Move Extractor test assertion methods to ExtractorAsserts class.

This cleans up test the TestUtil class that in large parts consisted of
assertions for Extractor tests.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=160829066

extensions/flac/src/androidTest/java/com/google/android/exoplayer2/ext/flac/FlacExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.ext.flac;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link FlacExtractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public class FlacExtractorTest extends InstrumentationTestCase {
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new FlacExtractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/flv/FlvExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.extractor.flv;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link FlvExtractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class FlvExtractorTest extends InstrumentationTestCase {
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new FlvExtractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/mkv/MatroskaExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.extractor.mkv;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Tests for {@link MatroskaExtractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class MatroskaExtractorTest extends InstrumentationTestCase {
 
   public void testMkvSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new MatroskaExtractor();
@@ -34,7 +35,7 @@ public final class MatroskaExtractorTest extends InstrumentationTestCase {
   }
 
   public void testWebmSubsampleEncryption() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new MatroskaExtractor();
@@ -43,7 +44,7 @@ public final class MatroskaExtractorTest extends InstrumentationTestCase {
   }
 
   public void testWebmSubsampleEncryptionWithAltrefFrames() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new MatroskaExtractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/mp3/Mp3ExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.extractor.mp3;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link Mp3Extractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class Mp3ExtractorTest extends InstrumentationTestCase {
 
   public void testMp3Sample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new Mp3Extractor();
@@ -34,7 +35,7 @@ public final class Mp3ExtractorTest extends InstrumentationTestCase {
   }
 
   public void testTrimmedMp3Sample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new Mp3Extractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/mp4/FragmentedMp4ExtractorTest.java

@@ -18,7 +18,8 @@ package com.google.android.exoplayer2.extractor.mp4;
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.ParserException;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link FragmentedMp4Extractor}.
@@ -26,26 +27,28 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class FragmentedMp4ExtractorTest extends InstrumentationTestCase {
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(getExtractorFactory(), "mp4/sample_fragmented.mp4", getInstrumentation());
+    ExtractorAsserts
+        .assertOutput(getExtractorFactory(), "mp4/sample_fragmented.mp4", getInstrumentation());
   }
 
   public void testSampleWithSeiPayloadParsing() throws Exception {
     // Enabling the CEA-608 track enables SEI payload parsing.
-    TestUtil.assertOutput(getExtractorFactory(FragmentedMp4Extractor.FLAG_ENABLE_CEA608_TRACK),
+    ExtractorAsserts.assertOutput(
+        getExtractorFactory(FragmentedMp4Extractor.FLAG_ENABLE_CEA608_TRACK),
         "mp4/sample_fragmented_sei.mp4", getInstrumentation());
   }
 
   public void testAtomWithZeroSize() throws Exception {
-    TestUtil.assertThrows(getExtractorFactory(), "mp4/sample_fragmented_zero_size_atom.mp4",
+    ExtractorAsserts.assertThrows(getExtractorFactory(), "mp4/sample_fragmented_zero_size_atom.mp4",
         getInstrumentation(), ParserException.class);
   }
 
-  private static TestUtil.ExtractorFactory getExtractorFactory() {
+  private static ExtractorFactory getExtractorFactory() {
     return getExtractorFactory(0);
   }
 
-  private static TestUtil.ExtractorFactory getExtractorFactory(final int flags) {
+  private static ExtractorFactory getExtractorFactory(final int flags) {
-    return new TestUtil.ExtractorFactory() {
+    return new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new FragmentedMp4Extractor(flags, null);

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/mp4/Mp4ExtractorTest.java

@@ -18,7 +18,8 @@ package com.google.android.exoplayer2.extractor.mp4;
 import android.annotation.TargetApi;
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Tests for {@link Mp4Extractor}.
@@ -27,7 +28,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class Mp4ExtractorTest extends InstrumentationTestCase {
 
   public void testMp4Sample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new Mp4Extractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/ogg/OggExtractorTest.java

@@ -17,9 +17,10 @@ package com.google.android.exoplayer2.extractor.ogg;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 import com.google.android.exoplayer2.testutil.FakeExtractorInput;
 import com.google.android.exoplayer2.testutil.TestUtil;
-import com.google.android.exoplayer2.testutil.TestUtil.ExtractorFactory;
 import java.io.IOException;
 
