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add UsePreviousValue support for parameters when updating a CloudFormation stack (#1504)

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Ben Jones 2018-03-21 11:13:05 -05:00 • committed by Jack Danger
commit c13f77173f
2 changed files with 37 additions and 3 deletions
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27
tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
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@ -276,6 +276,33 @@ def test_create_stack_from_s3_url():
json.loads(dummy_template_json, object_pairs_hook=OrderedDict))
@mock_cloudformation
def test_update_stack_with_previous_value():
name = 'update_stack_with_previous_value'
cf_conn = boto3.client('cloudformation', region_name='us-east-1')
cf_conn.create_stack(
StackName=name, TemplateBody=dummy_template_yaml_with_ref,
Parameters=[
{'ParameterKey': 'TagName', 'ParameterValue': 'foo'},
{'ParameterKey': 'TagDescription', 'ParameterValue': 'bar'},
]
)
cf_conn.update_stack(
StackName=name, UsePreviousTemplate=True,
Parameters=[
{'ParameterKey': 'TagName', 'UsePreviousValue': True},
{'ParameterKey': 'TagDescription', 'ParameterValue': 'not bar'},
]
)
stack = cf_conn.describe_stacks(StackName=name)['Stacks'][0]
tag_name = [x['ParameterValue'] for x in stack['Parameters']
if x['ParameterKey'] == 'TagName'][0]
tag_desc = [x['ParameterValue'] for x in stack['Parameters']
if x['ParameterKey'] == 'TagDescription'][0]
assert tag_name == 'foo'
assert tag_desc == 'not bar'
@mock_cloudformation
@mock_s3
@mock_ec2