Mongoose open connection issue with Supertest

In your Mocha tests add a before function to connect to MongoDB like so

var mongoose = require('mongoose');describe('My test', function() {    before(function(done) {       if (mongoose.connection.db) return done();       mongoose.connect('mongodb://localhost/puan_test', done);    });});

Ok - was pretty close. What I had to do was remove the describe method call and place a before() call in a common file to all tests - supertest or just straight mocha unit tests.

var db;// Once before all tests - Supertest will have a connection from the app already while others may notbefore(function(done) {  if (mongoose.connection.db) {    db = mongoose.connection;    return done();  }  db = mongoose.connect(config.db, done);});// and if I wanted to load fixtures before each testbeforeEach(function (done) {  fixtures.load(data, db, function(err) {    if (err) throw (err);    done();  })});

By omitting the describe() call the above it makes it available to all tests.

// Also you can use the 'open' event to call the 'done' callback// inside the 'before' Mocha hook.    before((done) => {        mongoose.connect('mongodb://localhost/test_db');        mongoose.connection            .once('open', () => {                done();            })            .on('error', (err) => {                console.warn('Problem connecting to mongo: ', error);                done();            });    });