function depositProfit(deposit, rate, threshold) {
    for ( i=0; i >= 0; i++ ) {
        if (deposit >= threshold) {
            return i
        } else {
            deposit = deposit * (rate/100 + 1)
        }
    }
}



/**
* Test Suite 
*/
describe('depositProfit()', () => {
    it('returns number of years it will take to hit threshold based off of deposit & rate', () => {
        // arrange
        const deposit = 30;
        const rate = 7;
        const threshold = 120;
        
        // act
        const result = depositProfit(deposit, rate, threshold)

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(21);
    });
});