def test_combine(self):
    self.assertEqual([{'a': 1, 'b': 2}, {'a': 1, 'b': 3}, {'a': 2, 'b': 2}, {'a': 2, 'b': 3}], test_combinations.combine(a=[1, 2], b=[2, 3]))
def test_combine(self):
    self.assertEqual([{'a': 1, 'b': 2}, {'a': 1, 'b': 3}, {'a': 2, 'b': 2}, {'a': 2, 'b': 3}], test_combinations.combine(a=[1, 2], b=[2, 3]))