NodeJs Mocha Not Connecting to Database

Question

I am trying to create some unit tests with Mocha and Chai but I am unable to connect to the mysql server. Here I have my unit test:

process.env.NODE_ENV = 'test';

let chai = require('chai');
let chaiHttp = require('chai-http');
let server = require('../app');
let should = chai.should();

chai.use(chaiHttp);


describe('API endpoint /authenticate', function () {
  before((done) => {

    /* Todo: Clean up Database*/

    done()
  });


  it('should authenticate a user given CORRECT username/password', (done) => {

    let user = {
      username: 'ax850',
      password: 'test'
    };

    chai.request(server)
        .post('/api/authenticate')
        .send(user)
        .end((err, res) => {
          res.should.have.status(200);
          done();
        });

    done();
  });

});

As you can see, I am doing a POST request. Then in the script where I handle this POST request, I am connecting to a mySQL server like so:

 const db = require('./../../db_conn');

And in the db_conn I have:

const mysql = require('mysql');
const config = require('config.json')('./config.json');
let db;
const db_config = config.a_c.dbConfig;
function connectDatabase() {
  if (!db) {
    db = mysql.createConnection({
      host: db_config.host,
      user: db_config.user,
      port: db_config.port,
      database: process.env.NODE_ENV === 'test' ? db_config.db_test : db_config.db_dev,
      //database: db_config.db_dev,
      password: db_config.password
    });

    db.connect(function(err){
      if(!err) {
        console.log('Database is connected!');
      } else {
        console.log('Error connecting database!');
      }
    });
  }

  return db;
}

module.exports = connectDatabase();

However, when I run my test command: mocha --timeout 10000, it doesn't connect to the database. The mysql.createConnection runs unsuccessfully but doesn't give an error either. Any ideas? This works when I run the server without testing.

Answer 1

您在请求完成之前调用done。

   chai.request(server)
        .post('/api/authenticate')
        .send(user)
        .end((err, res) => {
          res.should.have.status(200);
          done();
        });
    // this is executed before chai.request is fulfilled
    done();