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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import inspect
import fixtures
from webob.util import status_reasons
from nova import exception
from nova import test
class NovaExceptionTestCase(test.NoDBTestCase):
def test_default_error_msg(self):
class FakeNovaException(exception.NovaException):
msg_fmt = "default message"
exc = FakeNovaException()
self.assertEqual('default message', str(exc))
def test_error_msg(self):
self.assertEqual('test', str(exception.NovaException('test')))
self.assertEqual('test',
exception.NovaException(Exception('test')).message)
def test_default_error_msg_with_kwargs(self):
class FakeNovaException(exception.NovaException):
msg_fmt = "default message: %(code)s"
exc = FakeNovaException(code=500)
self.assertEqual('default message: 500', str(exc))
self.assertEqual('default message: 500', exc.message)
def test_error_msg_exception_with_kwargs(self):
class FakeNovaException(exception.NovaException):
msg_fmt = "default message: %(misspelled_code)s"
exc = FakeNovaException(code=500, misspelled_code='blah')
self.assertEqual('default message: blah', str(exc))
self.assertEqual('default message: blah', exc.message)
def test_default_error_code(self):
class FakeNovaException(exception.NovaException):
code = 404
exc = FakeNovaException()
self.assertEqual(404, exc.kwargs['code'])
def test_error_code_from_kwarg(self):
class FakeNovaException(exception.NovaException):
code = 500
exc = FakeNovaException(code=404)
self.assertEqual(exc.kwargs['code'], 404)
def test_format_message_local(self):
class FakeNovaException(exception.NovaException):
msg_fmt = "some message"
exc = FakeNovaException()
self.assertEqual(str(exc), exc.format_message())
def test_format_message_remote(self):
class FakeNovaException_Remote(exception.NovaException):
msg_fmt = "some message"
def __str__(self):
return "print the whole trace"
exc = FakeNovaException_Remote()
self.assertEqual(u"print the whole trace", str(exc))
self.assertEqual("some message", exc.format_message())
def test_format_message_remote_error(self):
# NOTE(melwitt): This test checks that errors are formatted as expected
# in a real environment where format errors are caught and not
# reraised, so we patch in the real implementation.
self.useFixture(fixtures.MonkeyPatch(
'nova.exception.NovaException._log_exception',
test.NovaExceptionReraiseFormatError.real_log_exception))
class FakeNovaException_Remote(exception.NovaException):
msg_fmt = "some message %(somearg)s"
exc = FakeNovaException_Remote(lame_arg='lame')
self.assertEqual("some message %(somearg)s", exc.format_message())
def test_repr(self):
class FakeNovaException(exception.NovaException):
msg_fmt = "some message"
mock_exc = FakeNovaException(code=500)
exc_repr = repr(mock_exc)
eval_repr = eval(exc_repr)
exc_kwargs = eval_repr.get('kwargs')
self.assertIsNotNone(exc_kwargs)
self.assertEqual(500, exc_kwargs.get('code'))
self.assertEqual('some message', eval_repr.get('message'))
self.assertEqual('FakeNovaException', eval_repr.get('class'))
class ConvertedExceptionTestCase(test.NoDBTestCase):
def test_instantiate(self):
exc = exception.ConvertedException(400, 'Bad Request', 'reason')
self.assertEqual(exc.code, 400)
self.assertEqual(exc.title, 'Bad Request')
self.assertEqual(exc.explanation, 'reason')
def test_instantiate_without_title_known_code(self):
exc = exception.ConvertedException(500)
self.assertEqual(exc.title, status_reasons[500])
def test_instantiate_without_title_unknown_code(self):
exc = exception.ConvertedException(499)
self.assertEqual(exc.title, 'Unknown Client Error')
def test_instantiate_bad_code(self):
self.assertRaises(KeyError, exception.ConvertedException, 10)
class ExceptionTestCase(test.NoDBTestCase):
@staticmethod
def _raise_exc(exc):
raise exc(500)
def test_exceptions_raise(self):
# NOTE(dprince): disable format errors since we are not passing kwargs
for name in dir(exception):
exc = getattr(exception, name)
if isinstance(exc, type):
self.assertRaises(exc, self._raise_exc, exc)
class ExceptionValidMessageTestCase(test.NoDBTestCase):
def test_messages(self):
failures = []
for name, obj in inspect.getmembers(exception):
if name in ['NovaException', 'InstanceFaultRollback']:
continue
if not inspect.isclass(obj):
continue
if not issubclass(obj, exception.NovaException):
continue
e = obj
if e.msg_fmt == "An unknown exception occurred.":
failures.append('%s needs a more specific msg_fmt' % name)
if failures:
self.fail('\n'.join(failures))
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