function reverseAString(str) {
    //  write code here.
    let rev = []
    let n = str.length
    let s = str.split("")
    console.log(s)
    for(let i = 0; i < n; i++){
        rev[n-i] = s[i]
    }
    return rev.join("")
}



/**
* Test Suite 
*/
describe('reverseAString()', () => {
    it('returns original string reversed', () => {
        // arrange
        const str = 'hello';
        
        // act
        const result = reverseAString(str);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe('olleh');
    });
});