}

  public void testExecute() {
    MockExecutor mock = new MockExecutor();
    TestExecutor testExecutor = new TestExecutor(mock);
    testExecutor.execute(doNothing());
    mock.assertLastMethodCalled("execute");
  }

  public void testSubmit() throws InterruptedException, ExecutionException {
    {
      MockExecutor mock = new MockExecutor();
      TestExecutor testExecutor = new TestExecutor(mock);

  private static final Runnable DO_NOTHING =
      new Runnable() {
        @Override
        public void run() {}
      };

  public void testSchedule() {
    MockExecutor mock = new MockExecutor();
    TestExecutor testExecutor = new TestExecutor(mock);

    Future<?> unused1 = testExecutor.schedule(DO_NOTHING, 10, MINUTES);
    mock.assertLastMethodCalled("scheduleRunnable", 10, MINUTES);