How to use the scanapi.evaluators.StringEvaluator function in scanapi

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", {}, False)

def test_should_replace(self, sequence, variable, variable_value, expected):
            assert (
                StringEvaluator.replace_var_with_value(
                    sequence, variable, variable_value
                )
                == expected
            )

def test_should_return_sequence(self, sequence):
                assert StringEvaluator._evaluate_custom_var(sequence, {}) == sequence

def test_should_return_evaluated_var(self, sequence, expected):
                    assert StringEvaluator._evaluate_env_var(sequence) == expected