content: /*
   * Copyright (C) 2016 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.extractor;
  
  import static com.google.common.truth.Truth.assertThat;
  
  import android.net.Uri;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.extractor.amr.AmrExtractor;
  import com.google.android.exoplayer2.extractor.avi.AviExtractor;
  import com.google.android.exoplayer2.extractor.flac.FlacExtractor;
  import com.google.android.exoplayer2.extractor.flv.FlvExtractor;
  import com.google.android.exoplayer2.extractor.jpeg.JpegExtractor;
  import com.google.android.exoplayer2.extractor.mkv.MatroskaExtractor;
  import com.google.android.exoplayer2.extractor.mp3.Mp3Extractor;
  import com.google.android.exoplayer2.extractor.mp4.FragmentedMp4Extractor;
  import com.google.android.exoplayer2.extractor.mp4.Mp4Extractor;
  import com.google.android.exoplayer2.extractor.ogg.OggExtractor;
  import com.google.android.exoplayer2.extractor.ts.Ac3Extractor;
  import com.google.android.exoplayer2.extractor.ts.Ac4Extractor;
  import com.google.android.exoplayer2.extractor.ts.AdtsExtractor;
  import com.google.android.exoplayer2.extractor.ts.PsExtractor;
  import com.google.android.exoplayer2.extractor.ts.TsExtractor;
  import com.google.android.exoplayer2.extractor.wav.WavExtractor;
  import com.google.android.exoplayer2.util.MimeTypes;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Unit test for {@link DefaultExtractorsFactory}. */
  @RunWith(AndroidJUnit4.class)
  public final class DefaultExtractorsFactoryTest {
  
    @Test
    public void createExtractors_withoutMediaInfo_optimizesSniffingOrder() {
      DefaultExtractorsFactory defaultExtractorsFactory = new DefaultExtractorsFactory();
  
      Extractor[] extractors = defaultExtractorsFactory.createExtractors();
  
      List<Class<? extends Extractor>> extractorClasses = getExtractorClasses(extractors);
      assertThat(extractorClasses.subList(0, 3))
          .containsExactly(FlvExtractor.class, FlacExtractor.class, WavExtractor.class)
          .inOrder();
      assertThat(extractorClasses.subList(3, 5))
          .containsExactly(Mp4Extractor.class, FragmentedMp4Extractor.class);
      assertThat(extractorClasses.subList(5, extractors.length))
          .containsExactly(
              AmrExtractor.class,
              PsExtractor.class,
              OggExtractor.class,
              TsExtractor.class,
              MatroskaExtractor.class,
              AdtsExtractor.class,
              Ac3Extractor.class,
              Ac4Extractor.class,
              Mp3Extractor.class,
              AviExtractor.class,
              JpegExtractor.class)
          .inOrder();
    }
  
    @Test
    public void createExtractors_withMediaInfo_startsWithExtractorsMatchingHeadersAndThenUri() {
      DefaultExtractorsFactory defaultExtractorsFactory = new DefaultExtractorsFactory();
      Uri uri = Uri.parse("test.mp3");
      Map<String, List<String>> responseHeaders = new HashMap<>();
      responseHeaders.put("Content-Type", Collections.singletonList(MimeTypes.VIDEO_MP4));
  
      Extractor[] extractors = defaultExtractorsFactory.createExtractors(uri, responseHeaders);
  
      List<Class<? extends Extractor>> extractorClasses = getExtractorClasses(extractors);
      assertThat(extractorClasses.subList(0, 2))
          .containsExactly(Mp4Extractor.class, FragmentedMp4Extractor.class);
      assertThat(extractorClasses.get(2)).isEqualTo(Mp3Extractor.class);
    }
  
    @Test
    public void createExtractors_withMediaInfo_optimizesSniffingOrder() {
      DefaultExtractorsFactory defaultExtractorsFactory = new DefaultExtractorsFactory();
      Uri uri = Uri.parse("test.mp3");
      Map<String, List<String>> responseHeaders = new HashMap<>();
      responseHeaders.put("Content-Type", Collections.singletonList(MimeTypes.VIDEO_MP4));
  
      Extractor[] extractors = defaultExtractorsFactory.createExtractors(uri, responseHeaders);
  
      List<Class<? extends Extractor>> extractorClasses = getExtractorClasses(extractors);
      assertThat(extractorClasses.subList(3, extractors.length))
          .containsExactly(
              FlvExtractor.class,
              FlacExtractor.class,
              WavExtractor.class,
              AmrExtractor.class,
              PsExtractor.class,
              OggExtractor.class,
              TsExtractor.class,
              MatroskaExtractor.class,
              AdtsExtractor.class,
              Ac3Extractor.class,
              Ac4Extractor.class,
              AviExtractor.class,
              JpegExtractor.class)
          .inOrder();
    }
  
    private static List<Class<? extends Extractor>> getExtractorClasses(Extractor[] extractors) {
      List<Class<? extends Extractor>> extractorClasses = new ArrayList<>();
      for (Extractor extractor : extractors) {
        extractorClasses.add(extractor.getClass());
      }
      return extractorClasses;
    }
  }
  