 /**
@@ -35,20 +36,21 @@ public final class OggExtractorTest extends InstrumentationTestCase {
   };
 
   public void testOpus() throws Exception {
-    TestUtil.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear.opus", getInstrumentation());
+    ExtractorAsserts.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear.opus", getInstrumentation());
   }
 
   public void testFlac() throws Exception {
-    TestUtil.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear_flac.ogg", getInstrumentation());
+    ExtractorAsserts.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear_flac.ogg", getInstrumentation());
   }
 
   public void testFlacNoSeektable() throws Exception {
-    TestUtil.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear_flac_noseektable.ogg",
+    ExtractorAsserts.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear_flac_noseektable.ogg",
         getInstrumentation());
   }
 
   public void testVorbis() throws Exception {
-    TestUtil.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear_vorbis.ogg", getInstrumentation());
+    ExtractorAsserts.assertOutput(OGG_EXTRACTOR_FACTORY, "ogg/bear_vorbis.ogg",
+        getInstrumentation());
   }
 
   public void testSniffVorbis() throws Exception {

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/rawcc/RawCcExtractorTest.java

@@ -19,7 +19,8 @@ import android.annotation.TargetApi;
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 import com.google.android.exoplayer2.util.MimeTypes;
 
 /**
@@ -29,8 +30,8 @@ import com.google.android.exoplayer2.util.MimeTypes;
 public final class RawCcExtractorTest extends InstrumentationTestCase {
 
   public void testRawCcSample() throws Exception {
-    TestUtil.assertOutput(
+    ExtractorAsserts.assertOutput(
-        new TestUtil.ExtractorFactory() {
+        new ExtractorFactory() {
           @Override
           public Extractor create() {
             return new RawCcExtractor(

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/ts/Ac3ExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.extractor.ts;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link Ac3Extractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class Ac3ExtractorTest extends InstrumentationTestCase {
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new Ac3Extractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/ts/AdtsExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.extractor.ts;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link AdtsExtractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class AdtsExtractorTest extends InstrumentationTestCase {
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new AdtsExtractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/ts/PsExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.extractor.ts;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link PsExtractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class PsExtractorTest extends InstrumentationTestCase {
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new PsExtractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/ts/TsExtractorTest.java

@@ -25,6 +25,8 @@ import com.google.android.exoplayer2.extractor.PositionHolder;
 import com.google.android.exoplayer2.extractor.TrackOutput;
 import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.EsInfo;
 import com.google.android.exoplayer2.extractor.ts.TsPayloadReader.TrackIdGenerator;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 import com.google.android.exoplayer2.testutil.FakeExtractorInput;
 import com.google.android.exoplayer2.testutil.FakeExtractorOutput;
 import com.google.android.exoplayer2.testutil.FakeTrackOutput;
@@ -43,7 +45,7 @@ public final class TsExtractorTest extends InstrumentationTestCase {
   private static final int TS_SYNC_BYTE = 0x47; // First byte of each TS packet.
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new TsExtractor();
@@ -65,7 +67,7 @@ public final class TsExtractorTest extends InstrumentationTestCase {
     writeJunkData(out, random.nextInt(TS_PACKET_SIZE - 1) + 1);
     fileData = out.toByteArray();
 
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new TsExtractor();

library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/wav/WavExtractorTest.java

@@ -17,7 +17,8 @@ package com.google.android.exoplayer2.extractor.wav;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.android.exoplayer2.testutil.ExtractorAsserts.ExtractorFactory;
 
 /**
  * Unit test for {@link WavExtractor}.
@@ -25,7 +26,7 @@ import com.google.android.exoplayer2.testutil.TestUtil;
 public final class WavExtractorTest extends InstrumentationTestCase {
 
   public void testSample() throws Exception {
-    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+    ExtractorAsserts.assertOutput(new ExtractorFactory() {
       @Override
       public Extractor create() {
         return new WavExtractor();

