* removed in one segment while checking another, in which case the table was never actually
     * empty at any point. (The sum ensures accuracy up through at least 1<<31 per-segment
     * modifications before recheck.) Method containsValue() uses similar constructions for
     * stability checks.
     */
    long sum = 0L;

    assertThat(source.readByte()).isEqualTo('B'.code.toByte())
    assertThat(source.readByte()).isEqualTo('C'.code.toByte())
    assertFailsWith<SocketTimeoutException> {
      source.readByte() // If Content-Length was accurate, this would return -1 immediately.
    }
    source.close()
  }

  /** Confirm that an unacknowledged write times out.  */
  @Test
  fun writeTimeouts() {
    val server = MockWebServer()