import static org.junit.Assert.*;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
 * The test class ClockDisplayTest.
 *
 * @author  Brad Richards
 * @version 1.0
 */
public class ClockDisplayTest
{
    /**
     * Default constructor for test class ClockDisplayTest
     */
    public ClockDisplayTest()
    {
    }

    /**
     * Sets up the test fixture.
     *
     * Called before every test case method.
     */
    @Before
    public void setUp()
    {
    }

    /**
     * Tears down the test fixture.
     *
     * Called after every test case method.
     */
    @After
    public void tearDown()
    {
    }

    @Test
    public void constructor_InitialTime()
    {
        ClockDisplay cd = new ClockDisplay();
        assertEquals("00:00", cd.getTime());
    }

    @Test
    public void setTime_SingleDigits()
    {
        ClockDisplay cd = new ClockDisplay();
        cd.setTime(2, 9);
        assertEquals("02:09", cd.getTime());
    }

    @Test
    public void setTime_DoubleDigits()
    {
        ClockDisplay cd = new ClockDisplay();
        cd.setTime(15, 51);
        assertEquals("15:51", cd.getTime());
    }

    @Test
    public void constructor_SpecifiedTimes()
    {
        ClockDisplay cd = new ClockDisplay(3,17);
        assertEquals("03:17", cd.getTime());
    }

    @Test
    public void timeTick_minutesOnly()
    {
        ClockDisplay cd = new ClockDisplay();
        assertEquals("00:00", cd.getTime());
        cd.timeTick();
        assertEquals("00:01", cd.getTime());
        cd.timeTick();
        assertEquals("00:02", cd.getTime());
    }

    @Test
    public void timeTick_minutesAndHours()
    {
        ClockDisplay cd = new ClockDisplay(3, 59);
        assertEquals("03:59", cd.getTime());
        cd.timeTick();
        assertEquals("04:00", cd.getTime());
        cd.timeTick();
        assertEquals("04:01", cd.getTime());
    }

    @Test
    public void timeTick_bothRollOver()
    {
        ClockDisplay cd = new ClockDisplay(23, 59);
        assertEquals("23:59", cd.getTime());
        cd.timeTick();
        assertEquals("00:00", cd.getTime());
        cd.timeTick();
        assertEquals("00:01", cd.getTime());
    }
}