Add a test for SampleQueue capacity increases

Also remove redundant line

PiperOrigin-RevId: 283956203

library/core/src/main/java/com/google/android/exoplayer2/source/SampleQueue.java

@@ -17,6 +17,7 @@ package com.google.android.exoplayer2.source;
 
 import android.os.Looper;
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.FormatHolder;
@@ -49,7 +50,7 @@ public class SampleQueue implements TrackOutput {
 
   public static final int ADVANCE_FAILED = -1;
 
-  private static final int SAMPLE_CAPACITY_INCREMENT = 1000;
+  @VisibleForTesting /* package */ static final int SAMPLE_CAPACITY_INCREMENT = 1000;
 
   private final SampleDataQueue sampleDataQueue;
   private final SampleExtrasHolder extrasHolder;
@@ -652,7 +653,6 @@ public class SampleQueue implements TrackOutput {
       formats = newFormats;
       sourceIds = newSourceIds;
       relativeFirstIndex = 0;
-      length = capacity;
       capacity = newCapacity;
     }
   }

library/core/src/test/java/com/google/android/exoplayer2/source/SampleQueueTest.java

@@ -158,6 +158,34 @@ public final class SampleQueueTest {
   }
 
   @Test
+  public void testCapacityIncreases() {
+    int numberOfSamplesToInput = 3 * SampleQueue.SAMPLE_CAPACITY_INCREMENT + 1;
+    sampleQueue.format(FORMAT_1);
+    sampleQueue.sampleData(
+        new ParsableByteArray(numberOfSamplesToInput), /* length= */ numberOfSamplesToInput);
+    for (int i = 0; i < numberOfSamplesToInput; i++) {
+      sampleQueue.sampleMetadata(
+          /* timeUs= */ i * 1000,
+          /* flags= */ C.BUFFER_FLAG_KEY_FRAME,
+          /* size= */ 1,
+          /* offset= */ numberOfSamplesToInput - i - 1,
+          /* cryptoData= */ null);
+    }
+
+    assertReadFormat(/* formatRequired= */ false, FORMAT_1);
+    for (int i = 0; i < numberOfSamplesToInput; i++) {
+      assertReadSample(
+          /* timeUs= */ i * 1000,
+          /* isKeyFrame= */ true,
+          /* isEncrypted= */ false,
+          /* sampleData= */ new byte[1],
+          /* offset= */ 0,
+          /* length= */ 1);
+    }
+    assertReadNothing(/* formatRequired= */ false);
+  }
+
+  @Test
   public void testResetReleasesAllocations() {
     writeTestData();
     assertAllocationCount(10);