def test_filter_unmanaged_stacks(self):
        stacks = ['a', 'b', 'c']
        managed_stacks = ['a', 'c']

        self.assertListEqual(
            managed_stacks,
            DependencyResolver.filter_unmanaged_stacks(managed_stacks, stacks))
    def test_filter_unmanaged_stacks(self):
        stacks = ['a', 'b', 'c']
        managed_stacks = ['a', 'c']

        self.assertListEqual(managed_stacks, DependencyResolver.filter_unmanaged_stacks(managed_stacks, stacks))
    def test_filter_unmanaged_stacks(self):
        stacks = ["a", "b", "c"]
        managed_stacks = ["a", "c"]

        self.assertListEqual(managed_stacks, DependencyResolver.filter_unmanaged_stacks(managed_stacks, stacks))