def test_raises_exception_from_callback(self):
def raise_exception():
"""Raises an Exception."""
raise Exception('uh-oh!')
with self.assertRaisesRegexp(Exception, 'uh-oh!'):
gae_datastore_services.transaction(raise_exception)
def test_returns_none_from_void_callback(self):
def do_nothing():
"""Does nothing."""
pass
self.assertIsNone(gae_datastore_services.transaction(do_nothing))
def test_returns_value_of_callback(self):
self.assertEqual(gae_datastore_services.transaction(lambda: 1), 1)
def test_returns_value_of_nested_transaction(self):
self.assertEqual(
gae_datastore_services.transaction(
lambda: gae_datastore_services.transaction(lambda: 1)), 1)
