client.webSocket!!.close(0, null)
    }.also { expected ->
      assertThat("Code must be in range [1000,5000): 0")
        .isEqualTo(expected.message)
    }
  }

  @Test
  fun afterSocketClosedPingFailsWebSocket() {
    client2Server.source.close()
    client.webSocket!!.pong("Ping!".encodeUtf8())
    taskFaker.runTasks()
    client.listener.assertFailure(IOException::class.java, "source is closed")