ww, err := w.CreateHeader(f.header)
			if err != nil {
				t.Fatalf("unable to write previously parsed header: %s", err)
			}
			if _, err := ww.Write(f.content); err != nil {
				t.Fatalf("unable to write previously parsed content: %s", err)
			}
		}

		if err := w.Close(); err != nil {
			t.Fatalf("Unable to write archive: %s", err)
		}

		// TODO: We may want to check if the archive roundtrips.
	})

  public void testAsOutputStream() throws Exception {
    PrimitiveSink sink = mock(PrimitiveSink.class);
    OutputStream out = Funnels.asOutputStream(sink);
    byte[] bytes = {1, 2, 3, 4};
    out.write(255);
    out.write(bytes);
    out.write(bytes, 1, 2);
    verify(sink).putByte((byte) 255);
    verify(sink).putBytes(bytes);
    verify(sink).putBytes(bytes, 1, 2);
  }

  public void testSerialization() {
    assertSame(

 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public interface ByteArrayDataOutput extends DataOutput {
  @Override
  void write(int b);

  @Override
  void write(byte b[]);

  @Override
  void write(byte b[], int off, int len);

  @Override
  void writeBoolean(boolean v);

  @Override
  void writeByte(int v);

  @Override
  void writeShort(int v);

    }

    @Override
    public Hasher putByte(byte b) {
      stream.write(b);
      return this;
    }

    @Override
    public Hasher putBytes(byte[] bytes, int off, int len) {
      stream.write(bytes, off, len);
      return this;
    }

    @Override
    public Hasher putBytes(ByteBuffer bytes) {
      stream.write(bytes);
      return this;
    }

    @Override

	for i := 0; i < b.N; i++ {
		rb.Write(data)
	}
}

func BenchmarkRingBuffer_AsyncWrite(b *testing.B) {
	rb := New(1024)
	data := []byte(strings.Repeat("a", 512))
	buf := make([]byte, 512)

	go func() {
		for {
			rb.Write(data)
		}
	}()

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		rb.Read(buf)
	}
}

func BenchmarkRingBuffer_AsyncWriteBlocking(b *testing.B) {
	const sz = 512

	dataUsageCacheVerV2      = 2
	dataUsageCacheVerV1      = 1
)

// serialize the contents of the cache.
func (d *dataUsageCache) serializeTo(dst io.Writer) error {
	// Add version and compress.
	_, err := dst.Write([]byte{dataUsageCacheVerCurrent})
	if err != nil {
		return err
	}
	enc, err := zstd.NewWriter(dst,
		zstd.WithEncoderLevel(zstd.SpeedFastest),
		zstd.WithWindowSize(1<<20),

        cos.write(new byte[] { 0, 1, 2, 3, 4 });
        assertFalse(cos.done);
        assertTrue(cos.isInMemory());
        cos.close();
        assertFalse(cos.done);
    }

    @Test
    public void inFile() throws IOException {
        ContentOutputStream cos = new ContentOutputStream(10, Curl.tmpDir);
        cos.write(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 });

        }
    }

    private void write(Path metadataPath, Metadata metadata) throws RepositoryException {
        try {
            Files.createDirectories(metadataPath.getParent());
            try (OutputStream output = Files.newOutputStream(metadataPath)) {
                new MetadataStaxWriter().write(output, metadata.getDelegate());
            }

        for ( String dialect : this.dialects ) {
            bos.write(0x02);
            try {
                bos.write(Strings.getASCIIBytes(dialect));
            }
            catch ( IOException e ) {
                throw new RuntimeCIFSException(e);
            }
            bos.write(0x0);
        }

        System.arraycopy(bos.toByteArray(), 0, dst, dstIndex, bos.size());

    initializeData(out);

    data = baos.toByteArray();
  }

  private void initializeData(DataOutputStream out) throws IOException {
    /* Write out various test values NORMALLY */
    out.write(new byte[] {-100, 100});
    out.writeBoolean(true);
    out.writeBoolean(false);
    out.writeByte(100);
    out.writeByte(-100);
    out.writeByte((byte) 200);
    out.writeChar('a');