Weird problem using JUnit in multi-thread environment

Question

I meet a weired problem when using JUnit in multi-thread environment. The following code should fail, but it actually pass in eclipse.

public class ExampleT         


        

Answer 1

@zjffdu As @ShiDoiSi pointed out, Thread.join() works fine if you have a single worker thread that you want to assert or fail from.

If you have multiple worker threads, or if you want a little more convenience, there is a JUnit extension for performing multi-threaded assertions: ConcurrentUnit:

public class ExampleTest extends ConcurrentTestCase {
    private ExecutorService executor = Executors.newFixedThreadPool(10);

    public void test() throws Throwable {
        executor.submit(new Runnable() {
            @Override
            public void run() {
                try {
                    threadFail("Failure message");
                } finally {
                    resume();
                }
            }
        });

        threadWait();
    }
}

Good luck