Stopped special-casing postgres-specific tests

Refs #23879.

12 files changed, 154 insertions, 71 deletions

diff --git a/django/contrib/postgres/operations.py b/django/contrib/postgres/operations.py
index 5b3bd2a3cc..3bb81dc3f9 100644
--- a/django/contrib/postgres/operations.py
+++ b/django/contrib/postgres/operations.py
@@ -12,6 +12,8 @@ class CreateExtension(Operation):
         pass
 
     def database_forwards(self, app_label, schema_editor, from_state, to_state):
+        if schema_editor.connection.vendor != 'postgresql':
+            return
         schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % self.name)
 
     def database_backwards(self, app_label, schema_editor, from_state, to_state):
diff --git a/tests/postgres_tests/__init__.py b/tests/postgres_tests/__init__.py
index e69de29bb2..9076bef850 100644
--- a/tests/postgres_tests/__init__.py
+++ b/tests/postgres_tests/__init__.py
@@ -0,0 +1,9 @@
+import unittest
+
+from django.db import connection
+from django.test import TestCase
+
+
+@unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific tests")
+class PostgresSQLTestCase(TestCase):
+    pass
diff --git a/tests/postgres_tests/fields.py b/tests/postgres_tests/fields.py
new file mode 100644
index 0000000000..e21ca1bfcb
--- /dev/null
+++ b/tests/postgres_tests/fields.py
@@ -0,0 +1,31 @@
+"""
+Indirection layer for PostgreSQL-specific fields, so the tests don't fail when
+run with a backend other than PostgreSQL.
+"""
+from django.db import models
+
+try:
+    from django.contrib.postgres.fields import (
+        ArrayField, BigIntegerRangeField, DateRangeField, DateTimeRangeField,
+        FloatRangeField, HStoreField, IntegerRangeField,
+    )
+except ImportError:
+    class DummyArrayField(models.Field):
+        def __init__(self, base_field, size=None, **kwargs):
+            super(DummyArrayField, self).__init__(**kwargs)
+
+        def deconstruct(self):
+            name, path, args, kwargs = super(DummyArrayField, self).deconstruct()
+            kwargs.update({
+                'base_field': '',
+                'size': 1,
+            })
+            return name, path, args, kwargs
+
+    ArrayField = DummyArrayField
+    BigIntegerRangeField = models.Field
+    DateRangeField = models.Field
+    DateTimeRangeField = models.Field
+    FloatRangeField = models.Field
+    HStoreField = models.Field
+    IntegerRangeField = models.Field
diff --git a/tests/postgres_tests/migrations/0001_setup_extensions.py b/tests/postgres_tests/migrations/0001_setup_extensions.py
index 0915b74343..ad5d1c716a 100644
--- a/tests/postgres_tests/migrations/0001_setup_extensions.py
+++ b/tests/postgres_tests/migrations/0001_setup_extensions.py
@@ -1,11 +1,17 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from django.contrib.postgres.operations import (
-    HStoreExtension, UnaccentExtension,
-)
 from django.db import migrations
 
+try:
+    from django.contrib.postgres.operations import (
+        HStoreExtension, UnaccentExtension,
+    )
+except ImportError:
+    from django.test import mock
+    HStoreExtension = mock.Mock()
+    UnaccentExtension = mock.Mock()
+
 
 class Migration(migrations.Migration):
 
diff --git a/tests/postgres_tests/migrations/0002_create_test_models.py b/tests/postgres_tests/migrations/0002_create_test_models.py
index 7853f40a14..106818a7c6 100644
--- a/tests/postgres_tests/migrations/0002_create_test_models.py
+++ b/tests/postgres_tests/migrations/0002_create_test_models.py
@@ -1,10 +1,10 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-import django.contrib.postgres.fields
-import django.contrib.postgres.fields.hstore
 from django.db import migrations, models
 
+from ..fields import *  # NOQA
+
 
 class Migration(migrations.Migration):
 
