TestExecutor testExecutor = new TestExecutor(mock);
      List<Future<String>> futures = testExecutor.invokeAll(tasks);
      mock.assertLastMethodCalled("invokeAll");
      checkResults(futures);
    }
    {
      MockExecutor mock = new MockExecutor();
      TimeUnit unit = SECONDS;
      long timeout = 5;
      TestExecutor testExecutor = new TestExecutor(mock);

    checkResult(skipNulls, iterable1, "1");
    checkResult(skipNulls, iterable12, "1-2");
    checkResult(skipNulls, iterable123, "1-2-3");
    checkResult(J, UNDERREPORTING_SIZE_LIST, "1-2-3");
    checkResult(J, OVERREPORTING_SIZE_LIST, "1-2-3");
    checkResult(skipNulls, iterableNull1, "1");
    checkResult(skipNulls, iterable1Null, "1");
    checkResult(skipNulls, iterable1Null2, "1-2");
  }