content: /*
   * Copyright (C) 2020 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.metadata.dvbsi;
  
  import static com.google.android.exoplayer2.testutil.TestUtil.createByteArray;
  import static com.google.android.exoplayer2.testutil.TestUtil.createMetadataInputBuffer;
  import static com.google.common.truth.Truth.assertThat;
  import static org.junit.Assert.assertThrows;
  
  import androidx.test.core.app.ApplicationProvider;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.metadata.Metadata;
  import com.google.android.exoplayer2.metadata.MetadataInputBuffer;
  import com.google.android.exoplayer2.testutil.TestUtil;
  import java.io.IOException;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Tests for {@link AppInfoTableDecoder}. */
  @RunWith(AndroidJUnit4.class)
  public final class AppInfoTableDecoderTest {
  
    private static final String TYPICAL_FILE = "media/dvbsi/ait_typical.bin";
    private static final String NO_URL_BASE_FILE = "media/dvbsi/ait_no_url_base.bin";
    private static final String NO_URL_PATH_FILE = "media/dvbsi/ait_no_url_path.bin";
  
    @Test
    public void decode_typical() throws Exception {
      AppInfoTableDecoder decoder = new AppInfoTableDecoder();
      Metadata metadata = decoder.decode(createMetadataInputBuffer(readTestFile(TYPICAL_FILE)));
  
      assertThat(metadata.length()).isEqualTo(2);
      Metadata.Entry firstEntry = metadata.get(0);
      assertThat(firstEntry).isInstanceOf(AppInfoTable.class);
      assertThat(((AppInfoTable) firstEntry).controlCode)
          .isEqualTo(AppInfoTable.CONTROL_CODE_AUTOSTART);
      assertThat(((AppInfoTable) firstEntry).url).isEqualTo("http://example.com/path/foo");
      Metadata.Entry secondEntry = metadata.get(1);
      assertThat(secondEntry).isInstanceOf(AppInfoTable.class);
      assertThat(((AppInfoTable) secondEntry).controlCode)
          .isEqualTo(AppInfoTable.CONTROL_CODE_PRESENT);
      assertThat(((AppInfoTable) secondEntry).url).isEqualTo("http://google.com/path/bar");
    }
  
    @Test
    public void decode_noUrlBase() throws Exception {
      AppInfoTableDecoder decoder = new AppInfoTableDecoder();
      Metadata metadata = decoder.decode(createMetadataInputBuffer(readTestFile(NO_URL_BASE_FILE)));
  
      assertThat(metadata).isNull();
    }
  
    @Test
    public void decode_noUrlPath() throws Exception {
      AppInfoTableDecoder decoder = new AppInfoTableDecoder();
      Metadata metadata = decoder.decode(createMetadataInputBuffer(readTestFile(NO_URL_PATH_FILE)));
  
      assertThat(metadata).isNull();
    }
  
    @Test
    public void decode_failsIfPositionNonZero() {
      AppInfoTableDecoder decoder = new AppInfoTableDecoder();
      MetadataInputBuffer buffer = createMetadataInputBuffer(createByteArray(1, 2, 3));
      buffer.data.position(1);
  
      assertThrows(IllegalArgumentException.class, () -> decoder.decode(buffer));
    }
  
    @Test
    public void decode_failsIfBufferHasNoArray() {
      AppInfoTableDecoder decoder = new AppInfoTableDecoder();
      MetadataInputBuffer buffer = createMetadataInputBuffer(createByteArray(1, 2, 3));
      buffer.data = buffer.data.asReadOnlyBuffer();
  
      assertThrows(IllegalArgumentException.class, () -> decoder.decode(buffer));
    }
  
    @Test
    public void decode_failsIfArrayOffsetNonZero() {
      AppInfoTableDecoder decoder = new AppInfoTableDecoder();
      MetadataInputBuffer buffer = createMetadataInputBuffer(createByteArray(1, 2, 3));
      buffer.data.position(1);
      buffer.data = buffer.data.slice();
  
      assertThrows(IllegalArgumentException.class, () -> decoder.decode(buffer));
    }
  
    private static byte[] readTestFile(String name) throws IOException {
      return TestUtil.getByteArray(ApplicationProvider.getApplicationContext(), name);
    }
  }
  