ClockUtilTest.java

package org.springside.modules.utils.time;

import static org.assertj.core.api.Assertions.*;

import java.util.Date;

import org.junit.Test;
import org.springside.modules.utils.time.ClockUtil.DummyClock;

public class ClockUtilTest {

	@Test
	public void testDummyClock() {
		DummyClock clock = new DummyClock();
		clock.updateNow(111);
		assertThat(clock.currentTimeMillis()).isEqualTo(111);
		assertThat(clock.currentDate().getTime()).isEqualTo(111);

		clock.updateNow(new Date(112));
		assertThat(clock.currentTimeMillis()).isEqualTo(112);
		clock.increaseTime(200);
		assertThat(clock.currentTimeMillis()).isEqualTo(312);
		clock.decreaseTime(100);
		assertThat(clock.currentTimeMillis()).isEqualTo(212);

		clock.setNanoTime(150);
		assertThat(clock.nanoTime()).isEqualTo(150);

	}

	@Test
	public void elapsedTime() {
		try {
			DummyClock clock = ClockUtil.useDummyClock(2000);
			clock.increaseTime(1000);
			assertThat(ClockUtil.elapsedTime(2000)).isEqualTo(1000);
		} finally {
			ClockUtil.useDefaultClock();
		}
	}

}