Randori Egg Cooker @ Key Consulting 15/12/2011

EggCooker.java

import java.util.Timer;
import java.util.TimerTask;

public class EggCooker {

	private View view;
	private long remainingTime;
	private ITimer timer;

	public EggCooker(View view, ITimer timer) {
		this.view = view;
		this.timer = timer;
	}

	public void cook() {
		remainingTime = 180000;
		view.setRemainingTime(remainingTime);
		timer.schedule(new TimerTask() {
			public void run() {
				remainingTime -= 1000;
				view.setRemainingTime(remainingTime);
				if (remainingTime == 0) {
					view.displayPopup();
				}
			}
		}, 1000, 1000);
	}

}

EggCookerTest.java

import static org.junit.Assert.*;

import java.util.Timer;

import org.junit.Test;

public class EggCookerTest extends Thread {
	private TimerMock timer = new TimerMock();
	private ViewMock view = new ViewMock();
	private EggCooker eggCooker = new EggCooker(view, timer);

	@Test
	public void acceptance_test() {
		eggCooker.cook();
		for (int i = 0; i < 180; i++) {
			assertFalse(view.popupHasBeenDisplayed);
			this.timer.oneSecondHasPassed();
		}
		assertTrue(view.popupHasBeenDisplayed);
	}

	@Test
	public void remaining_time_should_be_initialized_at_3_minutes() {
		eggCooker.cook();
		assertEquals(180000, view.setRemainingTimeCalledWith);
	}

	@Test
	public void popup_should_not_be_displayed_immediatly_after_cook() {
		eggCooker.cook();
		assertFalse(view.popupHasBeenDisplayed);
	}

	@Test
	public void remaining_time_should_decrement_every_second()
			throws InterruptedException {
		eggCooker.cook();
		this.timer.oneSecondHasPassed();
		assertEquals(179000, view.setRemainingTimeCalledWith);
	}
}

ITimer.java

import java.util.TimerTask;

public interface ITimer {
	public void schedule(TimerTask timerTask, long dt, long pt);
}

TimerMock.java

import java.util.TimerTask;

public class TimerMock implements ITimer {

	private TimerTask timerTask;

	@Override
	public void schedule(TimerTask timerTask, long dt, long pt) {
		this.timerTask = timerTask;

	}

	public void oneSecondHasPassed() {
		timerTask.run();
	}
}

View.java

public interface View {

	public abstract void setRemainingTime(long time);

	public abstract void displayPopup();

}

ViewMock.java

public class ViewMock implements View {

	public long setRemainingTimeCalledWith;
	public boolean popupHasBeenDisplayed = false;

	/*
	 * (non-Javadoc)
	 * 
	 * @see View#setRemainingTime(long)
	 */
	@Override
	public void setRemainingTime(long time) {
		this.setRemainingTimeCalledWith = time;
	}

	@Override
	public void displayPopup() {
		this.popupHasBeenDisplayed = true;
	}

}