// Test with binary data
        final byte[] binaryData = new byte[] { 0, 1, 2, 3, 127, (byte) 128, (byte) 255 };
        final String binaryEncoded = Base64Util.encode(binaryData);
        final byte[] binaryDecoded = Base64Util.decode(binaryEncoded);
        assertEquals("Binary data length should match", binaryData.length, binaryDecoded.length);
        for (int i = 0; i < binaryData.length; i++) {

        // Test with binary content
        byte[] binaryData = new byte[] { 0x00, 0x01, 0x02, (byte) 0xFF, (byte) 0xFE, (byte) 0xFD };

        ResponseData responseData = new ResponseData() {
            @Override
            public InputStream getResponseBody() {
                return new ByteArrayInputStream(binaryData);
            }

            @Override
            public String getUrl() {

      serverReader.processNextFrame()
    }
  }

  @Test fun clientSimpleBinary() {
    val bytes = binaryData(256)
    data.write("827E0100".decodeHex()).write(bytes)
    clientReader.processNextFrame()
    callback.assertBinaryMessage(bytes)
  }

  @Test fun clientTwoFrameBinary() {
    val bytes = binaryData(200)
    data.write("0264".decodeHex()).write(bytes, 0, 100)

        |  "active": true
        |}
        |'
        """.trimMargin(),
      )
  }

  @Test
  fun curlPostWithBinaryBody() {
    val binaryData = "00010203".decodeHex()
    val body = binaryData.toRequestBody("application/octet-stream".toMediaType())

    val request =
      Request
        .Builder()
        .url("https://api.example.com/upload")
        .post(body)