTestCase):
         self.assertIsInstance(form_field, pg_forms.DateTimeRangeField)
 
 
-class TestWidget(PostgreSQLTestCase):
+class TestWidget(PostgreSQLSimpleTestCase):
     def test_range_widget(self):
         f = pg_forms.ranges.DateTimeRangeField()
         self.assertHTMLEqual(