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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 logging
import sys
import fixtures as fx
from oslo_config import cfg
import testtools
from nova.db.sqlalchemy import api as session
from nova.tests import fixtures
from nova.tests.unit import conf_fixture
CONF = cfg.CONF
class TestConfFixture(testtools.TestCase):
"""Test the Conf fixtures in Nova.
This is a basic test that this fixture works like we expect.
Expectations:
1. before using the fixture, a default value (api_paste_config)
comes through untouched.
2. before using the fixture, a known default value that we
override is correct.
3. after using the fixture a known value that we override is the
new value.
4. after using the fixture we can set a default value to something
random, and it will be reset once we are done.
There are 2 copies of this test so that you can verify they do the
right thing with:
tox -e py27 test_fixtures -- --concurrency=1
As regardless of run order, their initial asserts would be
impacted if the reset behavior isn't working correctly.
"""
def _test_override(self):
self.assertEqual(CONF.api_paste_config, 'api-paste.ini')
self.assertEqual(CONF.fake_network, False)
self.useFixture(conf_fixture.ConfFixture())
CONF.set_default('api_paste_config', 'foo')
self.assertEqual(CONF.fake_network, True)
def test_override1(self):
self._test_override()
def test_override2(self):
self._test_override()
class TestOutputStream(testtools.TestCase):
"""Ensure Output Stream capture works as expected.
This has the added benefit of providing a code example of how you
can manipulate the output stream in your own tests.
"""
def test_output(self):
self.useFixture(fx.EnvironmentVariable('OS_STDOUT_CAPTURE', '1'))
self.useFixture(fx.EnvironmentVariable('OS_STDERR_CAPTURE', '1'))
out = self.useFixture(fixtures.OutputStreamCapture())
sys.stdout.write("foo")
sys.stderr.write("bar")
self.assertEqual(out.stdout, "foo")
self.assertEqual(out.stderr, "bar")
# TODO(sdague): nuke the out and err buffers so it doesn't
# make it to testr
class TestLogging(testtools.TestCase):
def test_default_logging(self):
stdlog = self.useFixture(fixtures.StandardLogging())
root = logging.getLogger()
# there should be a null handler as well at DEBUG
self.assertEqual(len(root.handlers), 2, root.handlers)
log = logging.getLogger(__name__)
log.info("at info")
log.debug("at debug")
self.assertIn("at info", stdlog.logger.output)
self.assertNotIn("at debug", stdlog.logger.output)
# broken debug messages should still explode, even though we
# aren't logging them in the regular handler
self.assertRaises(TypeError, log.debug, "this is broken %s %s", "foo")
# and, ensure that one of the terrible log messages isn't
# output at info
warn_log = logging.getLogger('migrate.versioning.api')
warn_log.info("warn_log at info, should be skipped")
warn_log.error("warn_log at error")
self.assertIn("warn_log at error", stdlog.logger.output)
self.assertNotIn("warn_log at info", stdlog.logger.output)
def test_debug_logging(self):
self.useFixture(fx.EnvironmentVariable('OS_DEBUG', '1'))
stdlog = self.useFixture(fixtures.StandardLogging())
root = logging.getLogger()
# there should no longer be a null handler
self.assertEqual(len(root.handlers), 1, root.handlers)
log = logging.getLogger(__name__)
log.info("at info")
log.debug("at debug")
self.assertIn("at info", stdlog.logger.output)
self.assertIn("at debug", stdlog.logger.output)
class TestTimeout(testtools.TestCase):
"""Tests for our timeout fixture.
Testing the actual timeout mechanism is beyond the scope of this
test, because it's a pretty clear pass through to fixtures'
timeout fixture, which tested in their tree.
"""
def test_scaling(self):
# a bad scaling factor
self.assertRaises(ValueError, fixtures.Timeout, 1, 0.5)
# various things that should work.
timeout = fixtures.Timeout(10)
self.assertEqual(timeout.test_timeout, 10)
timeout = fixtures.Timeout("10")
self.assertEqual(timeout.test_timeout, 10)
timeout = fixtures.Timeout("10", 2)
self.assertEqual(timeout.test_timeout, 20)
class TestDatabaseFixture(testtools.TestCase):
def test_fixture_reset(self):
# because this sets up reasonable db connection strings
self.useFixture(conf_fixture.ConfFixture())
self.useFixture(fixtures.Database())
engine = session.get_engine()
conn = engine.connect()
result = conn.execute("select * from instance_types")
rows = result.fetchall()
self.assertEqual(len(rows), 5, "Rows %s" % rows)
# insert a 6th instance type, column 5 below is an int id
# which has a constraint on it, so if new standard instance
# types are added you have to bump it.
conn.execute("insert into instance_types VALUES "
"(NULL, NULL, NULL, 't1.test', 6, 4096, 2, 0, NULL, '87'"
", 1.0, 40, 0, 0, 1, 0)")
result = conn.execute("select * from instance_types")
rows = result.fetchall()
self.assertEqual(len(rows), 6, "Rows %s" % rows)
# reset by invoking the fixture again
#
# NOTE(sdague): it's important to reestablish the db
# connection because otherwise we have a reference to the old
# in mem db.
self.useFixture(fixtures.Database())
conn = engine.connect()
result = conn.execute("select * from instance_types")
rows = result.fetchall()
self.assertEqual(len(rows), 5, "Rows %s" % rows)
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