}

  /** Returns a byte string that differs from this one by one bit. */
  private fun ByteString.offByOneBit(): ByteString {
    return Buffer()
      .write(this, 0, size - 1)
      .writeByte(this[size - 1].toInt() xor 1)
      .readByteString()
  }

  private fun date(s: String): Date {
    return SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ").run {
      timeZone = TimeZone.getTimeZone("GMT")

    assertFailsWith<ConnectionShutdownException> {
      connection.newStream(headerEntries("b", "banana"), false)
    }
    val sink = stream.getSink().buffer()
    assertFailsWith<IOException> {
      sink.writeByte(0)
      sink.flush()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("stream finished")
    }
    assertFailsWith<IOException> {
      stream.getSource().read(Buffer(), 1)