def test_multi_exception_raised_on_exceed(self):
# limit retries so this doesn't take 40 seconds
retry_fixture = fixture.DBRetryErrorsFixture(max_retries=2)
retry_fixture.setUp()
e = exceptions.MultipleExceptions([ValueError(), db_exc.DBDeadlock()])
with testtools.ExpectedException(exceptions.MultipleExceptions):
self._decorated_function(db_api.MAX_RETRIES + 1, e)
retry_fixture.cleanUp()
def test__create_dvr_mac_address_retries_exceeded_retry_logic(self):
# limit retries so test doesn't take 40 seconds
retry_fixture = fixture.DBRetryErrorsFixture(max_retries=2)
retry_fixture.setUp()
non_unique_mac = tools.get_random_EUI()
self._create_dvr_mac_entry('foo_host_1', non_unique_mac)
with mock.patch.object(net, 'get_random_mac') as f:
f.return_value = non_unique_mac
self.assertRaises(lib_exc.HostMacAddressGenerationFailure,
self.mixin._create_dvr_mac_address, self.ctx,
"foo_host_2")
retry_fixture.cleanUp()
def _test_db_exceptions_handled(self, method, mock_object, expect_retries):
# NOTE(mpeterson): make retries faster so it doesn't take a lot.
retry_fixture = lib_fixtures.DBRetryErrorsFixture(
max_retries=RETRY_MAX, retry_interval=RETRY_INTERVAL)
retry_fixture.setUp()
# NOTE(mpeterson): this test is very verbose, disabling logging
logging.disable(logging.CRITICAL)
self.addCleanup(logging.disable, logging.NOTSET)
exceptions = RETRIABLE_EXCEPTIONS
r_method = getattr(method, '__wrapped__', method)
r_method_args = p_util.getargspec(r_method).args
args_number = len(r_method_args) - (2 if r_method_args[0] == 'self'
else 1)
mock_arg = mock.MagicMock(unsafe=True)
# NOTE(mpeterson): workarounds for py3 compatibility and behavior
# expected by particular functions
mock_arg.__name__ = 'mock_arg'
mock_arg.retry_count = 1
mock_arg.__ge__.return_value = True
mock_arg.__gt__.return_value = True
mock_arg.__le__.return_value = True
mock_arg.__lt__.return_value = True
args = (mock_arg, ) * args_number
def _assertRaises(exceptions, method, context, *args, **kwargs):
try:
method(context, *args, **kwargs)
except Exception as e:
if not isinstance(e, exceptions):
raise e
# TODO(mpeterson): For now the check with session.is_active is
# accepted, but when the enginefacade is the only accepted
# pattern then it should be changed to check that a session is
# attached to the context
session = context.session
if session.is_active and isinstance(e, _InnerException):
self.assertTrue(getattr(e, '_RETRY_EXCEEDED', False))
return
exc_names = (tuple(exc.__name__ for exc in exceptions) if hasattr(
exceptions, '__iter__') else exceptions.__name__)
self.fail('%s did not raise %s' % (method.__name__, exc_names))
try:
raise _InnerException
except _InnerException as e:
_e = e
expected_retries = RETRY_MAX if expect_retries else 0
# TODO(mpeterson): Make this an int when Py2 is no longer supported
# and use the `nonlocal` directive
retry_counter = [0]
for exception in exceptions:
def increase_retry_counter_and_except(*args, **kwargs):
retry_counter[0] += 1
self.db_context.session.add(self.retry_tracker())
self.db_context.session.flush()
raise exception(_e)
mock_object.side_effect = increase_retry_counter_and_except
_assertRaises((exception, _InnerException), method,
self.db_context, *args)
self.assertEqual(expected_retries, mock_object.call_count - 1)
mock_object.reset_mock()
retry_fixture.cleanUp()
return retry_counter[0]
def _test_db_exceptions_handled(self, method, mock_object,
receives_context, expect_retries):
# NOTE(mpeterson): make retries faster so it doesn't take a lot.
retry_fixture = lib_fixtures.DBRetryErrorsFixture(
max_retries=RETRY_MAX, retry_interval=RETRY_INTERVAL)
retry_fixture.setUp()
# NOTE(mpeterson): this test is very verbose, disabling logging
logging.disable(logging.CRITICAL)
self.addCleanup(logging.disable, logging.NOTSET)
exceptions = RETRIABLE_EXCEPTIONS
r_method = getattr(method, '__wrapped__', method)
r_method_args = p_util.getargspec(r_method).args
args_number = len(r_method_args) - (2 if r_method_args[0] == 'self'
else 1)
mock_arg = mock.MagicMock(unsafe=True)
# NOTE(mpeterson): workarounds for py3 compatibility and behavior
# expected by particular functions
mock_arg.__name__ = 'mock_arg'
mock_arg.retry_count = 1
mock_arg.__ge__.return_value = True
mock_arg.__gt__.return_value = True
mock_arg.__le__.return_value = True
mock_arg.__lt__.return_value = True
args = (mock_arg, ) * args_number
def _assertRaises(exceptions, method, *args, **kwargs):
try:
method(*args, **kwargs)
except Exception as e:
if not isinstance(e, exceptions):
raise e
session = args[0].session if receives_context else args[0]
if session.is_active and isinstance(e, _InnerException):
self.assertTrue(getattr(e, '_RETRY_EXCEEDED', False))
return
exc_names = (tuple(exc.__name__ for exc in exceptions) if hasattr(
exceptions, '__iter__') else exceptions.__name__)
self.fail('%s did not raise %s' % (method.__name__, exc_names))
try:
raise _InnerException
except _InnerException as e:
_e = e
expected_retries = RETRY_MAX if expect_retries else 0
db_object = self.db_context if receives_context else self.db_session
for exception in exceptions:
mock_object.side_effect = exception(_e)
_assertRaises((exception, _InnerException), method, db_object,
*args)
self.assertEqual(expected_retries, mock_object.call_count - 1)
mock_object.reset_mock()
retry_fixture.cleanUp()