@@ -17,9 +17,10 @@ class Migration(migrations.Migration):
             name='CharArrayModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('field', django.contrib.postgres.fields.ArrayField(models.CharField(max_length=10), size=None)),
+                ('field', ArrayField(models.CharField(max_length=10), size=None)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
@@ -27,11 +28,12 @@ class Migration(migrations.Migration):
             name='DateTimeArrayModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('datetimes', django.contrib.postgres.fields.ArrayField(models.DateTimeField(), size=None)),
-                ('dates', django.contrib.postgres.fields.ArrayField(models.DateField(), size=None)),
-                ('times', django.contrib.postgres.fields.ArrayField(models.TimeField(), size=None)),
+                ('datetimes', ArrayField(models.DateTimeField(), size=None)),
+                ('dates', ArrayField(models.DateField(), size=None)),
+                ('times', ArrayField(models.TimeField(), size=None)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
@@ -39,9 +41,10 @@ class Migration(migrations.Migration):
             name='HStoreModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('field', django.contrib.postgres.fields.hstore.HStoreField(blank=True, null=True)),
+                ('field', HStoreField(blank=True, null=True)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
@@ -49,11 +52,12 @@ class Migration(migrations.Migration):
             name='OtherTypesArrayModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('ips', django.contrib.postgres.fields.ArrayField(models.GenericIPAddressField(), size=None)),
-                ('uuids', django.contrib.postgres.fields.ArrayField(models.UUIDField(), size=None)),
-                ('decimals', django.contrib.postgres.fields.ArrayField(models.DecimalField(max_digits=5, decimal_places=2), size=None)),
+                ('ips', ArrayField(models.GenericIPAddressField(), size=None)),
+                ('uuids', ArrayField(models.UUIDField(), size=None)),
+                ('decimals', ArrayField(models.DecimalField(max_digits=5, decimal_places=2), size=None)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
@@ -61,9 +65,10 @@ class Migration(migrations.Migration):
             name='IntegerArrayModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('field', django.contrib.postgres.fields.ArrayField(models.IntegerField(), size=None)),
+                ('field', ArrayField(models.IntegerField(), size=None)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
@@ -71,9 +76,10 @@ class Migration(migrations.Migration):
             name='NestedIntegerArrayModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('field', django.contrib.postgres.fields.ArrayField(django.contrib.postgres.fields.ArrayField(models.IntegerField(), size=None), size=None)),
+                ('field', ArrayField(ArrayField(models.IntegerField(), size=None), size=None)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
@@ -81,9 +87,10 @@ class Migration(migrations.Migration):
             name='NullableIntegerArrayModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('field', django.contrib.postgres.fields.ArrayField(models.IntegerField(), size=None, null=True, blank=True)),
+                ('field', ArrayField(models.IntegerField(), size=None, null=True, blank=True)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
@@ -130,20 +137,25 @@ class Migration(migrations.Migration):
             name='RangesModel',
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('ints', django.contrib.postgres.fields.IntegerRangeField(null=True, blank=True)),
-                ('bigints', django.contrib.postgres.fields.BigIntegerRangeField(null=True, blank=True)),
-                ('floats', django.contrib.postgres.fields.FloatRangeField(null=True, blank=True)),
-                ('timestamps', django.contrib.postgres.fields.DateTimeRangeField(null=True, blank=True)),
-                ('dates', django.contrib.postgres.fields.DateRangeField(null=True, blank=True)),
+                ('ints', IntegerRangeField(null=True, blank=True)),
+                ('bigints', BigIntegerRangeField(null=True, blank=True)),
+                ('floats', FloatRangeField(null=True, blank=True)),
+                ('timestamps', DateTimeRangeField(null=True, blank=True)),
+                ('dates', DateRangeField(null=True, blank=True)),
             ],
             options={
+                'required_db_vendor': 'postgresql',
             },
             bases=(models.Model,),
         ),
     ]
 
     def apply(self, project_state, schema_editor, collect_sql=False):
-        PG_VERSION = schema_editor.connection.pg_version
-        if PG_VERSION >= 90200:
-            self.operations = self.operations + self.pg_92_operations
+        try:
+            PG_VERSION = schema_editor.connection.pg_version
+        except AttributeError:
+            pass  # We are probably not on PostgreSQL
+        else:
+            if PG_VERSION >= 90200:
+                self.operations = self.operations + self.pg_92_operations
         return super(Migration, self).apply(project_state, schema_editor, collect_sql)
diff --git a/tests/postgres_tests/models.py b/tests/postgres_tests/models.py
index b53eda4cca..aafd529443 100644
--- a/tests/postgres_tests/models.py
+++ b/tests/postgres_tests/models.py
@@ -1,39 +1,46 @@
-from django.contrib.postgres.fields import (
+from django.db import connection, models
+
+from .fields import (
     ArrayField, BigIntegerRangeField, DateRangeField, DateTimeRangeField,
     FloatRangeField, HStoreField, IntegerRangeField,
 )
-from django.db import connection, models
 
