Nodejs Express - unit testing/integration tests with Jest

Name: Nodejs Express - unit testing/integration tests with Jest
Rating: 4.6 (1658 reviews)

Learn to build a full CRUD REST API with Nodejs using TDD in Jest in JavaScript, with unit testing and integration test

Created byStefan Hyltoft

Last updated 11/2019

English

What you'll learn

Learn how to make unit tests
Learn how to make integration tests
Learn how to create a Express REST API from scratch
Learn how to build a Express REST API with test-driven development
Learn how to mock Mongoose models in Nodejs with Jest
Learn how to use Jest with TDD to build a REST API
Learn how to use MongoDB with Mongoose together with Jest tests
Learn how to write tests for error handling

Course content

9 sections • 62 lectures • 2h 47m total length

Initialising project1:18
Learn how to initialise our NodeJs Express test-driven development project with Jest
Hello World Express REST API in less than 5 mins!3:50
Learn how to create a simple Nodejs Express REST API in just 10 minutes!
CRUD Methods we are going to build the TDD-way in REST1:30
A brieft introduction to the various REST HTTP Methods we can use inside the Nodejs Express REST API.
Short intro to Jest + How to install Jest in our project0:39
How to install Jest to use with Nodejs Express for test-driven development

Our first test with Jest and Express REST API3:55
Making our first test with Jest for Nodejs Express REST API with test-driven development
Making our first test with Jest + Express REST API pass!1:16
Making our first test with Jest for Nodejs Express REST API with test-driven development PASS
Make Jest run automatically on file changes1:21
How to setup Jest to automatically run on file changes in our Nodejs Express app

Defining a data model for our Todo items with Mongoose3:27
Defining our Mongoose/MongoDB model to use with our Express REST API.
Using jest.fn to mock our Mongoose model functions4:04
How to use jest.fn() to mock functions in our Mongoose model to verify that our Express controller has called the model correctly
Making our test with Jest mock model pass1:40
Making our jest.fn() to mock functions in our Mongoose model to verify that our Express controller has called the model correctly
How to configure Jest test environment1:28
How to setup our Jest test environment correctly when using Mongoose inside Nodejs Express.
How to mock Request and Response objects in Express API3:22
How to use node-mocks-http package to verify that our Nodejs Express Request and Response objects have been used correctly
Writing test with mock Request object and making it pass!2:45
How to write a Jest test with node-mocks-http Request object with the Express controller and making the test pass
Using beforeEach in Jest tests1:17
Testing if response code is 201 and response is sent2:36
How can we test if the response status code is set correctly and that the response is actually being sent back in Nodejs Express with Jest?
Test if response is sending back JSON body4:47
How to test if JSON body is being sent back correctly in our Nodejs Express REST API with Jest

Creating our first integration test with Supertest and Jest6:35
How to make our Express app ready for integration testing1:49
Creating our Express Router3:15
How to debug tests in Jest2:08
Setting up Express JSON request body middleware1:00
Fix for address already in use error1:04
Making our controller function use async/await3:00
Setting up our MongoDB database in the cloud!2:03
Creating a MongoDB database user1:24
Connect to MongoDB database with Mongoose3:17
Modify our unit tests to use async/await3:29
Creating a server.js for running our Express REST API manually2:08
Manual Testing with Postman3:05

Requirements

Basic JavaScript ES6
Some familiarity with Nodejs Express is a plus

Description

Learn how to write a full CRUD REST API with Nodejs, Express and Jest using the test-driven development method!

TDD is becoming more and more of standard, and for good reasons!

With TDD, you can feel more safe and secure that any changes you make are not breaking existing functionality in your applications. Manual tests cannot be sustainable in large applications, or even medium applications. Plus, they're incredibly tedious.

Without TDD... well, you know the story. You try to add functionality while trying to touch the existing code as little as possible, because you don't want to break things unintentionally..

With TDD you won't be scared to make big refactors in your code to clean up messy code, you will know quickly if you've broken any existing functionality!

I'll show you step-by-step how to create a REST API with Express with unit tests and integration tests using the Jest test framework. There's going to be lots of opportunities for you to work on your own and do some exercises as well for optimal learning!

If you have any questions or suggestions to the course, feel free to message me anytime, I love interacting with my students!

Who this course is for:

Students somewhat familiar with Nodejs who wants to learn how to make production-ready software with TDD

Nodejs Express - unit testing/integration tests with Jest

What you'll learn

Explore related topics

Course content

Hello world Express And Jest in less than 10 minutes!4 lectures • 7min

Our first unit test with Jest3 lectures • 7min

Our first unit tests for HTTP POST /todos9 lectures • 25min

First integration test on HTTP POST /todos13 lectures • 34min

How to write error handling unit tests + integration tests8 lectures • 15min

HTTP GET on /todos route7 lectures • 20min

HTTP GET on /todos/:todoId8 lectures • 24min

HTTP PUT /todos - the TDD way6 lectures • 17min

HTTP DELETE4 lectures • 18min

Requirements

Description

Who this course is for: