def test_calls__evaluate_env_var(self, mock__evaluate_env_var):
     StringEvaluator.evaluate("boo", {})
     mock__evaluate_env_var.assert_called_once_with("boo")
 def test_calls_code_evaluate(self, mock_code_evaluate):
     StringEvaluator.evaluate("boo", {})
     mock_code_evaluate.assert_called_once_with("boo", {})