错误：连接ECONNREFUSED 127.0.0.1:3100

Question

I am new to node.I get the error that is Error: connect ECONNREFUSED 127.0.0.1:3100 , when I run npm test.

This is my test file.

Test.ts

import * as chai from 'chai';
let chaiHttp = require('chai-http');
import * as assert from 'assertthat';
import * as request from "superagent";
chai.use(chaiHttp);
const expect = chai.expect;
describe('Checking whether the response return status 200', function() {
it('Status OK', function(done) {
return chai.request('https://localhost:3100') 
.get('/hello')
.end(function(err, res){
    if(err){
        done(err);
    }
    else{
        expect(res.body.message).to.equal('hello world');
        done();
    }
});
});
});

This is my app file

app.ts

import * as express from 'express';
import {Request,Response} from 'express';
const app: express.Express = express();

app.get('/hello',(req:Request,res:Response)=>{
    res.json({
        message:"hello world"
    });
});
app.listen(3100,() =>{
    console.log("server listening");
});
export default app;

Answer 1

Your server is not running while trying to test GET /hello route which is why it fails to connect.

See here an example on how you should test your API's server routes.

Within your test.ts file, you should import your server and make sure it listen before tests and close after tests.

import server from 'app.ts';
import * as chai from 'chai';
import * as assert from 'assertthat';
import * as request from 'superagent';

const chaiHttp = require('chai-http');
const expect = chai.expect;

chai.use(chaiHttp);

describe('Checking whether the response return status 200', function() {
    it('Status OK', async function(done) {
        const { res, err } = await chai.request(server).get('/hello');
        expect(res.body.message).to.equal('hello world');
    });
});