def test_get_stack_order_accepts_stacks_without_parameters_key(self):
stacks = {'default-sg': {},
'app1': None,
'app2': {},
'vpc': {},
}
result = 4
self.assertEqual(result, len(DependencyResolver.get_stack_order(stacks)))
def test_get_stack_order_includes_independent_stacks(self):
stacks = {'default-sg': StackConfig({'template-url': 'horst.yml'}),
'app1': StackConfig(
{'template-url': 'horst.yml', 'parameters': {'a': '|Ref|vpc.id', 'b': '|Ref|default-sg.id'}}),
'app2': StackConfig({'template-url': 'horst.yml',
'parameters': {'a': '|Ref|vpc.id', 'b': '|Ref|default-sg.id',
'c': 'Ref::app1.id'}}),
'vpc': StackConfig({'template-url': 'horst.yml',
'parameters': {'logBucketName': 'is24-cloudtrail-logs',
'includeGlobalServices': False}})
}
result = 4
self.assertEqual(result, len(DependencyResolver.get_stack_order(stacks)))
def test_get_stack_order_returns_a_valid_order(self):
stacks = {'default-sg': StackConfig({'template-url': 'horst.yml', 'parameters': {'a': 'Ref::vpc.id'}}),
'app1': StackConfig(
{'template-url': 'horst.yml', 'parameters': {'a': '|Ref|vpc.id', 'b': '|Ref|default-sg.id'}}),
'app2': StackConfig({'template-url': 'horst.yml',
'parameters': {'a': '|Ref|vpc.id', 'b': '|Ref|default-sg.id',
'c': '|Ref|app1.id'}}),
'vpc': StackConfig({'template-url': 'horst.yml',
'parameters': {'logBucketName': 'is24-cloudtrail-logs',
'includeGlobalServices': False}})
}
expected = ['vpc', 'default-sg', 'app1', 'app2']
self.assertEqual(expected, DependencyResolver.get_stack_order(stacks))
def test_get_stack_order_raises_exception_on_cyclic_dependency(self):
stacks = {'app1': {'parameters': {'a': 'Ref::app2.id'}},
'app2': {'parameters': {'a': 'Ref::app1.id'}}
}
with self.assertRaises(Exception):
DependencyResolver.get_stack_order(stacks)
