byte[] tenBytes = new byte[10];
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, -1, 1));
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, 1, -1));
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, 9, 2));
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, 9, 100));
  }

    byte[] tenBytes = new byte[10];
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, -1, 1));
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, 1, -1));
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, 9, 2));
    assertThrows(IndexOutOfBoundsException.class, () -> nos.write(tenBytes, 9, 100));
  }

   * malformed.
   */
  @Throws(IOException::class)
  fun checkLowercase(name: ByteString): ByteString {
    for (i in 0 until name.size) {
      if (name[i] in 'A'.code.toByte()..'Z'.code.toByte()) {
        throw IOException("PROTOCOL_ERROR response malformed: mixed case name: ${name.utf8()}")
      }
    }
    return name
  }

        try (final BufferedInputStream bis = new BufferedInputStream(responseData.getResponseBody())) {
            final byte[] bomBytes = new byte[UTF8_BOM_SIZE];
            bis.mark(UTF8_BOM_SIZE);
            final int size = bis.read(bomBytes);
            if (size < 3 || !isUtf8BomBytes(bomBytes)) {
                bis.reset();
            }
            final InputSource is = new InputSource(bis);

    val request = Request.Builder().url(server.url("/b")).build()
    val response = client.newCall(request).execute()
    val bodySource = response.body.source()
    assertThat(bodySource.readByte()).isEqualTo('d'.code.toByte())

    // The second byte of this request will be delayed by 750ms so we should time out after 250ms.
    val startNanos = System.nanoTime()
    bodySource.use {
      assertFailsWith<IOException> {