assertTrue(source.wasStreamOpened() && source.wasStreamClosed());
  }

  public void testRead_withProcessor() throws IOException {
    byte[] processedBytes = new byte[bytes.length];
    ByteProcessor<byte[]> processor =
        new ByteProcessor<byte[]>() {
          int pos;

          @Override
          public boolean processBytes(byte[] buf, int off, int len) throws IOException {

    assertTrue(source.wasStreamOpened() && source.wasStreamClosed());
  }

  public void testRead_withProcessor() throws IOException {
    byte[] processedBytes = new byte[bytes.length];
    ByteProcessor<byte[]> processor =
        new ByteProcessor<byte[]>() {
          int pos;

          @Override
          public boolean processBytes(byte[] buf, int off, int len) throws IOException {

    assertThat(Files.getNameWithoutExtension("/foo/.bar/blah")).isEqualTo("blah");
  }

  public void testReadBytes() throws IOException {
    ByteProcessor<byte[]> processor =
        new ByteProcessor<byte[]>() {
          private final ByteArrayOutputStream out = new ByteArrayOutputStream();

          @Override

              }
            }));
  }

  public void testRead_usingByteProcessor() throws IOException {
    byte[] readBytes =
        source.read(
            new ByteProcessor<byte[]>() {
              final ByteArrayOutputStream out = new ByteArrayOutputStream();

              @Override
              public boolean processBytes(byte[] buf, int off, int len) throws IOException {

    assertThat(ByteStreams.readBytes(new ByteArrayInputStream(array), new TestByteProcessor()))
        .isEqualTo(array);
  }

  private static class TestByteProcessor implements ByteProcessor<byte[]> {
    private final ByteArrayOutputStream out = new ByteArrayOutputStream();

    @Override
    public boolean processBytes(byte[] buf, int off, int len) {
      out.write(buf, off, len);

    assertThat(ByteStreams.readBytes(new ByteArrayInputStream(array), new TestByteProcessor()))
        .isEqualTo(array);
  }

  private static class TestByteProcessor implements ByteProcessor<byte[]> {
    private final ByteArrayOutputStream out = new ByteArrayOutputStream();

    @Override
    public boolean processBytes(byte[] buf, int off, int len) {
      out.write(buf, off, len);

              }
            }));
  }

  public void testRead_usingByteProcessor() throws IOException {
    byte[] readBytes =
        source.read(
            new ByteProcessor<byte[]>() {
              final ByteArrayOutputStream out = new ByteArrayOutputStream();

              @Override
              public boolean processBytes(byte[] buf, int off, int len) throws IOException {

   */
  @CanIgnoreReturnValue // some processors won't return a useful result
  @ParametricNullness
  @J2ktIncompatible
  public static <T extends @Nullable Object> T readBytes(
      InputStream input, ByteProcessor<T> processor) throws IOException {
    checkNotNull(input);
    checkNotNull(processor);

    byte[] buf = createBuffer();
    int read;
    do {
      read = input.read(buf);