List<Future<String>> futures = testExecutor.invokeAll(tasks, timeout, unit);
      mock.assertMethodWithTimeout("invokeAll", timeout, unit);
      checkResults(futures);
    }
  }

  public void testInvokeAny() throws InterruptedException, ExecutionException, TimeoutException {
    List<Callable<String>> tasks = createTasks(3);
    {
      MockExecutor mock = new MockExecutor();