bool stopped_;
};

TEST(CoordinatorTest, TestRealStop) {
  std::atomic<int> counter(0);
  Coordinator coord;

  std::unique_ptr<MockQueueRunner> qr1(new MockQueueRunner(&coord));
  qr1->StartCounting(&counter, 100);
  TF_ASSERT_OK(coord.RegisterRunner(std::move(qr1)));

  std::unique_ptr<MockQueueRunner> qr2(new MockQueueRunner(&coord));
  qr2->StartCounting(&counter, 100);