 
-class IntegerArrayModel(models.Model):
+class PostgreSQLModel(models.Model):
+    class Meta:
+        abstract = True
+        required_db_vendor = 'postgresql'
+
+
+class IntegerArrayModel(PostgreSQLModel):
     field = ArrayField(models.IntegerField())
 
 
-class NullableIntegerArrayModel(models.Model):
+class NullableIntegerArrayModel(PostgreSQLModel):
     field = ArrayField(models.IntegerField(), blank=True, null=True)
 
 
-class CharArrayModel(models.Model):
+class CharArrayModel(PostgreSQLModel):
     field = ArrayField(models.CharField(max_length=10))
 
 
-class DateTimeArrayModel(models.Model):
+class DateTimeArrayModel(PostgreSQLModel):
     datetimes = ArrayField(models.DateTimeField())
     dates = ArrayField(models.DateField())
     times = ArrayField(models.TimeField())
 
 
-class NestedIntegerArrayModel(models.Model):
+class NestedIntegerArrayModel(PostgreSQLModel):
     field = ArrayField(ArrayField(models.IntegerField()))
 
 
-class OtherTypesArrayModel(models.Model):
+class OtherTypesArrayModel(PostgreSQLModel):
     ips = ArrayField(models.GenericIPAddressField())
     uuids = ArrayField(models.UUIDField())
     decimals = ArrayField(models.DecimalField(max_digits=5, decimal_places=2))
 
 
-class HStoreModel(models.Model):
+class HStoreModel(PostgreSQLModel):
     field = HStoreField(blank=True, null=True)
 
 
@@ -47,7 +54,7 @@ class TextFieldModel(models.Model):
 
 # Only create this model for databases which support it
 if connection.vendor == 'postgresql' and connection.pg_version >= 90200:
-    class RangesModel(models.Model):
+    class RangesModel(PostgreSQLModel):
         ints = IntegerRangeField(blank=True, null=True)
         bigints = BigIntegerRangeField(blank=True, null=True)
         floats = FloatRangeField(blank=True, null=True)
diff --git a/tests/postgres_tests/test_aggregates.py b/tests/postgres_tests/test_aggregates.py
index 2857d917d5..4ce0d4237a 100644
--- a/tests/postgres_tests/test_aggregates.py
+++ b/tests/postgres_tests/test_aggregates.py
@@ -4,13 +4,13 @@ from django.contrib.postgres.aggregates import (
     RegrSYY, StatAggregate, StringAgg,
 )
 from django.db.models.expressions import F, Value
-from django.test import TestCase
 from django.test.utils import Approximate
 
+from . import PostgresSQLTestCase
 from .models import AggregateTestModel, StatTestModel
 
 
-class TestGeneralAggregate(TestCase):
+class TestGeneralAggregate(PostgresSQLTestCase):
     @classmethod
     def setUpTestData(cls):
         AggregateTestModel.objects.create(boolean_field=True, char_field='Foo1', integer_field=0)
@@ -111,7 +111,7 @@ class TestGeneralAggregate(TestCase):
         self.assertEqual(values, {'stringagg': ''})
 
 
-class TestStatisticsAggregate(TestCase):
+class TestStatisticsAggregate(PostgresSQLTestCase):
     @classmethod
     def setUpTestData(cls):
         StatTestModel.objects.create(
diff --git a/tests/postgres_tests/test_array.py b/tests/postgres_tests/test_array.py
index 35a3bffd58..895c910a8b 100644
--- a/tests/postgres_tests/test_array.py
+++ b/tests/postgres_tests/test_array.py
@@ -4,21 +4,26 @@ import unittest
 import uuid
 
 from django import forms
-from django.contrib.postgres.fields import ArrayField
-from django.contrib.postgres.forms import SimpleArrayField, SplitArrayField
 from django.core import exceptions, serializers, validators
 from django.core.management import call_command
 from django.db import IntegrityError, connection, models
-from django.test import TestCase, TransactionTestCase, override_settings
+from django.test import TransactionTestCase, override_settings
 from django.utils import timezone
 
+from . import PostgresSQLTestCase
 from .models import (
     ArrayFieldSubclass, CharArrayModel, DateTimeArrayModel, IntegerArrayModel,
     NestedIntegerArrayModel, NullableIntegerArrayModel, OtherTypesArrayModel,
 )
 
+try:
+    from django.contrib.postgres.fields import ArrayField
+    from django.contrib.postgres.forms import SimpleArrayField, SplitArrayField
+except ImportError:
+    pass
 
