#NODEJS REST API HOW TO#
#NODEJS REST API INSTALL#

To overcome the above problems we have to create what is known as Stubs.īy definitions, a stub in software development is a piece of code used to stand in for some other programming functionality Interacting with actual database takes time, which makes running tests a time-consuming operation, which should not be the case ideally.With a database as a dependency, our tests require an internet connection to work, hence they cannot run in isolation.

We might require to clean the database between 2 consecutive tests, hence if by mistake the connection is made to a production database due to some human error, our tests might end up deleting production data.

The problem exists because there is already a user in our DB now, which has the profileId that we have provided, and since we have a check-in place that validates the existence of the provided profileId, that check fails, hence our entire test fails.Īlong with this, there are other problems that we face, when we run tests on the actual database. So the user model look something like this Now for the sake of simplicity, we’ll be creating 2 APIs, one to add a user to our MongoDB database and the other to fetch a user through a unique profileId. |-index.js |-src |-models | |-services | |-test Now we have to reproduce the following project structure in our directory.

#NODEJS REST API INSTALL#

Install the following dependencies npm install chai cors express mocha mongoose sinon So the first step is to create an empty directory mkdir node-api We’ll start by setting up our node js project. The source code for the entire project can be found here Project Setup We’ll be using chai mocha and sinon for writing our unit tests.

#NODEJS REST API HOW TO#

So in this article, I will teach you how to write unit tests for an actual but simple Node.js API, performing CRUD operations on MongoDB.

Either people try to explain how to write unit tests for a simple addition function, or we see them written in very complicated projects. In this way, unit tests help in boosting a developer’s productivity.īut the problem with understanding the process of unit tests is, that most of the content related to it, either is too simple or is too complex. If a piece of code has well-written unit tests in place, then if we have to make any changes to it, we can do so without doing complete end-to-end testing of the entire feature from scratch. Although writing unit tests sometimes feels like a redundant process, the actual use of these tests comes into the picture while making changes to the piece of code later. Unit tests form an integral part of a developer’s development lifecycle. Photo by battlecreekcoffeeroasters on Unsplash

Nodejs rest api