如何使用Typescript和Jest测试Websocket？

Question

我尝试过在Github上发帖，但到目前为止没有任何效果。我从Jest计时器中收到一些奇怪的错误，并且从Websocket中获得了一些未序列化的数据。我可以从我的套接字控制台记录消息，但是无法对其进行测试。我已经花了大约2天的时间来进行这项工作，而且我已经精疲力尽了。有任何想法吗？这是我的测试剩下的内容：

import { WebSocket as Socket, Server, CloseOptions } from "mock-socket";
import * as WebSocket from "ws";

let url: string;
url = "ws://localhost:8080";
const mockServer = new Server(url);

jest.useFakeTimers();

const msgs = <Array<WebSocket.Data>>[];

describe("Websockets", () => {
  beforeEach(done => {
    mockServer.on("connection", (socket: Socket) => {
      socket.send("message");
      done();
    });
  });

  afterEach(() => {
    let closer: CloseOptions;
    closer = {
      code: 0,
      reason: "disconnected",
      wasClean: true
    };
    mockServer.close(closer);
  });

  it("can communicate", done => {
    const ws = new WebSocket(url);
    ws.onmessage = async msg => {
      await msg;
      console.log(msg); // loggable
      msgs.push(msg.data); // not writable

      return msgs;
    };

    jest.runOnlyPendingTimers();
    expect(msgs.length).toBe(1);
    done();
  });
});