dropCollections.js

// Drops all mongo collections associated with a test Database before running any tests.

process.env.NODE_ENV = 'test';

import mongoose from 'mongoose';
import settings from '../../src/config/settings';

before(async function(){
  const dropCollection = (name) => {
    return new Promise(function(resolve, reject){
      mongoose.connection.collections[name].drop(function(err){
        resolve();
      });
    });
  }

  const collectionNames = Object.keys(mongoose.connection.collections);
  let currentCollection;

  for (let i = 0; i < collectionNames.length; i++) {
    currentCollection = collectionNames[i];
    await dropCollection(currentCollection);
  }
});