const updateOneSpy = sinon.spy(mongodb.Collection.prototype, 'insertOne'); const insertOneStub = sinon.stub(mongodb.Collection.prototype, 'insertOne').rejects(errorStub); const logErrorSpy = sinon.spy(Logger.prototype, 'error'); const insertOneStub = sinon.stub(mongodb.Db.prototype, 'collection').rejects(errorStub); const logErrorSpy = sinon.spy(Logger.prototype, 'error');