function validTime(str) {
    let splitarray = str.split(":");
    let hours = parseInt(splitarray[0]);
    let minutes = parseInt(splitarray[1]);
    let hours2 = Number(splitarray[0]);
    let minutes2 = Number(splitarray[1]);
    
    if(minutes <= 60 && minutes >= 0 && hours <= 23 && hours >= 0) 
        if(minutes2 <= 60 && minutes2 >= 0 && hours2 <= 23 && hours2 >= 0)  return true;
    return false;
}




/**
* 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);
    });
});