Remove FakeClock.sleep.

This functionality isn't used and there is no point in supporting
it.

PiperOrigin-RevId: 353876038

library/common/src/main/java/com/google/android/exoplayer2/util/Clock.java

@@ -43,9 +43,6 @@ public interface Clock {
   /** @see android.os.SystemClock#uptimeMillis() */
   long uptimeMillis();
 
-  /** @see android.os.SystemClock#sleep(long) */
-  void sleep(long sleepTimeMs);
-
   /**
    * Creates a {@link HandlerWrapper} using a specified looper and a specified callback for handling
    * messages.

library/common/src/main/java/com/google/android/exoplayer2/util/SystemClock.java

@@ -43,11 +43,6 @@ public class SystemClock implements Clock {
     return android.os.SystemClock.uptimeMillis();
   }
 
-  @Override
-  public void sleep(long sleepTimeMs) {
-    android.os.SystemClock.sleep(sleepTimeMs);
-  }
-
   @Override
   public HandlerWrapper createHandler(Looper looper, @Nullable Callback callback) {
     return new SystemHandlerWrapper(new Handler(looper, callback));

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeClock.java

@@ -38,7 +38,6 @@ import java.util.List;
  */
 public class FakeClock implements Clock {
 
-  private final List<Long> wakeUpTimes;
   private final List<HandlerMessageData> handlerMessages;
   private final long bootTimeMs;
 
@@ -65,7 +64,6 @@ public class FakeClock implements Clock {
   public FakeClock(long bootTimeMs, long initialTimeMs) {
     this.bootTimeMs = bootTimeMs;
     this.timeSinceBootMs = initialTimeMs;
-    this.wakeUpTimes = new ArrayList<>();
     this.handlerMessages = new ArrayList<>();
     SystemClock.setCurrentTimeMillis(initialTimeMs);
   }
@@ -78,12 +76,6 @@ public class FakeClock implements Clock {
   public synchronized void advanceTime(long timeDiffMs) {
     timeSinceBootMs += timeDiffMs;
     SystemClock.setCurrentTimeMillis(timeSinceBootMs);
-    for (Long wakeUpTime : wakeUpTimes) {
-      if (wakeUpTime <= timeSinceBootMs) {
-        notifyAll();
-        break;
-      }
-    }
     for (int i = handlerMessages.size() - 1; i >= 0; i--) {
       if (handlerMessages.get(i).maybeSendToTarget(timeSinceBootMs)) {
         handlerMessages.remove(i);
@@ -106,23 +98,6 @@ public class FakeClock implements Clock {
     return elapsedRealtime();
   }
 
-  @Override
-  public synchronized void sleep(long sleepTimeMs) {
-    if (sleepTimeMs <= 0) {
-      return;
-    }
-    Long wakeUpTimeMs = timeSinceBootMs + sleepTimeMs;
-    wakeUpTimes.add(wakeUpTimeMs);
-    while (timeSinceBootMs < wakeUpTimeMs) {
-      try {
-        wait();
-      } catch (InterruptedException e) {
-        // Ignore InterruptedException as SystemClock.sleep does too.
-      }
-    }
-    wakeUpTimes.remove(wakeUpTimeMs);
-  }
-
   @Override
   public HandlerWrapper createHandler(Looper looper, @Nullable Callback callback) {
     return new ClockHandler(looper, callback);

testutils/src/test/java/com/google/android/exoplayer2/testutil/FakeClockTest.java

@@ -16,14 +16,11 @@
 package com.google.android.exoplayer2.testutil;
 
 import static com.google.common.truth.Truth.assertThat;
-import static java.util.concurrent.TimeUnit.MILLISECONDS;
 
 import android.os.ConditionVariable;
 import android.os.HandlerThread;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
-import com.google.android.exoplayer2.util.Clock;
 import com.google.android.exoplayer2.util.HandlerWrapper;
-import java.util.concurrent.CountDownLatch;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -31,8 +28,6 @@ import org.junit.runner.RunWith;
 @RunWith(AndroidJUnit4.class)
 public final class FakeClockTest {
 
-  private static final long TIMEOUT_MS = 10_000;
-
   @Test
   public void currentTimeMillis_withoutBootTime() {
     FakeClock fakeClock = new FakeClock(/* initialTimeMs= */ 10);
@@ -62,48 +57,6 @@ public final class FakeClockTest {
     assertThat(fakeClock.elapsedRealtime()).isEqualTo(2500);
   }
 
