How to use test_serialized_rollback method in pytest-django

Best Python code snippet using pytest-django_python

test_database.py

Source:test_database.py

...92        result = django_testdir.runpytest_subprocess("-v", "--reuse-db")93        result.stdout.fnmatch_lines(94            ["*test_django_db_reset_sequences_requested PASSED*"]95        )96    def test_serialized_rollback(self, db: None, django_testdir) -> None:97        django_testdir.create_app_file(98            """99            from django.db import migrations100            def load_data(apps, schema_editor):101                Item = apps.get_model("app", "Item")102                Item.objects.create(name="loaded-in-migration")103            class Migration(migrations.Migration):104                dependencies = [105                    ("app", "0001_initial"),106                ]107                operations = [108                    migrations.RunPython(load_data),109                ]110            """,111            "migrations/0002_data_migration.py",112        )113        django_testdir.create_test_module(114            """115            import pytest116            from .app.models import Item117            @pytest.mark.django_db(transaction=True, serialized_rollback=True)118            def test_serialized_rollback_1():119                assert Item.objects.filter(name="loaded-in-migration").exists()120            @pytest.mark.django_db(transaction=True)121            def test_serialized_rollback_2(django_db_serialized_rollback):122                assert Item.objects.filter(name="loaded-in-migration").exists()123                Item.objects.create(name="test2")124            @pytest.mark.django_db(transaction=True, serialized_rollback=True)125            def test_serialized_rollback_3():126                assert Item.objects.filter(name="loaded-in-migration").exists()127                assert not Item.objects.filter(name="test2").exists()128            """129        )130        result = django_testdir.runpytest_subprocess("-v")131        assert result.ret == 0132    @pytest.fixture133    def mydb(self, all_dbs: None) -> None:134        # This fixture must be able to access the database135        Item.objects.create(name="spam")136    def test_mydb(self, mydb: None) -> None:137        if not connection.features.supports_transactions:138            pytest.skip("transactions required for this test")139        # Check the fixture had access to the db140        item = Item.objects.get(name="spam")141        assert item142    def test_fixture_clean(self, all_dbs: None) -> None:143        # Relies on the order: test_mydb created an object144        # See https://github.com/pytest-dev/pytest-django/issues/17145        assert Item.objects.count() == 0146    @pytest.fixture147    def fin(self, request, all_dbs: None) -> None:148        # This finalizer must be able to access the database149        request.addfinalizer(lambda: Item.objects.create(name="spam"))150    def test_fin(self, fin: None) -> None:151        # Check finalizer has db access (teardown will fail if not)152        pass153    @pytest.mark.skipif(get_django_version() < (3, 2), reason="Django >= 3.2 required")154    def test_durable_transactions(self, all_dbs: None) -> None:155        with transaction.atomic(durable=True):156            item = Item.objects.create(name="foo")157        assert Item.objects.get() == item158class TestDatabaseFixturesAllOrder:159    @pytest.fixture160    def fixture_with_db(self, db: None) -> None:161        Item.objects.create(name="spam")162    @pytest.fixture163    def fixture_with_transdb(self, transactional_db: None) -> None:164        Item.objects.create(name="spam")165    @pytest.fixture166    def fixture_with_reset_sequences(self, django_db_reset_sequences: None) -> None:167        Item.objects.create(name="spam")168    @pytest.fixture169    def fixture_with_serialized_rollback(self, django_db_serialized_rollback: None) -> None:170        Item.objects.create(name="ham")171    def test_trans(self, fixture_with_transdb: None) -> None:172        pass173    def test_db(self, fixture_with_db: None) -> None:174        pass175    def test_db_trans(self, fixture_with_db: None, fixture_with_transdb: None) -> None:176        pass177    def test_trans_db(self, fixture_with_transdb: None, fixture_with_db: None) -> None:178        pass179    def test_reset_sequences(180        self,181        fixture_with_reset_sequences: None,182        fixture_with_transdb: None,183        fixture_with_db: None,184    ) -> None:185        pass186    # The test works when transactions are not supported, but it interacts187    # badly with other tests.188    @pytest.mark.skipif('not connection.features.supports_transactions')189    def test_serialized_rollback(190        self,191        fixture_with_serialized_rollback: None,192        fixture_with_db: None,193    ) -> None:194        pass195class TestDatabaseMarker:196    "Tests for the django_db marker."197    @pytest.mark.django_db198    def test_access(self) -> None:199        Item.objects.create(name="spam")200    @pytest.mark.django_db201    def test_clean_db(self) -> None:202        # Relies on the order: test_access created an object.203        assert Item.objects.count() == 0...

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