Publish test utils modules as release artificats.

This allows external users to easily write unit tests involving ExoPlayer
instances.

Issue:#6267
PiperOrigin-RevId: 266741790

RELEASENOTES.md

@@ -56,6 +56,8 @@
   [#4249](https://github.com/google/ExoPlayer/issues/4249),
   [#4319](https://github.com/google/ExoPlayer/issues/4319),
   [#4337](https://github.com/google/ExoPlayer/issues/4337)).
+* Publish `testutils` module to simplify unit testing with ExoPlayer
+  ([#6267](https://github.com/google/ExoPlayer/issues/6267)).
 
 ### 2.10.4 ###
 

testutils/README.md

+# ExoPlayer test utils #
+
+Provides utility classes for ExoPlayer unit and instrumentation tests.
+
+## Links ##
+
+* [Javadoc][]: Classes matching `com.google.android.exoplayer2.testutil`
+  belong to this module.
+
+[Javadoc]: https://exoplayer.dev/doc/reference/index.html

testutils/build.gradle

@@ -49,3 +49,14 @@ dependencies {
     testImplementation project(modulePrefix + 'testutils')
     testImplementation 'org.robolectric:robolectric:' + robolectricVersion
 }
+
+ext {
+    javadocTitle = 'Test utils'
+}
+apply from: '../javadoc_library.gradle'
+
+ext {
+    releaseArtifact = 'exoplayer-testutils'
+    releaseDescription = 'Test utils for ExoPlayer.'
+}
+apply from: '../publish.gradle'

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

@@ -311,12 +311,12 @@ public final class ActionSchedule {
 
     /**
      * Schedules a new source preparation action to be executed.
-     * @see com.google.android.exoplayer2.ExoPlayer#prepare(MediaSource, boolean, boolean).
      *
+     * @see com.google.android.exoplayer2.ExoPlayer#prepare(MediaSource, boolean, boolean)
      * @return The builder, for convenience.
      */
-    public Builder prepareSource(MediaSource mediaSource, boolean resetPosition,
-        boolean resetState) {
+    public Builder prepareSource(
+        MediaSource mediaSource, boolean resetPosition, boolean resetState) {
       return apply(new PrepareSource(tag, mediaSource, resetPosition, resetState));
     }
 

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

@@ -34,7 +34,7 @@ import java.util.List;
 
 /**
  * Fake {@link MediaPeriod} that provides tracks from the given {@link TrackGroupArray}. Selecting a
- * track will give the player a {@link ChunkSampleStream<FakeChunkSource>}.
+ * track will give the player a {@link ChunkSampleStream}.
  */
 public class FakeAdaptiveMediaPeriod extends FakeMediaPeriod
     implements SequenceableLoader.Callback<ChunkSampleStream<FakeChunkSource>> {