function depositProfit(deposit, rate, threshold) {
    let accountBalance = deposit;
    
    let years = 0;
    while (accountBalance < threshold) {
        accountBalance = (1 + rate / 100) * accountBalance;
        years++;
    }
    
    return years;
}



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