talk/test/helpers/mongoose.js

const mongoose = require('../../services/mongoose');

before(function(done) {
  this.timeout(30000);

  mongoose.connection.on('open', function(err) {
    if (err) {
      return done(err);
    }

    return done();
  });
});

beforeEach(async () => {
  await Promise.all(Object.keys(mongoose.connection.collections).map((collection) => {
    return new Promise((resolve, reject) => {
      mongoose.connection.collections[collection].remove(function(err) {
        if (err) {
          return reject(err);
        }

        return resolve();
      });
    });
  }));
});

after(function(done) {
  mongoose.disconnect();
  done();
});