-class TestSaveLoad(TestCase):
+
+class TestSaveLoad(PostgresSQLTestCase):
 
     def test_integer(self):
         instance = IntegerArrayModel(field=[1, 2, 3])
@@ -93,7 +98,7 @@ class TestSaveLoad(TestCase):
         self.assertEqual(instance.decimals, loaded.decimals)
 
 
-class TestQuerying(TestCase):
+class TestQuerying(PostgresSQLTestCase):
 
     def setUp(self):
         self.objs = [
@@ -224,7 +229,7 @@ class TestQuerying(TestCase):
         )
 
 
-class TestChecks(TestCase):
+class TestChecks(PostgresSQLTestCase):
 
     def test_field_checks(self):
         field = ArrayField(models.CharField())
@@ -241,6 +246,7 @@ class TestChecks(TestCase):
         self.assertEqual(errors[0].id, 'postgres.E002')
 
 
+@unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific tests")
 class TestMigrations(TransactionTestCase):
 
     available_apps = ['postgres_tests']
@@ -288,7 +294,7 @@ class TestMigrations(TransactionTestCase):
             self.assertNotIn(table_name, connection.introspection.table_names(cursor))
 
 
-class TestSerialization(TestCase):
+class TestSerialization(PostgresSQLTestCase):
     test_data = '[{"fields": {"field": "[\\"1\\", \\"2\\"]"}, "model": "postgres_tests.integerarraymodel", "pk": null}]'
 
     def test_dumping(self):
@@ -301,7 +307,7 @@ class TestSerialization(TestCase):
         self.assertEqual(instance.field, [1, 2])
 
 
-class TestValidation(TestCase):
+class TestValidation(PostgresSQLTestCase):
 
     def test_unbounded(self):
         field = ArrayField(models.IntegerField())
@@ -339,7 +345,7 @@ class TestValidation(TestCase):
         self.assertEqual(cm.exception.messages[0], 'Item 0 in the array did not validate: Ensure this value is greater than or equal to 1.')
 
 
-class TestSimpleFormField(TestCase):
+class TestSimpleFormField(PostgresSQLTestCase):
 
     def test_valid(self):
         field = SimpleArrayField(forms.CharField())
@@ -411,7 +417,7 @@ class TestSimpleFormField(TestCase):
         self.assertEqual(form_field.max_length, 4)
 
 
-class TestSplitFormField(TestCase):
+class TestSplitFormField(PostgresSQLTestCase):
 
     def test_valid(self):
         class SplitForm(forms.Form):
diff --git a/tests/postgres_tests/test_hstore.py b/tests/postgres_tests/test_hstore.py
index 06544163f8..ed88e2fab5 100644
--- a/tests/postgres_tests/test_hstore.py
+++ b/tests/postgres_tests/test_hstore.py
@@ -1,15 +1,19 @@
 import json
 
-from django.contrib.postgres import forms
-from django.contrib.postgres.fields import HStoreField
-from django.contrib.postgres.validators import KeysValidator
 from django.core import exceptions, serializers
-from django.test import TestCase
 
+from . import PostgresSQLTestCase
 from .models import HStoreModel
 
+try:
+    from django.contrib.postgres import forms
+    from django.contrib.postgres.fields import HStoreField
+    from django.contrib.postgres.validators import KeysValidator
+except ImportError:
+    pass
 
-class SimpleTests(TestCase):
+
+class SimpleTests(PostgresSQLTestCase):
     apps = ['django.contrib.postgres']
 
     def test_save_load_success(self):
@@ -33,7 +37,7 @@ class SimpleTests(TestCase):
         self.assertEqual(reloaded.field, value)
 
 
-class TestQuerying(TestCase):
+class TestQuerying(PostgresSQLTestCase):
 
     def setUp(self):
         self.objs = [
@@ -111,7 +115,7 @@ class TestQuerying(TestCase):
         )
 
 
-class TestSerialization(TestCase):
+class TestSerialization(PostgresSQLTestCase):
     test_data = '[{"fields": {"field": "{\\"a\\": \\"b\\"}"}, "model": "postgres_tests.hstoremodel", "pk": null}]'
 
     def test_dumping(self):
@@ -124,7 +128,7 @@ class TestSerialization(TestCase):
         self.assertEqual(instance.field, {'a': 'b'})
 
 
-class TestValidation(TestCase):
+class TestValidation(PostgresSQLTestCase):
 
     def test_not_a_string(self):
         field = HStoreField()
@@ -134,7 +138,7 @@ class TestValidation(TestCase):
         self.assertEqual(cm.exception.message % cm.exception.params, 'The value of "a" is not a string.')
 
