(Last Updated: 10/2020)

https://www.udemy.com/course/unit-testing-typescript-nodejs/

Master unit testing with NodeJs, Typescript, Jest and React. Write top quality Typescript and NodeJs software with Jest

What you'll learn

Deep understanding of unit testing

Write, run, debug complex test suites

Test basic React components

Mock and stub complex Typescript classes

Node testing using Jest

Test REST APIs

Write tests for error handling

Integration tests for Node apps

Requirements

Basic knowledge of Typescript

Basic knowledge of NodeJs

Basic knowledge of React (for the React part)

Description

A must have skill for senior developers

Typescript is getting more and more popularity and it is a required skill for many IT jobs. It's key feature is type safety, thus preventing bugs.

But yes another skill is very important for any programming job: unit testing. Combining these two techniques will result in solid, robust and bug free code.

This course will go beyond the basics of unit testing and teach you all you need to write real world, complex testing suites for NodeJs and Typescript applications using the most popular javascript testing library: Jest.

Why unit testing NodeJs apps?

Unit testing usually adds a lot to a code base, two or tree times in some cases. This also means that a lot of time needs to be invested in writing and setting up tests. But all this effort pays of: time, effort and headache of fixing bugs can be used for more fun activities.

What you will get from this course:

setup NodeJs and Typescript projects from scratch

implement unit testing with Jest

learn about test configuration with parameters like: roots, transform, testRegex or verbose

learn about Jest test suites structure: describe with value, test, descriptions, hooks like beforeEach

basic and advanced assertions, comparing primitive types, objects or even errors

instantiating test double objects like mocks, stubs, spies or fakes.

write complex mock objects which can be used with "strange" javascript libraries.

inject doubles: directly inside the constructor, over the module or even using the objects prototype

learn about deep mocks and matchers to make your tests even better

integration tests for a NodeJs server application

Conditionally and asynchronously skip tests

Introduction on testing React components written in Typescript using react-testing-library

React User interaction with fire event and custom events

Assert react component values after asynchronous operations

The examples used in the course follow very high coding guidelines for Typescript, NodeJs and React. Async/await syntax is used for clear and concise code, and of course, you will see how to test asynchronous code, on server, but also in the front end.

Course advantages:

Respect for your time: most of the time of the instructor typing is cut off, the course is focused on explanations

Concise: learn only what you need, no fillers to make the course falsely more appealing

Experienced and programming active instructor: a great teacher never looses touch with the industry. This is especially true for software development, where the industry is so dynamic. This helps the instructor stay up to date with the best coding guidelines and present you the challenging parts, not the "hello world"

Organized course structure: six parts, progressive approach, consistent content

Code changes in each lecture on Git with code diffs: this will help you get an concise overview of the lecture and correct in case you missed something

Big font, dark background, fullDH content, this way it is readable even on a small screen or even tablet.

Who this course is for:

NodeJs or Typescript developpers willing to deeply understand unit testing

React developers who want to test their apps

Developers who want to write robust and clean code