val server = serverListener.assertOpen()
    server.send("Hello, WebSockets!")
    clientListener.assertTextMessage("Hello, WebSockets!")
    closeWebSockets(webSocket, server)
  }

  @Test
  fun throwingOnOpenFailsImmediately() {
    webServer.enqueue(
      MockResponse
        .Builder()
        .webSocketUpgrade(serverListener)
        .build(),
    )
    val e = RuntimeException()