我在多线程环境下使用JUnit时遇到了一个奇怪的问题。下面的代码应该会失败，但实际上它在Eclipse中通过了。

public class ExampleTest extends TestCase {

    private ExecutorService executor = Executors.newFixedThreadPool(10);

    private volatile boolean isDone = false;

    public void test() throws InterruptedException, ExecutionException {
        executor.submit(new Runnable() {

            @Override
            public void run() {
                try {
                    fail();
                } finally {
                    isDone = true;
                }
            }
        });

        while (!isDone) {
            Thread.sleep(1000);
        }
    }
}

这是另一段代码，这里我使用Future.get（）来等待线程停止，在这种情况下，它将失败。

public class ExampleTest extends TestCase {

    private ExecutorService executor = Executors.newFixedThreadPool(10);

    private volatile boolean isDone = false;

    public void test() throws InterruptedException, ExecutionException {
        Future future=executor.submit(new Runnable() {

            @Override
            public void run() {
                try {
                    fail();
                } finally {
                    isDone = true;
                }
            }
        });

        future.get();
    }
}

我在谷歌上搜索了一下，发现JUnit不能处理多线程单元测试，但是这两段代码有什么区别呢？谢谢