For the given class below, I was asked to test this class with a new `TimeTest` class that has a method `doTest()` to try out these methods in my `Time` class. I have tested classes before via the `main` method, but I have no idea how to test a class using a class. Could anyone help me get started?

```
public class Time {

    private int minute;
    private int hour;
    private int totalMinute;

    public Time() {
        minute = 0;
        hour = 0;
    }

    public Time(int hours, int minutes) {
        setHour(hours);
        setMinute(minutes);
    }

    private void setHour(int hours) {
        if (hours < 24 && hours >= 0) {
            hour = hours;
        } else {
            hour = 0;
        }
    }

    private void setMinute(int minutes) {
        if (minutes < 60 && minutes >= 0) {
            minute = minutes;
        } else {
            minute = 0;
        }
    }

    public void setTime(int hours, int minutes) {
        setHour(hours);
        setMinute(minutes);
    }

    public int getElapsedTime(Time that) {
        int thisTime = this.getTotalMinutes();
        int thatTime = that.getTotalMinutes();
        if (thisTime > thatTime) {
            return thisTime - thatTime;
        }
        return thatTime - thisTime;
    }

    private int getTotalMinutes() {
        totalMinute = (hour * 60) + minute;

        return totalMinute;
    }

    public String getAsString() {
        if (hour < 10 && minute < 10) {
            return "0" + hour + ":0" + minute;
        } else if (hour < 10 && minute >= 10) {
            return "0" + hour + ":" + minute;
        } else if (hour >= 10 && minute < 10) {
            return hour + ":0" + minute;
        } else {
            return hour + ":" + minute;
        }
    }
}

```