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When using a TransactionTestCase with serialized_rollback=True, after creating the database and running its migrations (along with emitting the post_migrate signal), the contents of the database are serialized to _test_serialized_contents. After the first test case, _fixture_teardown() would flush the tables but then the post_migrate signal would be emitted and new rows (with new PKs) would be created in the django_content_type table. Then in any subsequent test cases in a suite, _fixture_setup() attempts to deserialize the content of _test_serialized_contents, but these rows are identical to the rows already in the database except for their PKs. This causes an IntegrityError due to the unique constraint in the django_content_type table. This change made it so that in the above scenario the post_migrate signal is not emitted after flushing the tables, since it will be repopulated during fixture_setup().
29 lines
968 B
Python
29 lines
968 B
Python
from django.test import TransactionTestCase, mock
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class TestSerializedRollbackInhibitsPostMigrate(TransactionTestCase):
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"""
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TransactionTestCase._fixture_teardown() inhibits the post_migrate signal
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for test classes with serialized_rollback=True.
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"""
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available_apps = ['test_utils']
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serialized_rollback = True
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def setUp(self):
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# self.available_apps must be None to test the serialized_rollback
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# condition.
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self.available_apps = None
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def tearDown(self):
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self.available_apps = ['test_utils']
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@mock.patch('django.test.testcases.call_command')
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def test(self, call_command):
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# with a mocked call_command(), this doesn't have any effect.
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self._fixture_teardown()
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call_command.assert_called_with(
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'flush', interactive=False, allow_cascade=False,
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reset_sequences=False, inhibit_post_migrate=True,
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database='default', verbosity=0,
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)
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