 
-class TestFormField(TestCase):
+class TestFormField(PostgresSQLTestCase):
 
     def test_valid(self):
         field = forms.HStoreField()
@@ -164,7 +168,7 @@ class TestFormField(TestCase):
         self.assertIsInstance(form_field, forms.HStoreField)
 
 
-class TestValidator(TestCase):
+class TestValidator(PostgresSQLTestCase):
 
     def test_simple_valid(self):
         validator = KeysValidator(keys=['a', 'b'])
diff --git a/tests/postgres_tests/test_ranges.py b/tests/postgres_tests/test_ranges.py
index d11f09d1a3..35b79f9dc4 100644
--- a/tests/postgres_tests/test_ranges.py
+++ b/tests/postgres_tests/test_ranges.py
@@ -2,23 +2,30 @@ import datetime
 import json
 import unittest
 
-from psycopg2.extras import DateRange, DateTimeTZRange, NumericRange
-
 from django import forms
-from django.contrib.postgres import fields as pg_fields, forms as pg_forms
-from django.contrib.postgres.validators import (
-    RangeMaxValueValidator, RangeMinValueValidator,
-)
 from django.core import exceptions, serializers
 from django.db import connection
 from django.test import TestCase
 from django.utils import timezone
 
+from . import PostgresSQLTestCase
 from .models import RangesModel
 
+try:
+    from psycopg2.extras import DateRange, DateTimeTZRange, NumericRange
+    from django.contrib.postgres import fields as pg_fields, forms as pg_forms
+    from django.contrib.postgres.validators import (
+        RangeMaxValueValidator, RangeMinValueValidator,
+    )
+except ImportError:
+    pass
+
 
 def skipUnlessPG92(test):
-    PG_VERSION = connection.pg_version
+    try:
+        PG_VERSION = connection.pg_version
+    except AttributeError:
+        PG_VERSION = 0
     if PG_VERSION < 90200:
         return unittest.skip('PostgreSQL >= 9.2 required')(test)
     return test
@@ -215,7 +222,7 @@ class TestSerialization(TestCase):
         self.assertEqual(instance.dates, None)
 
 
-class TestValidators(TestCase):
+class TestValidators(PostgresSQLTestCase):
 
     def test_max(self):
         validator = RangeMaxValueValidator(5)
@@ -234,7 +241,7 @@ class TestValidators(TestCase):
         self.assertEqual(cm.exception.code, 'min_value')
 
 
-class TestFormField(TestCase):
+class TestFormField(PostgresSQLTestCase):
 
     def test_valid_integer(self):
         field = pg_forms.IntegerRangeField()
@@ -493,7 +500,7 @@ class TestFormField(TestCase):
         self.assertIsInstance(form_field, pg_forms.DateTimeRangeField)
 
 
-class TestWidget(TestCase):
+class TestWidget(PostgresSQLTestCase):
     def test_range_widget(self):
         f = pg_forms.ranges.DateTimeRangeField()
         self.assertHTMLEqual(
diff --git a/tests/postgres_tests/test_unaccent.py b/tests/postgres_tests/test_unaccent.py
index ba65155301..af1618d183 100644
--- a/tests/postgres_tests/test_unaccent.py
+++ b/tests/postgres_tests/test_unaccent.py
@@ -1,13 +1,14 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from django.test import TestCase, modify_settings
+from django.test import modify_settings
 
+from . import PostgresSQLTestCase
 from .models import CharFieldModel, TextFieldModel
 
 
 @modify_settings(INSTALLED_APPS={'append': 'django.contrib.postgres'})
-class UnaccentTest(TestCase):
+class UnaccentTest(PostgresSQLTestCase):
 
     Model = CharFieldModel
 
diff --git a/tests/runtests.py b/tests/runtests.py
index a1c1dfdb1b..db0e09c162 100755
--- a/tests/runtests.py
+++ b/tests/runtests.py
@@ -84,8 +84,6 @@ def get_test_modules():
                     os.path.isfile(f) or
                     not os.path.exists(os.path.join(dirpath, f, '__init__.py'))):
                 continue
-            if connection.vendor != 'postgresql' and f == 'postgres_tests':
-                continue
             modules.append((modpath, f))
     return modules