content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.time;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  
  import alluxio.Constants;
  
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  import java.time.Duration;
  import java.util.concurrent.atomic.AtomicInteger;
  
  /**
   * Unit tests for {@link ManualSleeper}.
   */
  public final class ManualSleeperTest {
    private AtomicInteger mSleepTime;
    private ManualSleeper mSleeper;
    private Thread mTestThread;
  
    @Before
    public void before() {
      mSleepTime = new AtomicInteger(0);
      mSleeper = new ManualSleeper();
      mTestThread = new Thread(() -> {
        while (true) {
          try {
            mSleeper.sleep(Duration.ofMillis(mSleepTime.incrementAndGet()));
          } catch (InterruptedException e) {
            return;
          }
        }
      });
      mTestThread.setDaemon(true);
      mTestThread.start();
    }
  
    @After
    public void after() throws InterruptedException {
      mTestThread.interrupt();
      mTestThread.join(Constants.SECOND_MS);
    }
  
    @Test
    public void checkSleepTime() throws InterruptedException {
      for (int i = 1; i < 100; i++) {
        assertEquals(i, mSleeper.waitForSleep().toMillis());
        mSleeper.wakeUp();
      }
    }
  
    @Test
    public void propagateInterrupt() throws InterruptedException {
      mTestThread.interrupt();
      mTestThread.join(Constants.SECOND_MS);
      assertFalse(mTestThread.isAlive());
    }
  }
  