const mongodb = {} mongodb.MongoClient = function () { this.connect = jest.fn() this.close = jest.fn() this.insertOne = jest.fn() this.find = jest.fn(() => ({ toArray: () => [] })) this.collection = jest.fn(() => ({ insertOne: this.insertOne, find: this.find, })) this.db = () => ({ collection: this.collection, }) } module.exports = mongodb