-  @Test
-  public void testSleep() throws InterruptedException {
-    FakeClock fakeClock = new FakeClock(0);
-    SleeperThread sleeperThread = new SleeperThread(fakeClock, 1000);
-    sleeperThread.start();
-    assertThat(sleeperThread.waitUntilAsleep(TIMEOUT_MS)).isTrue();
-    assertThat(sleeperThread.isSleeping()).isTrue();
-    fakeClock.advanceTime(1000);
-    sleeperThread.join(TIMEOUT_MS);
-    assertThat(sleeperThread.isSleeping()).isFalse();
-
-    sleeperThread = new SleeperThread(fakeClock, 0);
-    sleeperThread.start();
-    sleeperThread.join();
-    assertThat(sleeperThread.isSleeping()).isFalse();
-
-    SleeperThread[] sleeperThreads = new SleeperThread[5];
-    sleeperThreads[0] = new SleeperThread(fakeClock, 1000);
-    sleeperThreads[1] = new SleeperThread(fakeClock, 1000);
-    sleeperThreads[2] = new SleeperThread(fakeClock, 2000);
-    sleeperThreads[3] = new SleeperThread(fakeClock, 3000);
-    sleeperThreads[4] = new SleeperThread(fakeClock, 4000);
-    for (SleeperThread thread : sleeperThreads) {
-      thread.start();
-      assertThat(thread.waitUntilAsleep(TIMEOUT_MS)).isTrue();
-    }
-    assertSleepingStates(new boolean[] {true, true, true, true, true}, sleeperThreads);
-    fakeClock.advanceTime(1500);
-    assertThat(sleeperThreads[0].waitUntilAwake(TIMEOUT_MS)).isTrue();
-    assertThat(sleeperThreads[1].waitUntilAwake(TIMEOUT_MS)).isTrue();
-    assertSleepingStates(new boolean[] {false, false, true, true, true}, sleeperThreads);
-    fakeClock.advanceTime(2000);
-    assertThat(sleeperThreads[2].waitUntilAwake(TIMEOUT_MS)).isTrue();
-    assertThat(sleeperThreads[3].waitUntilAwake(TIMEOUT_MS)).isTrue();
-    assertSleepingStates(new boolean[] {false, false, false, false, true}, sleeperThreads);
-    fakeClock.advanceTime(2000);
-    for (SleeperThread thread : sleeperThreads) {
-      thread.join(TIMEOUT_MS);
-    }
-    assertSleepingStates(new boolean[] {false, false, false, false, false}, sleeperThreads);
-  }
-
   @Test
   public void testPostDelayed() {
     HandlerThread handlerThread = new HandlerThread("FakeClockTest");
@@ -140,12 +93,6 @@ public final class FakeClockTest {
     assertTestRunnableStates(new boolean[] {true, true, true, true, true}, testRunnables);
   }
 
-  private static void assertSleepingStates(boolean[] states, SleeperThread[] sleeperThreads) {
-    for (int i = 0; i < sleeperThreads.length; i++) {
-      assertThat(sleeperThreads[i].isSleeping()).isEqualTo(states[i]);
-    }
-  }
-
   private static void waitForHandler(HandlerWrapper handler) {
     final ConditionVariable handlerFinished = new ConditionVariable();
     handler.post(handlerFinished::open);
@@ -158,48 +105,6 @@ public final class FakeClockTest {
     }
   }
 
-  private static final class SleeperThread extends Thread {
-
-    private final Clock clock;
-    private final long sleepDurationMs;
-    private final CountDownLatch fallAsleepCountDownLatch;
-    private final CountDownLatch wakeUpCountDownLatch;
-
-    private volatile boolean isSleeping;
-
-    public SleeperThread(Clock clock, long sleepDurationMs) {
-      this.clock = clock;
-      this.sleepDurationMs = sleepDurationMs;
-      this.fallAsleepCountDownLatch = new CountDownLatch(1);
-      this.wakeUpCountDownLatch = new CountDownLatch(1);
-    }
-
-    public boolean waitUntilAsleep(long timeoutMs) throws InterruptedException {
-      return fallAsleepCountDownLatch.await(timeoutMs, MILLISECONDS);
-    }
-
-    public boolean waitUntilAwake(long timeoutMs) throws InterruptedException {
-      return wakeUpCountDownLatch.await(timeoutMs, MILLISECONDS);
-    }
-
-    public boolean isSleeping() {
-      return isSleeping;
-    }
-
-    @Override
-    public void run() {
-      // This relies on the FakeClock's methods synchronizing on its own monitor to ensure that
-      // any interactions with it occur only after sleep() has called wait() or returned.
-      synchronized (clock) {
-        isSleeping = true;
-        fallAsleepCountDownLatch.countDown();
-        clock.sleep(sleepDurationMs);
-        isSleeping = false;
-        wakeUpCountDownLatch.countDown();
-      }
-    }
-  }
-
   private static final class TestRunnable implements Runnable {
 
     public boolean hasRun;