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from unittest import mock
from django.db import connections
from django.test import TestCase, TransactionTestCase, override_settings
class TestSerializedRollbackInhibitsPostMigrate(TransactionTestCase):
"""
TransactionTestCase._fixture_teardown() inhibits the post_migrate signal
for test classes with serialized_rollback=True.
"""
available_apps = ['test_utils']
serialized_rollback = True
def setUp(self):
# self.available_apps must be None to test the serialized_rollback
# condition.
self.available_apps = None
def tearDown(self):
self.available_apps = ['test_utils']
@mock.patch('django.test.testcases.call_command')
def test(self, call_command):
# with a mocked call_command(), this doesn't have any effect.
self._fixture_teardown()
call_command.assert_called_with(
'flush', interactive=False, allow_cascade=False,
reset_sequences=False, inhibit_post_migrate=True,
database='default', verbosity=0,
)
@override_settings(DEBUG=True) # Enable query logging for test_queries_cleared
class TransactionTestCaseMultiDbTests(TestCase):
available_apps = []
multi_db = True
def test_queries_cleared(self):
"""
TransactionTestCase._pre_setup() clears the connections' queries_log
so that it's less likely to overflow. An overflow causes
assertNumQueries() to fail.
"""
for alias in connections:
self.assertEqual(len(connections[alias].queries_log), 0, 'Failed for alias %s' % alias)
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