content: /*
   * 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.upstream;
  
  import static com.google.common.truth.Truth.assertThat;
  import static junit.framework.Assert.fail;
  
  import android.net.Uri;
  import androidx.test.core.app.ApplicationProvider;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.testutil.AssetContentProvider;
  import com.google.android.exoplayer2.testutil.TestUtil;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.util.Arrays;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Unit tests for {@link ContentDataSource}. */
  @RunWith(AndroidJUnit4.class)
  public final class ContentDataSourceTest {
  
    private static final String DATA_PATH = "media/mp3/1024_incrementing_bytes.mp3";
  
    @Test
    public void read() throws Exception {
      assertData(0, C.LENGTH_UNSET, false);
    }
  
    @Test
    public void readPipeMode() throws Exception {
      assertData(0, C.LENGTH_UNSET, true);
    }
  
    @Test
    public void readFixedLength() throws Exception {
      assertData(0, 100, false);
    }
  
    @Test
    public void readFromOffsetToEndOfInput() throws Exception {
      assertData(1, C.LENGTH_UNSET, false);
    }
  
    @Test
    public void readFromOffsetToEndOfInputPipeMode() throws Exception {
      assertData(1, C.LENGTH_UNSET, true);
    }
  
    @Test
    public void readFromOffsetFixedLength() throws Exception {
      assertData(1, 100, false);
    }
  
    @Test
    public void readInvalidUri() throws Exception {
      ContentDataSource dataSource =
          new ContentDataSource(ApplicationProvider.getApplicationContext());
      Uri contentUri = AssetContentProvider.buildUri("does/not.exist", false);
      DataSpec dataSpec = new DataSpec(contentUri);
      try {
        dataSource.open(dataSpec);
        fail();
      } catch (ContentDataSource.ContentDataSourceException e) {
        // Expected.
        assertThat(e).hasCauseThat().isInstanceOf(FileNotFoundException.class);
      } finally {
        dataSource.close();
      }
    }
  
    private static void assertData(int offset, int length, boolean pipeMode) throws IOException {
      Uri contentUri = AssetContentProvider.buildUri(DATA_PATH, pipeMode);
      ContentDataSource dataSource =
          new ContentDataSource(ApplicationProvider.getApplicationContext());
      try {
        DataSpec dataSpec = new DataSpec(contentUri, offset, length);
        byte[] completeData =
            TestUtil.getByteArray(ApplicationProvider.getApplicationContext(), DATA_PATH);
        byte[] expectedData =
            Arrays.copyOfRange(
                completeData,
                offset,
                length == C.LENGTH_UNSET ? completeData.length : offset + length);
        TestUtil.assertDataSourceContent(dataSource, dataSpec, expectedData, !pipeMode);
      } finally {
        dataSource.close();
      }
    }
  }
  