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

@@ -0,0 +1,272 @@
+/*
+ * Copyright (C) 2017 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.testutil;
+
+import android.app.Instrumentation;
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.extractor.Extractor;
+import com.google.android.exoplayer2.extractor.PositionHolder;
+import com.google.android.exoplayer2.extractor.SeekMap;
+import com.google.android.exoplayer2.testutil.FakeExtractorInput.SimulatedIOException;
+import com.google.android.exoplayer2.util.Assertions;
+import java.io.IOException;
+import java.util.Arrays;
+import junit.framework.Assert;
+
+/**
+ * Assertion methods for {@link Extractor}.
+ */
+public final class ExtractorAsserts {
+
+  /**
+   * A factory for {@link Extractor} instances.
+   */
+  public interface ExtractorFactory {
+    Extractor create();
+  }
+
+  private static final String DUMP_EXTENSION = ".dump";
+  private static final String UNKNOWN_LENGTH_EXTENSION = ".unklen" + DUMP_EXTENSION;
+
+  /**
+   * Calls {@link #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean,
+   * boolean)} with all possible combinations of "simulate" parameters.
+   *
+   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
+   *     class which is to be tested.
+   * @param sampleFile The path to the input sample.
+   * @param instrumentation To be used to load the sample file.
+   * @throws IOException If reading from the input fails.
+   * @throws InterruptedException If interrupted while reading from the input.
+   * @see #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean, boolean)
+   */
+  public static void assertOutput(ExtractorFactory factory, String sampleFile,
+      Instrumentation instrumentation) throws IOException, InterruptedException {
+    byte[] fileData = TestUtil.getByteArray(instrumentation, sampleFile);
+    assertOutput(factory, sampleFile, fileData, instrumentation);
+  }
+
+  /**
+   * Calls {@link #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean,
+   * boolean)} with all possible combinations of "simulate" parameters.
+   *
+   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
+   *     class which is to be tested.
+   * @param sampleFile The path to the input sample.
+   * @param fileData Content of the input file.
+   * @param instrumentation To be used to load the sample file.
+   * @throws IOException If reading from the input fails.
+   * @throws InterruptedException If interrupted while reading from the input.
+   * @see #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean, boolean)
+   */
+  public static void assertOutput(ExtractorFactory factory, String sampleFile, byte[] fileData,
+      Instrumentation instrumentation) throws IOException, InterruptedException {
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false, false, false);
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true, false, false);
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false,  true, false);
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true,  true, false);
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false, false,  true);
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true, false,  true);
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false,  true,  true);
+    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true,  true,  true);
+  }
+
+  /**
+   * Asserts that {@code extractor} consumes {@code sampleFile} successfully and its output equals
+   * to a prerecorded output dump file with the name {@code sampleFile} + "{@value
+   * #DUMP_EXTENSION}". If {@code simulateUnknownLength} is true and {@code sampleFile} + "{@value
+   * #UNKNOWN_LENGTH_EXTENSION}" exists, it's preferred.
+   *
+   * @param extractor The {@link Extractor} to be tested.
+   * @param sampleFile The path to the input sample.
+   * @param fileData Content of the input file.
+   * @param instrumentation To be used to load the sample file.
+   * @param simulateIOErrors If true simulates IOErrors.
+   * @param simulateUnknownLength If true simulates unknown input length.
+   * @param simulatePartialReads If true simulates partial reads.
