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OpenStack Study: test_service.py

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# Administrator of the National Aeronautics and Space Administration.

# 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.

"""

Unit Tests for remote procedure calls using queue

"""

import mock

import mox

from oslo.config import cfg

from cinder import context

from cinder import db

from cinder import exception

from cinder import manager

from cinder import service

from cinder import test

from cinder import wsgi

test_service_opts = [

cfg.StrOpt("fake_manager",

default="cinder.tests.test_service.FakeManager",

help="Manager for testing"),

cfg.StrOpt("test_service_listen",

default=None,

help="Host to bind test service to"),

cfg.IntOpt("test_service_listen_port",

default=0,

help="Port number to bind test service to"), ]

CONF = cfg.CONF

CONF.register_opts(test_service_opts)

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class FakeManager(manager.Manager):

"""Fake manager for tests."""

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def __init__(self, host=None,

db_driver=None, service_name=None):

super(FakeManager, self).__init__(host=host,

db_driver=db_driver)

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def test_method(self):

return 'manager'

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class ExtendedService(service.Service):

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def test_method(self):

return 'service'

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class ServiceManagerTestCase(test.TestCase):

"""Test cases for Services."""

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def test_message_gets_to_manager(self):

serv = service.Service('test',

'test',

'cinder.tests.test_service.FakeManager')

serv.start()

self.assertEqual(serv.test_method(), 'manager')

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def test_override_manager_method(self):

serv = ExtendedService('test',

'test',

'cinder.tests.test_service.FakeManager')

serv.start()

self.assertEqual(serv.test_method(), 'service')

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class ServiceFlagsTestCase(test.TestCase):

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def test_service_enabled_on_create_based_on_flag(self):

self.flags(enable_new_services=True)

host = 'foo'

binary = 'cinder-fake'

app = service.Service.create(host=host, binary=binary)

app.start()

app.stop()

ref = db.service_get(context.get_admin_context(), app.service_id)

db.service_destroy(context.get_admin_context(), app.service_id)

self.assertFalse(ref['disabled'])

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def test_service_disabled_on_create_based_on_flag(self):

self.flags(enable_new_services=False)

host = 'foo'

binary = 'cinder-fake'

app = service.Service.create(host=host, binary=binary)

app.start()

app.stop()

ref = db.service_get(context.get_admin_context(), app.service_id)

db.service_destroy(context.get_admin_context(), app.service_id)

self.assertTrue(ref['disabled'])

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class ServiceTestCase(test.TestCase):

"""Test cases for Services."""

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def setUp(self):

super(ServiceTestCase, self).setUp()

self.mox.StubOutWithMock(service, 'db')

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def test_create(self):

host = 'foo'

binary = 'cinder-fake'

topic = 'fake'

# NOTE(vish): Create was moved out of mox replay to make sure that

# the looping calls are created in StartService.

app = service.Service.create(host=host, binary=binary, topic=topic)

self.assertTrue(app)

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def test_report_state_newly_disconnected(self):

host = 'foo'

binary = 'bar'

topic = 'test'

service_create = {'host': host,

'binary': binary,

'topic': topic,

'report_count': 0,

'availability_zone': 'nova'}

service_ref = {'host': host,

'binary': binary,

'topic': topic,

'report_count': 0,

'availability_zone': 'nova',

'id': 1}

service.db.service_get_by_args(mox.IgnoreArg(),

host,

binary).AndRaise(exception.NotFound())

service.db.service_create(mox.IgnoreArg(),

service_create).AndReturn(service_ref)

service.db.service_get(mox.IgnoreArg(),

mox.IgnoreArg()).AndRaise(Exception())

self.mox.ReplayAll()

serv = service.Service(host,

binary,

topic,

'cinder.tests.test_service.FakeManager')

serv.start()

serv.report_state()

self.assertTrue(serv.model_disconnected)

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def test_report_state_newly_connected(self):

host = 'foo'

binary = 'bar'

topic = 'test'

service_create = {'host': host,

'binary': binary,

'topic': topic,

'report_count': 0,

'availability_zone': 'nova'}

service_ref = {'host': host,

'binary': binary,

'topic': topic,

'report_count': 0,

'availability_zone': 'nova',

'id': 1}

service.db.service_get_by_args(mox.IgnoreArg(),

host,

binary).AndRaise(exception.NotFound())

service.db.service_create(mox.IgnoreArg(),

service_create).AndReturn(service_ref)

service.db.service_get(mox.IgnoreArg(),

service_ref['id']).AndReturn(service_ref)

service.db.service_update(mox.IgnoreArg(), service_ref['id'],

mox.ContainsKeyValue('report_count', 1))

self.mox.ReplayAll()

serv = service.Service(host,

binary,

topic,

'cinder.tests.test_service.FakeManager')

serv.start()

serv.model_disconnected = True

serv.report_state()

self.assertFalse(serv.model_disconnected)

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def test_service_with_long_report_interval(self):

CONF.set_override('service_down_time', 10)

CONF.set_override('report_interval', 10)

service.Service.create(binary="test_service",

manager="cinder.tests.test_service.FakeManager")

self.assertEqual(CONF.service_down_time, 25)

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class TestWSGIService(test.TestCase):

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def setUp(self):

super(TestWSGIService, self).setUp()

self.stubs.Set(wsgi.Loader, "load_app", mox.MockAnything())

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def test_service_random_port(self):

test_service = service.WSGIService("test_service")

self.assertEqual(0, test_service.port)

test_service.start()

self.assertNotEqual(0, test_service.port)

test_service.stop()

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class OSCompatibilityTestCase(test.TestCase):

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def _test_service_launcher(self, fake_os):

# Note(lpetrut): The cinder-volume service needs to be spawned

# differently on Windows due to an eventlet bug. For this reason,

# we must check the process launcher used.

fake_process_launcher = mock.MagicMock()

with mock.patch('os.name', fake_os):

with mock.patch('cinder.service.process_launcher',

fake_process_launcher):

launcher = service.get_launcher()

if fake_os == 'nt':

self.assertEqual(type(launcher),

service.Launcher)

else:

self.assertEqual(launcher,

fake_process_launcher())

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def test_process_launcher_on_windows(self):

self._test_service_launcher('nt')

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def test_process_launcher_on_linux(self):

self._test_service_launcher('posix')