ClockAddTest.java

import org.junit.Ignore;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class ClockAddTest {

    @Ignore("Remove to run test")
    @Test
    public void addMinutes() {
        Clock clock = new Clock(10, 0);
        clock.add(3);
        assertEquals("10:03", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void addNoMinutes() {
        Clock clock = new Clock(6, 41);
        clock.add(0);
        assertEquals("06:41", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void addToNextHour() {
        Clock clock = new Clock(0, 45);
        clock.add(40);
        assertEquals("01:25", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void addMoreThanOneHour() {
        Clock clock = new Clock(10, 0);
        clock.add(61);
        assertEquals("11:01", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void addMoreThanTwoHoursWithCarry() {
        Clock clock = new Clock(0, 45);
        clock.add(160);
        assertEquals("03:25", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void addAcrossMidnight() {
        Clock clock = new Clock(23, 59);
        clock.add(2);
        assertEquals("00:01", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void addMoreThanOneDay() {
        Clock clock = new Clock(5, 32);
        clock.add(1500);
        assertEquals("06:32", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void addMoreThanTwoDays() {
        Clock clock = new Clock(1, 1);
        clock.add(3500);
        assertEquals("11:21", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractMinutes() {
        Clock clock = new Clock(10, 3);
        clock.add(-3);
        assertEquals("10:00", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractToPreviousHour() {
        Clock clock = new Clock(10, 3);
        clock.add(-30);
        assertEquals("09:33", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractMoreThanAnHour() {
        Clock clock = new Clock(10, 3);
        clock.add(-70);
        assertEquals("08:53", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractAcrossMidnight() {
        Clock clock = new Clock(0, 3);
        clock.add(-4);
        assertEquals("23:59", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractMoreThanTwoHours() {
        Clock clock = new Clock(0, 0);
        clock.add(-160);
        assertEquals("21:20", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractMoreThanTwoHoursWithBorrow() {
        Clock clock = new Clock(6, 15);
        clock.add(-160);
        assertEquals("03:35", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractMoreThanOneDay() {
        Clock clock = new Clock(5, 32);
        clock.add(-1500);
        assertEquals("04:32", clock.toString());
    }

    @Ignore("Remove to run test")
    @Test
    public void subtractMoreThanTwoDays() {
        Clock clock = new Clock(2, 20);
        clock.add(-3000);
        assertEquals("00:20", clock.toString());
    }
}