+   * @return The {@link FakeExtractorOutput} used in the test.
+   * @throws IOException If reading from the input fails.
+   * @throws InterruptedException If interrupted while reading from the input.
+   */
+  public static FakeExtractorOutput assertOutput(Extractor extractor, String sampleFile,
+      byte[] fileData, Instrumentation instrumentation, boolean simulateIOErrors,
+      boolean simulateUnknownLength, boolean simulatePartialReads) throws IOException,
+      InterruptedException {
+    FakeExtractorInput input = new FakeExtractorInput.Builder().setData(fileData)
+        .setSimulateIOErrors(simulateIOErrors)
+        .setSimulateUnknownLength(simulateUnknownLength)
+        .setSimulatePartialReads(simulatePartialReads).build();
+
+    Assert.assertTrue(TestUtil.sniffTestData(extractor, input));
+    input.resetPeekPosition();
+    FakeExtractorOutput extractorOutput = consumeTestData(extractor, input, 0, true);
+
+    if (simulateUnknownLength
+        && assetExists(instrumentation, sampleFile + UNKNOWN_LENGTH_EXTENSION)) {
+      extractorOutput.assertOutput(instrumentation, sampleFile + UNKNOWN_LENGTH_EXTENSION);
+    } else {
+      extractorOutput.assertOutput(instrumentation, sampleFile + ".0" + DUMP_EXTENSION);
+    }
+
+    SeekMap seekMap = extractorOutput.seekMap;
+    if (seekMap.isSeekable()) {
+      long durationUs = seekMap.getDurationUs();
+      for (int j = 0; j < 4; j++) {
+        long timeUs = (durationUs * j) / 3;
+        long position = seekMap.getPosition(timeUs);
+        input.setPosition((int) position);
+        for (int i = 0; i < extractorOutput.numberOfTracks; i++) {
+          extractorOutput.trackOutputs.valueAt(i).clear();
+        }
+
+        consumeTestData(extractor, input, timeUs, extractorOutput, false);
+        extractorOutput.assertOutput(instrumentation, sampleFile + '.' + j + DUMP_EXTENSION);
+      }
+    }
+
+    return extractorOutput;
+  }
+
+  /**
+   * Calls {@link #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)} with all
+   * possible combinations of "simulate" parameters.
+   *
+   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
+   *     class which is to be tested.
+   * @param sampleFile The path to the input sample.
+   * @param instrumentation To be used to load the sample file.
+   * @param expectedThrowable Expected {@link Throwable} class.
+   * @throws IOException If reading from the input fails.
+   * @throws InterruptedException If interrupted while reading from the input.
+   * @see #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)
+   */
+  public static void assertThrows(ExtractorFactory factory, String sampleFile,
+      Instrumentation instrumentation, Class<? extends Throwable> expectedThrowable)
+      throws IOException, InterruptedException {
+    byte[] fileData = TestUtil.getByteArray(instrumentation, sampleFile);
+    assertThrows(factory, fileData, expectedThrowable);
+  }
+
+  /**
+   * Calls {@link #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)} with all
+   * possible combinations of "simulate" parameters.
+   *
+   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
+   *     class which is to be tested.
+   * @param fileData Content of the input file.
+   * @param expectedThrowable Expected {@link Throwable} class.
+   * @throws IOException If reading from the input fails.
+   * @throws InterruptedException If interrupted while reading from the input.
+   * @see #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)
+   */
+  public static void assertThrows(ExtractorFactory factory, byte[] fileData,
+      Class<? extends Throwable> expectedThrowable) throws IOException, InterruptedException {
+    assertThrows(factory.create(), fileData, expectedThrowable, false, false, false);
+    assertThrows(factory.create(), fileData, expectedThrowable,  true, false, false);
+    assertThrows(factory.create(), fileData, expectedThrowable, false,  true, false);
+    assertThrows(factory.create(), fileData, expectedThrowable,  true,  true, false);
+    assertThrows(factory.create(), fileData, expectedThrowable, false, false,  true);
