104 lines
4.0 KiB
Python
104 lines
4.0 KiB
Python
#
|
|
# 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 functools
|
|
import itertools
|
|
|
|
from heat.common import short_id
|
|
from heat.scaling import template
|
|
from heat.tests import common
|
|
|
|
|
|
class ResourceTemplatesTest(common.HeatTestCase):
|
|
|
|
def setUp(self):
|
|
super(ResourceTemplatesTest, self).setUp()
|
|
ids = ('stubbed-id-%s' % (i,) for i in itertools.count())
|
|
self.patchobject(
|
|
short_id, 'generate_id').side_effect = functools.partial(next,
|
|
ids)
|
|
|
|
def test_create_template(self):
|
|
"""
|
|
When creating a template from scratch, an empty list is accepted as
|
|
the "old" resources and new resources are created up to num_resource.
|
|
"""
|
|
templates = template.resource_templates([], {'type': 'Foo'}, 2, 0)
|
|
expected = [
|
|
('stubbed-id-0', {'type': 'Foo'}),
|
|
('stubbed-id-1', {'type': 'Foo'})]
|
|
self.assertEqual(expected, list(templates))
|
|
|
|
def test_replace_template(self):
|
|
"""
|
|
If num_replace is the number of old resources, then all of the
|
|
resources will be replaced.
|
|
"""
|
|
old_resources = [
|
|
('old-id-0', {'type': 'Foo'}),
|
|
('old-id-1', {'type': 'Foo'})]
|
|
templates = template.resource_templates(old_resources, {'type': 'Bar'},
|
|
1, 2)
|
|
expected = [('old-id-1', {'type': 'Bar'})]
|
|
self.assertEqual(expected, list(templates))
|
|
|
|
def test_replace_some_units(self):
|
|
"""
|
|
If the resource definition changes, only the number of replacements
|
|
specified will be made; beyond that, the original templates are used.
|
|
"""
|
|
old_resources = [
|
|
('old-id-0', {'type': 'Foo'}),
|
|
('old-id-1', {'type': 'Foo'})]
|
|
new_spec = {'type': 'Bar'}
|
|
templates = template.resource_templates(old_resources, new_spec, 2, 1)
|
|
expected = [
|
|
('old-id-0', {'type': 'Bar'}),
|
|
('old-id-1', {'type': 'Foo'})]
|
|
self.assertEqual(expected, list(templates))
|
|
|
|
def test_growth_counts_as_replacement(self):
|
|
"""
|
|
If we grow the template and replace some elements at the same time, the
|
|
number of replacements to perform is reduced by the number of new
|
|
resources to be created.
|
|
"""
|
|
spec = {'type': 'Foo'}
|
|
old_resources = [
|
|
('old-id-0', spec),
|
|
('old-id-1', spec)]
|
|
new_spec = {'type': 'Bar'}
|
|
templates = template.resource_templates(old_resources, new_spec, 4, 2)
|
|
expected = [
|
|
('old-id-0', spec),
|
|
('old-id-1', spec),
|
|
('stubbed-id-0', new_spec),
|
|
('stubbed-id-1', new_spec)]
|
|
self.assertEqual(expected, list(templates))
|
|
|
|
def test_replace_units_some_already_up_to_date(self):
|
|
"""
|
|
If some of the old resources already have the new resource definition,
|
|
then they won't be considered for replacement, and the next resource
|
|
that is out-of-date will be replaced.
|
|
"""
|
|
old_resources = [
|
|
('old-id-0', {'type': 'Bar'}),
|
|
('old-id-1', {'type': 'Foo'})]
|
|
new_spec = {'type': 'Bar'}
|
|
templates = template.resource_templates(old_resources, new_spec, 2, 1)
|
|
second_batch_expected = [
|
|
('old-id-0', {'type': 'Bar'}),
|
|
('old-id-1', {'type': 'Bar'})]
|
|
self.assertEqual(second_batch_expected, list(templates))
|