Using exposed prototypes in mongoist

db.js

const mongoist = require('mongoist');

module.exports = mongoist('test');

module.exports.Database = mongoist.Database;
module.exports.Collection = mongoist.Collection;
module.exports.Cursor = mongoist.Cursor;
module.exports.Bulk = mongoist.Bulk;

index.js

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

db.Collection.prototype.find = () => [{ bar: 'foo' }];

async function doDbStuff() {
    await db.a.insert({ foo: 'bar'});

    const res = await db.a.find();

    console.log(res);

    db.close();
}

doDbStuff();