122 lines
3.5 KiB
Python
122 lines
3.5 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright (c) 2012 OpenStack Foundation
|
|
# 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.
|
|
|
|
"""Tests for hook customization."""
|
|
|
|
import stevedore
|
|
|
|
from nova import hooks
|
|
from nova import test
|
|
|
|
|
|
class SampleHookA(object):
|
|
name = "a"
|
|
|
|
def _add_called(self, op, kwargs):
|
|
called = kwargs.get('called', None)
|
|
if called is not None:
|
|
called.append(op + self.name)
|
|
|
|
def pre(self, *args, **kwargs):
|
|
self._add_called("pre", kwargs)
|
|
|
|
|
|
class SampleHookB(SampleHookA):
|
|
name = "b"
|
|
|
|
def post(self, rv, *args, **kwargs):
|
|
self._add_called("post", kwargs)
|
|
|
|
|
|
class SampleHookC(SampleHookA):
|
|
name = "c"
|
|
|
|
def pre(self, f, *args, **kwargs):
|
|
self._add_called("pre" + f.__name__, kwargs)
|
|
|
|
def post(self, f, rv, *args, **kwargs):
|
|
self._add_called("post" + f.__name__, kwargs)
|
|
|
|
|
|
class MockEntryPoint(object):
|
|
|
|
def __init__(self, cls):
|
|
self.cls = cls
|
|
|
|
def load(self):
|
|
return self.cls
|
|
|
|
|
|
class HookTestCase(test.NoDBTestCase):
|
|
|
|
def _mock_load_plugins(self, iload, iargs, ikwargs):
|
|
return [
|
|
stevedore.extension.Extension('test_hook',
|
|
MockEntryPoint(SampleHookA), SampleHookA, SampleHookA()),
|
|
stevedore.extension.Extension('test_hook',
|
|
MockEntryPoint(SampleHookB), SampleHookB, SampleHookB()),
|
|
]
|
|
|
|
def setUp(self):
|
|
super(HookTestCase, self).setUp()
|
|
|
|
hooks.reset()
|
|
|
|
self.stubs.Set(stevedore.extension.ExtensionManager, '_load_plugins',
|
|
self._mock_load_plugins)
|
|
|
|
@hooks.add_hook('test_hook')
|
|
def _hooked(self, a, b=1, c=2, called=None):
|
|
return 42
|
|
|
|
def test_basic(self):
|
|
self.assertEqual(42, self._hooked(1))
|
|
|
|
mgr = hooks._HOOKS['test_hook']
|
|
self.assertEqual(2, len(mgr.extensions))
|
|
self.assertEqual(SampleHookA, mgr.extensions[0].plugin)
|
|
self.assertEqual(SampleHookB, mgr.extensions[1].plugin)
|
|
|
|
def test_order_of_execution(self):
|
|
called_order = []
|
|
self._hooked(42, called=called_order)
|
|
self.assertEqual(['prea', 'preb', 'postb'], called_order)
|
|
|
|
|
|
class HookTestCaseWithFunction(HookTestCase):
|
|
def _mock_load_plugins(self, iload, iargs, ikwargs):
|
|
return [
|
|
stevedore.extension.Extension('function_hook',
|
|
MockEntryPoint(SampleHookC), SampleHookC, SampleHookC()),
|
|
]
|
|
|
|
@hooks.add_hook('function_hook', pass_function=True)
|
|
def _hooked(self, a, b=1, c=2, called=None):
|
|
return 42
|
|
|
|
def test_basic(self):
|
|
self.assertEqual(42, self._hooked(1))
|
|
mgr = hooks._HOOKS['function_hook']
|
|
|
|
self.assertEqual(1, len(mgr.extensions))
|
|
self.assertEqual(SampleHookC, mgr.extensions[0].plugin)
|
|
|
|
def test_order_of_execution(self):
|
|
called_order = []
|
|
self._hooked(42, called=called_order)
|
|
self.assertEqual(['pre_hookedc', 'post_hookedc'], called_order)
|