@NullUnmarked
public class WrappingScheduledExecutorServiceTest extends TestCase {
  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);