def METHOD_NAME(self, _parameter_values, expected):
    """Test parameter_values standardization."""
    for parameter_values in [_parameter_values, array(_parameter_values)]:  # Numpy
        self.assertEqual(BasePrimitive._validate_parameter_values(parameter_values), expected)
        self.assertEqual(
            BasePrimitive._validate_parameter_values(None, default=parameter_values), expected
        )