@Test
public void testSpeed() throws InterruptedException {
StopWatchFactory swf = StopWatchFactory.getDefault();
long time = System.currentTimeMillis();
int iterations = 1200000;
StopWatch total = swf.getStopWatch();
for (int i = 0; i < iterations; i++) {
StopWatch sw = swf.getStopWatch("foo");
// Do nothing
sw.stop("iteration:success");
}
total.stop("total");
time = System.currentTimeMillis() - time;
// Output perf data
System.out.println(
"Iterations: "
+ iterations
+ ", total time "
+ time
+ " ms, is "
+ (iterations * 1000 / time)
+ " iterations per second");
assertTrue(
"StopWatch and system count differ by more than 1 ms",
Math.abs(time - total.getTimeNanos() / 1e6) < 1);
}
@Test
public void testToStringIterations() throws InterruptedException {
StopWatchFactory swf = StopWatchFactory.getDefault();
int iterations = 100;
StopWatch sw = swf.getStopWatch("foo");
for (int i = 0; i < iterations; i++) {
Thread.sleep(10 + (long) (Math.random() * 10));
}
sw.stop("ok");
assertEquals("ok", sw.getTag());
assertTrue(sw.getTimeNanos() > iterations * 10 * 1000000); // No way this could be faster
String s = sw.toString(iterations);
assertTrue(s.contains("iterations/second"));
}