mocha async setup example

mocha.js

var getApp = require('./main');

describe('App Tests', function () {
  
  var app;

  beforeEach(function (done) {
    getApp(function (err, a) {
      app = a;
      done(err);
    })
  });
  
  it('now has access to app', function () {
    app.should.be.ok;
  });
  
});

As simple as this is, it really helped me get the concept and apply it. Thank you!