javascript - Ensuring server app runs before mocha tests start -

this similar ensuring express app running before each mocha test , specified solution still isnt working + i'm using websocket server

in short , i'm using websocket framework called socketcluster , server file

import {socketcluster} 'socketcluster';  const socketcluster = new socketcluster({   workers:1,   brokers:1,   port: 3000,   appname:null,   initcontroller: __dirname + '/init.js',   workercontroller: __dirname + '/worker.js',   brokercontroller: __dirname + '/broker.js',   socketchannellimit: 1000,   crashworkeronerror: true })  export default socketcluster 

running node server.js starts worker process specified in worker.js

export const run = (worker) => {   console.log(' >> worker pid: ',process.pid);    const app = express();    const httpserver = worker.httpserver;   const scserver = worker.scserver;    app.use(cookieparser())    httpserver.on('request', app);    app.get('/',(req,res) => {     console.log('recieved')     res.send('hello world')   })  } 

i want test server , tests finishing (and failing) way before server starts. there way can force server load before going ahead tests? have far

describe('express server',() =>{    beforeeach((done) => {     require('../../server/server')     done()   })    it('should return "hello world"',(done) => {     http.get('http://127.0.0.1:3000',(res) => {       expect(res).to.contain('wtf world')       done()     })   }) }) 

the above doesnt seem work. server doesnt load in before block despite providing done() call well.

edit - i've tried splitting server.js file invoke different server based on how imported.

const main = () => {   console.log('main server')   new socketcluster({     workers:1,     brokers:1,     port: 3000,     appname:null,     initcontroller: __dirname + '/init.js',     workercontroller: __dirname + '/worker.js',     brokercontroller: __dirname + '/broker.js',     socketchannellimit: 1000,     crashworkeronerror: true   }) }  export const test = (port,done) => {   console.log('testing server')   new socketcluster({     workers:1,     brokers:1,     port: port,     appname:null,     initcontroller: __dirname + '/init.js',     workercontroller: __dirname + '/worker.js',     brokercontroller: __dirname + '/broker.js',     socketchannellimit: 1000,     crashworkeronerror: true   })   done() }  if (require.main === module){   main() } 

and in test.js , - still doesnt seem work though

import {expect} 'chai'; import {test} '../../server/server'   describe('express server',() =>{    before(function(done){     test(3000,done)   })    it('should return "hello world"',(done) => {     http.get('http://127.0.0.1:3000',(res) => {       expect(res).to.contain('world')       done()     })   }) }) 

edit:2 - trie way returning promise server.js file. still doesnt work

export const test = (port) => {   console.log('testing server')   return promise.resolve(new socketcluster({         workers:1,         brokers:1,         port: port,         appname:null,         initcontroller: __dirname + '/init.js',         workercontroller: __dirname + '/worker.js',         brokercontroller: __dirname + '/broker.js',         socketchannellimit: 1000,         crashworkeronerror: true       }))   } 

and in before hook

 before(function(done,port){     test(3000).then(function(){       console.log('arguments: ',arguments)       done()     })   }) 

your server module doesn't have callback, not ready when call done() in beforeeach method.

first, export app in server module.

then, like:

const app = require('../../server/server').app; let server;   before(done => {   server = app.listen(3000, done); });  /**     ...    tests here    ... **/  /** and, if need close server after test **/  after(done => {   server.close(done); }); 

this way, done() called in listen callback, in tests server listening correctly. then, remember close after tests end (useful if server required in 1 or more test suites).