// My second attempt, once I remembered the plus '+ 1' part to work out percentages
// function depositProfit(deposit, rate, threshold) {
//     let years = 0;

//     for (let i = 1; deposit < threshold; i++) {
//         deposit = deposit * (rate / 100 + 1);
//         years = i;
//     }
//     return years;
// }

function depositProfit(deposit, rate, threshold) {
    // Change to percentage
    if (rate < 10)  {
        rate = "1.0" + rate
    } else {
        rate = "1." + rate
    }
    // Change to float
    rate = parseFloat(rate);
    // Add interest to deposit
    let compoundIterest = deposit * rate
    let years  = 1;
    if (compoundIterest < threshold) {
        for (let i = 2; compoundIterest <= threshold; i++) {
            compoundIterest = compoundIterest * rate
            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);
    });
});