def test_can_return_model_as_best_assembly(self, mock_best):
mock_best.return_value = None
f = File()
f._models = "ABCDEF"
model = f.generate_best_assembly()
self.assertEqual(model, "A")
def test_can_generate_best_assembly(self, mock_best, mock_model):
f = File()
mock_best.return_value = {"delta_energy": -60, "id": 2}
model = f.generate_best_assembly()
self.assertIs(model, mock_model.return_value)
mock_model.assert_called_with(2)