+    assertThrows(factory.create(), fileData, expectedThrowable,  true, false,  true);
+    assertThrows(factory.create(), fileData, expectedThrowable, false,  true,  true);
+    assertThrows(factory.create(), fileData, expectedThrowable,  true,  true,  true);
+  }
+
+  /**
+   * Asserts {@code extractor} throws {@code expectedThrowable} while consuming {@code sampleFile}.
+   *
+   * @param extractor The {@link Extractor} to be tested.
+   * @param fileData Content of the input file.
+   * @param expectedThrowable Expected {@link Throwable} class.
+   * @param simulateIOErrors If true simulates IOErrors.
+   * @param simulateUnknownLength If true simulates unknown input length.
+   * @param simulatePartialReads If true simulates partial reads.
+   * @throws IOException If reading from the input fails.
+   * @throws InterruptedException If interrupted while reading from the input.
+   */
+  public static void assertThrows(Extractor extractor, byte[] fileData,
+      Class<? extends Throwable> expectedThrowable, boolean simulateIOErrors,
+      boolean simulateUnknownLength, boolean simulatePartialReads) throws IOException,
+      InterruptedException {
+    FakeExtractorInput input = new FakeExtractorInput.Builder().setData(fileData)
+        .setSimulateIOErrors(simulateIOErrors)
+        .setSimulateUnknownLength(simulateUnknownLength)
+        .setSimulatePartialReads(simulatePartialReads).build();
+    try {
+      consumeTestData(extractor, input, 0, true);
+      throw new AssertionError(expectedThrowable.getSimpleName() + " expected but not thrown");
+    } catch (Throwable throwable) {
+      if (expectedThrowable.equals(throwable.getClass())) {
+        return; // Pass!
+      }
+      throw throwable;
+    }
+  }
+
+  private ExtractorAsserts() {}
+
+  private static FakeExtractorOutput consumeTestData(Extractor extractor, FakeExtractorInput input,
+      long timeUs, boolean retryFromStartIfLive) throws IOException, InterruptedException {
+    FakeExtractorOutput output = new FakeExtractorOutput();
+    extractor.init(output);
+    consumeTestData(extractor, input, timeUs, output, retryFromStartIfLive);
+    return output;
+  }
+
+  private static void consumeTestData(Extractor extractor, FakeExtractorInput input, long timeUs,
+      FakeExtractorOutput output, boolean retryFromStartIfLive)
+      throws IOException, InterruptedException {
+    extractor.seek(input.getPosition(), timeUs);
+    PositionHolder seekPositionHolder = new PositionHolder();
+    int readResult = Extractor.RESULT_CONTINUE;
+    while (readResult != Extractor.RESULT_END_OF_INPUT) {
+      try {
+        // Extractor.read should not read seekPositionHolder.position. Set it to a value that's
+        // likely to cause test failure if a read does occur.
+        seekPositionHolder.position = Long.MIN_VALUE;
+        readResult = extractor.read(input, seekPositionHolder);
+        if (readResult == Extractor.RESULT_SEEK) {
+          long seekPosition = seekPositionHolder.position;
+          Assertions.checkState(0 <= seekPosition && seekPosition <= Integer.MAX_VALUE);
+          input.setPosition((int) seekPosition);
+        }
+      } catch (SimulatedIOException e) {
+        if (!retryFromStartIfLive) {
+          continue;
+        }
+        boolean isOnDemand = input.getLength() != C.LENGTH_UNSET
+            || (output.seekMap != null && output.seekMap.getDurationUs() != C.TIME_UNSET);
+        if (isOnDemand) {
+          continue;
+        }
+        input.setPosition(0);
+        for (int i = 0; i < output.numberOfTracks; i++) {
+          output.trackOutputs.valueAt(i).clear();
+        }
+        extractor.seek(0, 0);
+      }
+    }
+  }
+
+  private static boolean assetExists(Instrumentation instrumentation, String fileName)
+      throws IOException {
+    int i = fileName.lastIndexOf('/');
+    String path = i >= 0 ? fileName.substring(0, i) : "";
+    String file = i >= 0 ? fileName.substring(i + 1) : fileName;
+    return Arrays.asList(instrumentation.getContext().getResources().getAssets().list(path))
+        .contains(file);
+  }
+
+}

