Allow equality assertions on FakeExtractorOutput.

The idea here is that you'll be able to feed data through an extractor
to a FakeExtractorOutput, then do the same again with some or all of the
simulated flakiness settings toggled on FakeExtractorInput, and then
assert that the output was the same in both cases.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=117224019

library/src/androidTest/java/com/google/android/exoplayer/testutil/FakeExtractorOutput.java

@@ -21,6 +21,7 @@
 
 import android.util.SparseArray;
 
+import junit.framework.Assert;
 import junit.framework.TestCase;
 
 /**
@@ -32,10 +33,10 @@ public final class FakeExtractorOutput implements ExtractorOutput {
 
   public final SparseArray<FakeTrackOutput> trackOutputs;
 
+  public int numberOfTracks;
   public boolean tracksEnded;
   public SeekMap seekMap;
   public DrmInitData drmInitData;
-  public int numberOfTracks;
 
   public FakeExtractorOutput() {
     this(false);
@@ -74,4 +75,29 @@ public void drmInitData(DrmInitData drmInitData) {
     this.drmInitData = drmInitData;
   }
 
+  public void assertEquals(FakeExtractorOutput expected) {
+    Assert.assertEquals(expected.numberOfTracks, numberOfTracks);
+    Assert.assertEquals(expected.tracksEnded, tracksEnded);
+    if (expected.seekMap == null) {
+      Assert.assertNull(seekMap);
+    } else {
+      // TODO: Bulk up this check if possible.
+      Assert.assertNotNull(seekMap);
+      Assert.assertEquals(expected.seekMap.getClass(), seekMap.getClass());
+      Assert.assertEquals(expected.seekMap.isSeekable(), seekMap.isSeekable());
+      Assert.assertEquals(expected.seekMap.getPosition(0), seekMap.getPosition(0));
+    }
+    if (expected.drmInitData == null) {
+      Assert.assertNull(drmInitData);
+    } else {
+      // TODO: Bulk up this check if possible.
+      Assert.assertNotNull(drmInitData);
+      Assert.assertEquals(expected.drmInitData.getClass(), drmInitData.getClass());
+    }
+    for (int i = 0; i < numberOfTracks; i++) {
+      Assert.assertEquals(expected.trackOutputs.keyAt(i), trackOutputs.keyAt(i));
+      trackOutputs.valueAt(i).assertEquals(expected.trackOutputs.valueAt(i));
+    }
+  }
+
 }

library/src/androidTest/java/com/google/android/exoplayer/testutil/FakeTrackOutput.java

@@ -22,7 +22,7 @@
 
 import android.test.MoreAsserts;
 
-import junit.framework.TestCase;
+import junit.framework.Assert;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -82,21 +82,38 @@ public void sampleMetadata(long timeUs, int flags, int size, int offset, byte[]
   }
 
   public void assertSampleCount(int count) {
-    TestCase.assertEquals(count, sampleTimesUs.size());
+    Assert.assertEquals(count, sampleTimesUs.size());
   }
 
   public void assertSample(int index, byte[] data, long timeUs, int flags, byte[] encryptionKey) {
     byte[] actualData = Arrays.copyOfRange(sampleData, sampleStartOffsets.get(index),
         sampleEndOffsets.get(index));
     MoreAsserts.assertEquals(data, actualData);
-    TestCase.assertEquals(timeUs, (long) sampleTimesUs.get(index));
-    TestCase.assertEquals(flags, (int) sampleFlags.get(index));
+    Assert.assertEquals(timeUs, (long) sampleTimesUs.get(index));
+    Assert.assertEquals(flags, (int) sampleFlags.get(index));
     byte[] sampleEncryptionKey = sampleEncryptionKeys.get(index);
     if (encryptionKey == null) {
-      TestCase.assertEquals(null, sampleEncryptionKey);
+      Assert.assertEquals(null, sampleEncryptionKey);
     } else {
       MoreAsserts.assertEquals(encryptionKey, sampleEncryptionKey);
     }
   }
 
+  public void assertEquals(FakeTrackOutput expected) {
+    Assert.assertEquals(expected.format, format);
+    Assert.assertEquals(expected.sampleTimesUs.size(), sampleTimesUs.size());
+    MoreAsserts.assertEquals(expected.sampleData, sampleData);
+    for (int i = 0; i < sampleTimesUs.size(); i++) {
+      Assert.assertEquals(expected.sampleTimesUs.get(i), sampleTimesUs.get(i));
+      Assert.assertEquals(expected.sampleFlags.get(i), sampleFlags.get(i));
+      Assert.assertEquals(expected.sampleStartOffsets.get(i), sampleStartOffsets.get(i));
+      Assert.assertEquals(expected.sampleEndOffsets.get(i), sampleEndOffsets.get(i));
+      if (expected.sampleEncryptionKeys.get(i) == null) {
+        Assert.assertNull(sampleEncryptionKeys.get(i));
+      } else {
+        MoreAsserts.assertEquals(expected.sampleEncryptionKeys.get(i), sampleEncryptionKeys.get(i));
+      }
+    }
+  }
+
 }