Unit tests for `WakeLockManager`.

PiperOrigin-RevId: 300727785

library/core/src/test/java/com/google/android/exoplayer2/WakeLockManagerTest.java

+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.exoplayer2;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.os.PowerManager.WakeLock;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.shadows.ShadowPowerManager;
+
+/** Unit tests for {@link WakeLockManager} */
+@RunWith(AndroidJUnit4.class)
+public class WakeLockManagerTest {
+
+  private Context context;
+
+  @Before
+  public void setUp() {
+    context = ApplicationProvider.getApplicationContext();
+  }
+
+  @Test
+  public void stayAwakeFalse_wakeLockIsNeverHeld() {
+    WakeLockManager wakeLockManager = new WakeLockManager(context);
+    wakeLockManager.setEnabled(true);
+    wakeLockManager.setStayAwake(false);
+
+    WakeLock wakeLock = ShadowPowerManager.getLatestWakeLock();
+    assertThat(wakeLock.isHeld()).isFalse();
+
+    wakeLockManager.setEnabled(false);
+
+    assertThat(wakeLock.isHeld()).isFalse();
+  }
+
+  @Test
+  public void stayAwakeTrue_wakeLockIsOnlyHeldWhenEnabled() {
+    WakeLockManager wakeLockManager = new WakeLockManager(context);
+    wakeLockManager.setEnabled(true);
+    wakeLockManager.setStayAwake(true);
+
+    WakeLock wakeLock = ShadowPowerManager.getLatestWakeLock();
+
+    assertThat(wakeLock.isHeld()).isTrue();
+
+    wakeLockManager.setEnabled(false);
+
+    assertThat(wakeLock.isHeld()).isFalse();
+  }
+}