#
#    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.


b_uuid = None

def store_b_uuid():
    global b_uuid
    b_uuid = next(iter(reality.resources_by_logical_name('B'))).uuid

def check_b_not_replaced():
    test.assertEqual(b_uuid,
                     next(iter(reality.resources_by_logical_name('B'))).uuid)
    test.assertIsNotNone(b_uuid)

example_template = Template({
    'A': RsrcDef({}, []),
    'B': RsrcDef({}, []),
    'C': RsrcDef({'a': '4alpha'}, ['A', 'B']),
    'D': RsrcDef({'c': GetRes('C')}, []),
    'E': RsrcDef({'ca': GetAtt('C', 'a')}, []),
})
engine.create_stack('foo', example_template)
engine.noop(5)
engine.call(verify, example_template)
engine.call(store_b_uuid)

example_template2 = Template({
    'A': RsrcDef({}, []),
    'C': RsrcDef({'a': '4alpha'}, ['A']),
    'D': RsrcDef({'c': GetRes('C')}, []),
    'E': RsrcDef({'ca': GetAtt('C', 'a')}, []),
})
engine.update_stack('foo', example_template2)
engine.noop(2)

engine.rollback_stack('foo')
engine.noop(10)

engine.call(verify, example_template)
engine.call(check_b_not_replaced)