"Payload size must be less than or equal to 125",
      )
    }
  }

  @Test fun closeTooLongThrows() {
    assertFailsWith<IllegalArgumentException> {
      val longReason: ByteString = repeat('X', 124).encodeUtf8()
      serverWriter.writeClose(1000, longReason)
    }.also { expected ->
      assertThat(expected.message).isEqualTo(
        "Payload size must be less than or equal to 125",
      )
    }
  }