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

@@ -21,8 +21,6 @@ import android.test.MoreAsserts;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.extractor.PositionHolder;
-import com.google.android.exoplayer2.extractor.SeekMap;
 import com.google.android.exoplayer2.source.MediaSource;
 import com.google.android.exoplayer2.source.MediaSource.Listener;
 import com.google.android.exoplayer2.testutil.FakeExtractorInput.SimulatedIOException;
@@ -42,23 +40,8 @@ import org.mockito.MockitoAnnotations;
  */
 public class TestUtil {
 
-  /**
-   * A factory for {@link Extractor} instances.
-   */
-  public interface ExtractorFactory {
-    Extractor create();
-  }
-
-  private static final String DUMP_EXTENSION = ".dump";
-  private static final String UNKNOWN_LENGTH_EXTENSION = ".unklen" + DUMP_EXTENSION;
-
   private TestUtil() {}
 
-  public static boolean sniffTestData(Extractor extractor, byte[] data)
-      throws IOException, InterruptedException {
-    return sniffTestData(extractor, newExtractorInput(data));
-  }
-
   public static boolean sniffTestData(Extractor extractor, FakeExtractorInput input)
       throws IOException, InterruptedException {
     while (true) {
@@ -86,54 +69,6 @@ public class TestUtil {
     return Arrays.copyOf(data, position);
   }
 
-  public static FakeExtractorOutput consumeTestData(Extractor extractor, FakeExtractorInput input,
-      long timeUs) throws IOException, InterruptedException {
-    return consumeTestData(extractor, input, timeUs, false);
-  }
-
-  public static FakeExtractorOutput consumeTestData(Extractor extractor, FakeExtractorInput input,
-      long timeUs, boolean retryFromStartIfLive) throws IOException, InterruptedException {
-    FakeExtractorOutput output = new FakeExtractorOutput();
-    extractor.init(output);
-    consumeTestData(extractor, input, timeUs, output, retryFromStartIfLive);
-    return output;
-  }
-
-  private static void consumeTestData(Extractor extractor, FakeExtractorInput input, long timeUs,
-      FakeExtractorOutput output, boolean retryFromStartIfLive)
-      throws IOException, InterruptedException {
-    extractor.seek(input.getPosition(), timeUs);
-    PositionHolder seekPositionHolder = new PositionHolder();
-    int readResult = Extractor.RESULT_CONTINUE;
-    while (readResult != Extractor.RESULT_END_OF_INPUT) {
-      try {
-        // Extractor.read should not read seekPositionHolder.position. Set it to a value that's
-        // likely to cause test failure if a read does occur.
-        seekPositionHolder.position = Long.MIN_VALUE;
-        readResult = extractor.read(input, seekPositionHolder);
-        if (readResult == Extractor.RESULT_SEEK) {
-          long seekPosition = seekPositionHolder.position;
-          Assertions.checkState(0 <= seekPosition && seekPosition <= Integer.MAX_VALUE);
-          input.setPosition((int) seekPosition);
-        }
-      } catch (SimulatedIOException e) {
-        if (!retryFromStartIfLive) {
-          continue;
-        }
-        boolean isOnDemand = input.getLength() != C.LENGTH_UNSET
-            || (output.seekMap != null && output.seekMap.getDurationUs() != C.TIME_UNSET);
-        if (isOnDemand) {
-          continue;
-        }
-        input.setPosition(0);
-        for (int i = 0; i < output.numberOfTracks; i++) {
-          output.trackOutputs.valueAt(i).clear();
-        }
-        extractor.seek(0, 0);
-      }
-    }
-  }
-
   public static byte[] buildTestData(int length) {
     return buildTestData(length, length);
   }
@@ -193,15 +128,6 @@ public class TestUtil {
     MockitoAnnotations.initMocks(instrumentationTestCase);
   }
 
-  public static boolean assetExists(Instrumentation instrumentation, String fileName)
-      throws IOException {
-    int i = fileName.lastIndexOf('/');
-    String path = i >= 0 ? fileName.substring(0, i) : "";
-    String file = i >= 0 ? fileName.substring(i + 1) : fileName;
-    return Arrays.asList(instrumentation.getContext().getResources().getAssets().list(path))
-        .contains(file);
-  }
-
   public static byte[] getByteArray(Instrumentation instrumentation, String fileName)
       throws IOException {
     return Util.toByteArray(getInputStream(instrumentation, fileName));
@@ -217,10 +143,6 @@ public class TestUtil {
     return new String(getByteArray(instrumentation, fileName));
   }
 
-  private static FakeExtractorInput newExtractorInput(byte[] data) {
-    return new FakeExtractorInput.Builder().setData(data).build();
-  }
-
   /**
    * Extracts the timeline from a media source.
    */
@@ -247,180 +169,6 @@ public class TestUtil {
     return listener.timeline;
   }
 
