function depositProfit(deposit, rate, threshold) {
    // use a while loop that exits when we exceed the threshold account balance
    // Increment the year starting at 0 (initial deposit) and return when we exceed threshold
    let endYearBalance = deposit
    let currentYear = 0
    while (endYearBalance < threshold) {
        currentYear += 1
        endYearBalance *= (rate + 100)/ 100
    }
    return currentYear
    
}



/**
* Test Suite 
*/
describe('depositProfit()', () => {
    it('returns number of years it will take to hit threshold based off of deposit & rate', () => {
        // arrange
        const deposit = 100;
        const rate = 20;
        const threshold = 170;
        
        // act
        const result = depositProfit(deposit, rate, threshold)

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(3);
    });
});