}

  // Test that you can not expand the readable data in a previously sliced ByteSource.
  public void testSlice_constrainedRange() throws IOException {
    long size = source.read().length;
    if (size >= 2) {
      ByteSource sliced = source.slice(1, size - 2);
      assertEquals(size - 2, sliced.read().length);
      ByteSource resliced = sliced.slice(0, size - 1);
      assertTrue(sliced.contentEquals(resliced));
    }

        } else {
          return TO_BYTE_ARRAY_NEW_STRING.read(byteSource, cs);
        }
      }
    };

    abstract String read(ByteSource byteSource, Charset cs) throws IOException;
  }

  @Param({"UTF-8"})
  String charsetName;

  @Param ReadStrategy strategy;

  @Param({"10", "1024", "1048576"})
  int size;

  Charset charset;
  ByteSource data;

  @BeforeExperiment
  public void setUp() {

        } else {
          return TO_BYTE_ARRAY_NEW_STRING.read(byteSource, cs);
        }
      }
    };

    abstract String read(ByteSource byteSource, Charset cs) throws IOException;
  }

  @Param({"UTF-8"})
  String charsetName;

  @Param ReadStrategy strategy;

  @Param({"10", "1024", "1048576"})
  int size;

  Charset charset;
  ByteSource data;

  @BeforeExperiment
  public void setUp() {

    File file = fileAndSource.file;
    WeakReference<ByteSource> sourceRef = fileAndSource.sourceRef;
    fileAndSource = null;
    awaitClear(sourceRef);
    awaitDone(() -> !file.exists());
  }

  private static final class FileAndWeakByteSource {
    final File file;
    final WeakReference<ByteSource> sourceRef;

    FileAndWeakByteSource(File file, WeakReference<ByteSource> sourceRef) {
      this.file = file;

  }

  // Test that you can not expand the readable data in a previously sliced ByteSource.
  public void testSlice_constrainedRange() throws IOException {
    long size = source.read().length;
    if (size >= 2) {
      ByteSource sliced = source.slice(1, size - 2);
      assertEquals(size - 2, sliced.read().length);
      ByteSource resliced = sliced.slice(0, size - 1);
      assertTrue(sliced.contentEquals(resliced));
    }

@GwtIncompatible
final class MultiInputStream extends InputStream {

  private final Iterator<? extends ByteSource> it;
  private @Nullable InputStream in;

  /**
   * Creates a new instance.
   *
   * @param it an iterator of I/O suppliers that will provide each substream
   */
  public MultiInputStream(Iterator<? extends ByteSource> it) throws IOException {
    this.it = checkNotNull(it);
    advance();
  }

  @Override

  private final TestByteSource byteSource;

  public TestCharSource(String content, TestOption... options) {
    this.byteSource = new TestByteSource(content.getBytes(UTF_8), options);
  }

  @Override
  public boolean wasStreamOpened() {
    return byteSource.wasStreamOpened();
  }

  @Override
  public boolean wasStreamClosed() {
    return byteSource.wasStreamClosed();
  }

  @Override

    S createSink() throws IOException;

    /** Gets the current content of the created sink. */
    T getSinkContents() throws IOException;
  }

  /** Factory for {@link ByteSource} instances. */
  interface ByteSourceFactory extends SourceFactory<ByteSource, byte[]> {}

  /** Factory for {@link ByteSink} instances. */
  interface ByteSinkFactory extends SinkFactory<ByteSink, byte[]> {}

  /** Factory for {@link CharSource} instances. */

  private final TestByteSource byteSource;

  public TestCharSource(String content, TestOption... options) {
    this.byteSource = new TestByteSource(content.getBytes(UTF_8), options);
  }

  @Override
  public boolean wasStreamOpened() {
    return byteSource.wasStreamOpened();
  }

  @Override
  public boolean wasStreamClosed() {
    return byteSource.wasStreamClosed();
  }

  @Override

    S createSink() throws IOException;

    /** Gets the current content of the created sink. */
    T getSinkContents() throws IOException;
  }

  /** Factory for {@link ByteSource} instances. */
  interface ByteSourceFactory extends SourceFactory<ByteSource, byte[]> {}

  /** Factory for {@link ByteSink} instances. */
  interface ByteSinkFactory extends SinkFactory<ByteSink, byte[]> {}

  /** Factory for {@link CharSource} instances. */