-  /**
-   * Calls {@link #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean,
-   * boolean)} with all possible combinations of "simulate" parameters.
-   *
-   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
-   *     class which is to be tested.
-   * @param sampleFile The path to the input sample.
-   * @param instrumentation To be used to load the sample file.
-   * @throws IOException If reading from the input fails.
-   * @throws InterruptedException If interrupted while reading from the input.
-   * @see #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean, boolean)
-   */
-  public static void assertOutput(ExtractorFactory factory, String sampleFile,
-      Instrumentation instrumentation) throws IOException, InterruptedException {
-    byte[] fileData = getByteArray(instrumentation, sampleFile);
-    assertOutput(factory, sampleFile, fileData, instrumentation);
-  }
-
-  /**
-   * Calls {@link #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean,
-   * boolean)} with all possible combinations of "simulate" parameters.
-   *
-   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
-   *     class which is to be tested.
-   * @param sampleFile The path to the input sample.
-   * @param fileData Content of the input file.
-   * @param instrumentation To be used to load the sample file.
-   * @throws IOException If reading from the input fails.
-   * @throws InterruptedException If interrupted while reading from the input.
-   * @see #assertOutput(Extractor, String, byte[], Instrumentation, boolean, boolean, boolean)
-   */
-  public static void assertOutput(ExtractorFactory factory, String sampleFile, byte[] fileData,
-      Instrumentation instrumentation) throws IOException, InterruptedException {
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false, false, false);
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true, false, false);
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false,  true, false);
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true,  true, false);
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false, false,  true);
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true, false,  true);
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation, false,  true,  true);
-    assertOutput(factory.create(), sampleFile, fileData, instrumentation,  true,  true,  true);
-  }
-
-  /**
-   * Asserts that {@code extractor} consumes {@code sampleFile} successfully and its output equals
-   * to a prerecorded output dump file with the name {@code sampleFile} + "{@value
-   * #DUMP_EXTENSION}". If {@code simulateUnknownLength} is true and {@code sampleFile} + "{@value
-   * #UNKNOWN_LENGTH_EXTENSION}" exists, it's preferred.
-   *
-   * @param extractor The {@link Extractor} to be tested.
-   * @param sampleFile The path to the input sample.
-   * @param fileData Content of the input file.
-   * @param instrumentation To be used to load the sample file.
-   * @param simulateIOErrors If true simulates IOErrors.
-   * @param simulateUnknownLength If true simulates unknown input length.
-   * @param simulatePartialReads If true simulates partial reads.
-   * @return The {@link FakeExtractorOutput} used in the test.
-   * @throws IOException If reading from the input fails.
-   * @throws InterruptedException If interrupted while reading from the input.
-   */
-  public static FakeExtractorOutput assertOutput(Extractor extractor, String sampleFile,
-      byte[] fileData, Instrumentation instrumentation, boolean simulateIOErrors,
-      boolean simulateUnknownLength, boolean simulatePartialReads) throws IOException,
-      InterruptedException {
-    FakeExtractorInput input = new FakeExtractorInput.Builder().setData(fileData)
-        .setSimulateIOErrors(simulateIOErrors)
-        .setSimulateUnknownLength(simulateUnknownLength)
-        .setSimulatePartialReads(simulatePartialReads).build();
-
-    Assert.assertTrue(sniffTestData(extractor, input));
-    input.resetPeekPosition();
-    FakeExtractorOutput extractorOutput = consumeTestData(extractor, input, 0, true);
-
-    if (simulateUnknownLength
-        && assetExists(instrumentation, sampleFile + UNKNOWN_LENGTH_EXTENSION)) {
-      extractorOutput.assertOutput(instrumentation, sampleFile + UNKNOWN_LENGTH_EXTENSION);
-    } else {
-      extractorOutput.assertOutput(instrumentation, sampleFile + ".0" + DUMP_EXTENSION);
-    }
-
-    SeekMap seekMap = extractorOutput.seekMap;
-    if (seekMap.isSeekable()) {
-      long durationUs = seekMap.getDurationUs();
-      for (int j = 0; j < 4; j++) {
