@Test
	public void testSleep() {
		StopWatch watch = new StopWatch();
		watch.start();
		ThreadUtils.sleep(1000);
		watch.stop();
		assertThat(watch.getTime()).isGreaterThanOrEqualTo(1000);
		assertThat(watch.getTime()).isLessThan(3000);
	}
Test method for {@link ThreadUtils#sleep(long)}.
ngrinder-core/src/test/java/org/ngrinder/common/util/ThreadUtilsTest.java