def test_compute_diff_nested(self):
        """Alert Class - Compute Diff - Difference in Nested Dictionary"""
        # This is the example given in the docstring
        common = {'abc': 123, 'nested': {'A': 1}}
        record = {'abc': 123, 'nested': {'A': 1, 'B': 2}}
        assert_equal({'nested': {'B': 2}}, Alert._compute_diff(common, record))