-        long timeUs = (durationUs * j) / 3;
-        long position = seekMap.getPosition(timeUs);
-        input.setPosition((int) position);
-        for (int i = 0; i < extractorOutput.numberOfTracks; i++) {
-          extractorOutput.trackOutputs.valueAt(i).clear();
-        }
-
-        consumeTestData(extractor, input, timeUs, extractorOutput, false);
-        extractorOutput.assertOutput(instrumentation, sampleFile + '.' + j + DUMP_EXTENSION);
-      }
-    }
-
-    return extractorOutput;
-  }
-
-  /**
-   * Calls {@link #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)} with all
-   * possible combinations of "simulate" parameters.
-   *
-   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
-   *     class which is to be tested.
-   * @param sampleFile The path to the input sample.
-   * @param instrumentation To be used to load the sample file.
-   * @param expectedThrowable Expected {@link Throwable} class.
-   * @throws IOException If reading from the input fails.
-   * @throws InterruptedException If interrupted while reading from the input.
-   * @see #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)
-   */
-  public static void assertThrows(ExtractorFactory factory, String sampleFile,
-      Instrumentation instrumentation, Class<? extends Throwable> expectedThrowable)
-      throws IOException, InterruptedException {
-    byte[] fileData = getByteArray(instrumentation, sampleFile);
-    assertThrows(factory, fileData, expectedThrowable);
-  }
-
-  /**
-   * Calls {@link #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)} with all
-   * possible combinations of "simulate" parameters.
-   *
-   * @param factory An {@link ExtractorFactory} which creates instances of the {@link Extractor}
-   *     class which is to be tested.
-   * @param fileData Content of the input file.
-   * @param expectedThrowable Expected {@link Throwable} class.
-   * @throws IOException If reading from the input fails.
-   * @throws InterruptedException If interrupted while reading from the input.
-   * @see #assertThrows(Extractor, byte[], Class, boolean, boolean, boolean)
-   */
-  public static void assertThrows(ExtractorFactory factory, byte[] fileData,
-      Class<? extends Throwable> expectedThrowable) throws IOException, InterruptedException {
-    assertThrows(factory.create(), fileData, expectedThrowable, false, false, false);
-    assertThrows(factory.create(), fileData, expectedThrowable,  true, false, false);
-    assertThrows(factory.create(), fileData, expectedThrowable, false,  true, false);
-    assertThrows(factory.create(), fileData, expectedThrowable,  true,  true, false);
-    assertThrows(factory.create(), fileData, expectedThrowable, false, false,  true);
-    assertThrows(factory.create(), fileData, expectedThrowable,  true, false,  true);
-    assertThrows(factory.create(), fileData, expectedThrowable, false,  true,  true);
-    assertThrows(factory.create(), fileData, expectedThrowable,  true,  true,  true);
-  }
-
-  /**
-   * Asserts {@code extractor} throws {@code expectedThrowable} while consuming {@code sampleFile}.
-   *
-   * @param extractor The {@link Extractor} to be tested.
-   * @param fileData Content of the input file.
-   * @param expectedThrowable Expected {@link Throwable} class.
-   * @param simulateIOErrors If true simulates IOErrors.
-   * @param simulateUnknownLength If true simulates unknown input length.
-   * @param simulatePartialReads If true simulates partial reads.
-   * @throws IOException If reading from the input fails.
-   * @throws InterruptedException If interrupted while reading from the input.
-   */
-  public static void assertThrows(Extractor extractor, byte[] fileData,
-      Class<? extends Throwable> expectedThrowable, boolean simulateIOErrors,
-      boolean simulateUnknownLength, boolean simulatePartialReads) throws IOException,
-      InterruptedException {
-    FakeExtractorInput input = new FakeExtractorInput.Builder().setData(fileData)
-        .setSimulateIOErrors(simulateIOErrors)
-        .setSimulateUnknownLength(simulateUnknownLength)
-        .setSimulatePartialReads(simulatePartialReads).build();
-    try {
-      consumeTestData(extractor, input, 0, true);
-      throw new AssertionError(expectedThrowable.getSimpleName() + " expected but not thrown");
-    } catch (Throwable throwable) {
-      if (expectedThrowable.equals(throwable.getClass())) {
-        return; // Pass!
-      }
-      throw throwable;
-    }
-  }
-
   /**
    * Asserts that data read from a {@link DataSource} matches {@code expected}.
    *