public void when_creating_xpath_attribute_with_null_attribute_name(string attributeValue, string expectedResult)
        {
            var result = _builder.GetAttributePart(null, attributeValue);

            result.ShouldBe(expectedResult);

            _cssValidatorMock.DidNotReceiveWithAnyArgs().ValidateClassName(Arg.Any <string>());

            _xPathValidatorMock.DidNotReceiveWithAnyArgs().IsReservedFunctionName(Arg.Any <string>());
            _xPathValidatorMock.DidNotReceiveWithAnyArgs().ValidateQName(Arg.Any <string>(), Arg.Any <string>());
            _xPathValidatorMock.DidNotReceiveWithAnyArgs().ValidateNCName(Arg.Any <string>(), Arg.Any <string>());
        }