Java 如何实现自定义秒表？

Junit是否有一些特殊的注释可以自动计算花费的时间？如果是这样，我可以避免手动计算时间，如下所示：

long start = System.currentTimeMillis();
// do something here
long end = System.currentTimeMillis();
log.info("took time: {}", end - start);
assertTrue((end - start) > 1000L);

现在我觉得秒表有点笨重：

@Rule
public Stopwatch stopwatch = new Stopwatch() {
    @Override
    protected void succeeded(long nanos, Description description) {
        logInfo(description, "succeeded", nanos);
    }

    @Override
    protected void failed(long nanos, Throwable e, Description description) {
        logInfo(description, "failed", nanos);
    }

    @Override
    protected void skipped(long nanos, AssumptionViolatedException e, Description description) {
        logInfo(description, "skipped", nanos);
    }

    @Override
    protected void finished(long nanos, Description description) {
        logInfo(description, "finished", nanos);
    }
};

@Rule
public Stopwatch stopwatch = new Stopwatch() {};

@Test
public void test_sleep_1_seconds()  {
    sleep1();
    assertTrue(stopwatch.runtime(TimeUnit.SECONDS) > 1);
}

理想情况下，我想要这种效果：

@Test
@StopWatch
public void test_sleep_1_seconds(){
    sleep1();
    assertTrue(stopwatch.runtime(TimeUnit.SECONDS) > 1L);
}

如何实现自定义的秒表？

是抽象的，但它没有任何抽象方法，因此不需要覆盖所有方法，但仍然需要实例化一个匿名类，这稍微不那么麻烦：

@Rule
public Stopwatch stopwatch = new Stopwatch() {
    @Override
    protected void succeeded(long nanos, Description description) {
        logInfo(description, "succeeded", nanos);
    }

    @Override
    protected void failed(long nanos, Throwable e, Description description) {
        logInfo(description, "failed", nanos);
    }

    @Override
    protected void skipped(long nanos, AssumptionViolatedException e, Description description) {
        logInfo(description, "skipped", nanos);
    }

    @Override
    protected void finished(long nanos, Description description) {
        logInfo(description, "finished", nanos);
    }
};

@Rule
public Stopwatch stopwatch = new Stopwatch() {};

@Test
public void test_sleep_1_seconds()  {
    sleep1();
    assertTrue(stopwatch.runtime(TimeUnit.SECONDS) > 1);
}

实际上，根据，

StopWatch

不需要是抽象的，它被更改为一个常规类。这些更新将在JUnit4.13中发布

如果您需要为所有测试检查此项，您可能希望覆盖

成功

：

@Rule
public Stopwatch stopwatch = new Stopwatch() {
    @Override
    protected void succeeded(long nanos, Description description) {
        assertTrue(runtime(TimeUnit.SECONDS) > 1);
    }
};

---

谢谢但是，如果我想实现一个定制的秒表注释——MyStopWatch，并直接在上面的测试方法上按需使用它，就像之前的

@test

一样，junit能否通过实现一些类来支持它？@朱国伟，这是可能的。我想您需要为此实现自定义