'When a create fails, getting the attributes returns None.'

def test_failed_create(self):

    template = copy.deepcopy(self.webhook_template)
    template['Resources']['my_webhook']['Properties']['policy'] = 'foobar'
    self.stack = utils.parse_stack(template)
    self.stack.create()
    resource = self.stack['my_webhook']
    self.assertIsNone(resource.FnGetAtt('capabilityUrl'))
