var personCustomValidators = {
        toBeOlderThan: function(){
            return {
                compare: function(actualAge, expectAge) {
                    var result = {pass:false,message:''};
                    if (actualAge > expectAge){
                        result.pass = true;
                        result.message = "test is passed"
                    } else {
                        result.pass = false;
                        result.message = "test fails"
                    }
                    return result;
                }
            }
        },
        toBeFirstNameEqualTo: function() {
            return {
                compare: function(actual, expected) {
                    var result = {pass:false,message:''};
                    var firstName = actual.split(' ')[0];
                    if (firstName == expected){
                        result.pass = true;
                        result.message = "test is passed"
                    } else {
                        result.pass = false;
                        result.message = "test fails"
                    }
                    return result;
                }
            }
        },
        toBeLastNameEqualTo: function() {
            return {
                compare: function(actual, expected) {
                    var result = {pass:false,message:''};
                    var firstName = actual.split(' ')[1];
                    if (firstName == expected){
                        result.pass = true;
                        result.message = "test is passed"
                    } else {
                        result.pass = false;
                        result.message = "test fails"
                    }
                    return result;
                }
            }
        }
}