function validTime(str) {
    //  write code here.
    let splitString = str.split("")
    let hours = splitString[0] + splitString[1];
    let minutes = splitString[3] + splitString[4];
    hours = parseInt(hours, 10);
    minutes = parseInt(minutes, 10);
    if (minutes < 59 && hours < 23) {
        return true;
    } else {
        return false;
    }  
}

// i dont know the split function well. in the result vid the values can split on a specific value... ie. :. That would make it easy to add seconds.


/**
* Test Suite 
*/
describe('validTime()', () => {
    it('returns true for valid time', () => {
        // arrange
        const str = '13:58';
        
        // act
        const result = validTime(str);

        // log
        console.log("result 1: ", result);
        
        // assert
        expect(result).toBe(true);
    });

    it('returns false when invalid hours', () => {
        // arrange
        const str = '25:51';
        
        // act
        const result = validTime(str);

        // log
        console.log("result 1: ", result);
        
        // assert
        expect(result).toBe(false);
    });

    it('returns false when invalid minutes', () => {
        // arrange
        const str = '02:76';
        
        // act
        const result = validTime(str);

        // log
        console.log("result 1: ", result);
        
        // assert
        expect(result).toBe(false);
    });
});