OpenStack Study: test_misc.py

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# Copyright 2010 OpenStack Foundation

#

# 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 glob

import os

from cinder import exception

from cinder import test

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class ExceptionTestCase(test.TestCase):

@staticmethod

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    def _raise_exc(exc):

        raise exc()

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    def test_exceptions_raise(self):

        # NOTE(dprince): disable format errors since we are not passing kwargs

        self.flags(fatal_exception_format_errors=False)

        for name in dir(exception):

            exc = getattr(exception, name)

            if isinstance(exc, type):

                self.assertRaises(exc, self._raise_exc, exc)

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class ProjectTestCase(test.TestCase):

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    def test_all_migrations_have_downgrade(self):

        topdir = os.path.normpath(os.path.dirname(__file__) + '/../../')

        py_glob = os.path.join(topdir, "cinder", "db", "sqlalchemy",

                               "migrate_repo", "versions", "*.py")

        missing_downgrade = []

        for path in glob.iglob(py_glob):

            has_upgrade = False

            has_downgrade = False

            with open(path, "r") as f:

                for line in f:

                    if 'def upgrade(' in line:

                        has_upgrade = True

                    if 'def downgrade(' in line:

                        has_downgrade = True

                if has_upgrade and not has_downgrade:

                    fname = os.path.basename(path)

                    missing_downgrade.append(fname)

        helpful_msg = (_("The following migrations are missing a downgrade:"

                         "\n\t%s") % '\n\t'.join(sorted(missing_downgrade)))

        self.assertFalse(missing_downgrade, msg=helpful_msg)