摩卡是否支持多个钩子前创建独立的 http 服务器?

Question

这是我的项目结构：

src/
- demo-1/
- server.ts
- server.spec.ts
- demo-2/
- server.ts
- server.spec.ts

每个server.spec.ts都有以下设置：

import { start } from './server';
let server: http.Server; 
before('start server', (done: Done) => {
server = start(done);
});
after('stop server', (done: Done) => {
server.close(done);
});
describe('test suites', () => {
//...
})

这是我的package.jsonscripts：

"scripts": {
"test": "NODE_ENV=test mocha --timeout=3000 --require=ts-node/register ./src/**/*.spec.ts"
},

当我运行npm test时，它给了我一个错误：

1) "before all" hook: start server:
Uncaught Error: listen EADDRINUSE :::4000
at Object._errnoException (util.js:1022:11)
at _exceptionWithHostPort (util.js:1044:20)
at Server.setupListenHandle [as _listen2] (net.js:1351:14)
at listenInCluster (net.js:1392:12)
at Server.listen (net.js:1476:7)
at Function.listen (node_modules/express/lib/application.js:618:24)
at Object.start (src/constructor-types/server.ts:33:14)
at Context.before (src/constructor-types/server.spec.ts:12:12)
at Server.app.listen (src/aliases/server.ts:42:7)
at emitListeningNT (net.js:1378:10)
at _combinedTickCallback (internal/process/next_tick.js:135:11)
at process._tickCallback (internal/process/next_tick.js:180:9)
2) "after all" hook: stop server:
Error: Not running
at Server.close (net.js:1604:12)
at emitCloseNT (net.js:1655:8)
at _combinedTickCallback (internal/process/next_tick.js:135:11)
at Immediate._tickCallback (internal/process/next_tick.js:180:9)

我希望每个server.spec.ts独立工作，这意味着启动服务器并逐个运行其测试套件，以避免 http 端口冲突。因为这些服务器具有相同的 http 端口。

Answer 1

Mocha 并行运行测试文件。服务器将同时创建到一个端口中。 解决方法是为每个文件分配随机端口(更改start函数以添加动态端口参数(

import { start } from './server';
const PORT = Math.floor((Math.random() * 100000) + 1);
let server: http.Server; 
before('start server', (done: Done) => {
// change start function accept port param
server = start(PORT, done);
});
after('stop server', (done: Done) => {
server.close(done);
});

另一种解决方案是支持运行测试同步的串行摩卡。但是包装很旧，我不知道它是否仍然有效