pytest_parameterize.py

    # Unittest style, written for easy port
    def test_boolean_validator(self):

        variations = (
            ('False', 'err'),
            ('True', 'err'),
            (0, 'err'),
            (1, 'err'),
            (True, True),
            (False, False),
            ({}, 'err'),
            ((,), 'err')
        )
        for (claim_value, expected) in variations:
            if expected == "err":
                with self.expectRaises(TypeError):
                    boolean_parser(claim_value)
            else:
                self.assertEqual(boolean_parser(claim_value), expected)


    # Pytest style
    @pytest.mark.parameterize(('claim_value,expected'), (
            ('False', 'err'),
            ('True', 'err'),
            (0, 'err'),
            (1, 'err'),
            (True, True),
            (False, False),
            ({}, 'err'),
            ((,), 'err')
        ))
    def test_boolean_validator(claim_value, expected):
        if expected == "err":
                with pytest.raises(TypeError):
                    boolean_parser(claim_value)
            else:
                assert boolean_parser(claim_value) == expected