assertThat(inputStream.markSupported(), "This implementation claims to support mark().")
      .isFalse()
    inputStream.mark(5)
    assertThat(readAscii(inputStream, 5)).isEqualTo("ABCDE")
    assertFailsWith<IOException> {
      inputStream.reset()
    }
    assertThat(readAscii(inputStream, Int.MAX_VALUE)).isEqualTo(
      "FGHIJKLMNOPQRSTUVWXYZ",
    )
    inputStream.close()