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from unittest import skipUnless
from django.db import connection
from django.test import TestCase, mock
class TestDatabaseFeatures(TestCase):
def test_nonexistent_feature(self):
self.assertFalse(hasattr(connection.features, 'nonexistent'))
@skipUnless(connection.vendor == 'mysql', 'MySQL backend tests')
class TestMySQLFeatures(TestCase):
def test_mysql_supports_transactions(self):
"""
All storage engines except MyISAM support transactions.
"""
with mock.patch('django.db.connection.features._mysql_storage_engine', 'InnoDB'):
self.assertTrue(connection.features.supports_transactions)
del connection.features.supports_transactions
with mock.patch('django.db.connection.features._mysql_storage_engine', 'MyISAM'):
self.assertFalse(connection.features.supports_transactions)
del connection.features.supports_transactions
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