javascript - Jest 引用错误 'is not defined'

Question

我从不直接调用 WebSocket；它是 Asteroid 的依赖项。为什么 Jest 加载失败？

此外，这应该是一个默认的 create-react-app 测试，用于检查应用程序“呈现而不会崩溃”。但是应用程序加载正常，即使 Jest 测试表明它应该崩溃。

我的提交:https://github.com/Falieson/typescript-react-asteroid-meteor/commit/ab640bee540f1f2f5da2f0fe7b4be58f75b83d28#commitcomment-23644562

node scripts/test.js --env=jsdom --silent

输出:

 FAIL  src/routes/App.test.tsx
  ● Test suite failed to run

    ReferenceError: WebSocket is not defined

      at Asteroid.init (node_modules/asteroid/lib/base-mixins/ddp.js:46:67)
      at node_modules/asteroid/lib/asteroid.js:72:33
      at Array.forEach (native)
      at new Asteroid (node_modules/asteroid/lib/asteroid.js:70:16)
      at Object.<anonymous> (src/config/asteroid.ts:6:16)
      at Object.<anonymous> (src/routes/Login.tsx:14:18)
      at Object.<anonymous> (src/routes/App.tsx:19:15)
      at Object.<anonymous> (src/routes/App.test.tsx:5:13)
          at <anonymous>
      at process._tickCallback (internal/process/next_tick.js:188:7)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        1.915s

Answer 1

在我发现你可以像这样在构造函数中指定你想使用的 websocket 之前，我被 Asteroid 窃听了一段时间:

const asteroid = require('asteroid');
const WebSocket = require('ws');

const Connection = asteroid.createClass()

const portal = new Connection({
    endpoint: 'ws://localhost:3000/websocket',
    SocketConstructor: WebSocket // <-------------- HERE
})