4.45 (106 reviews)
☑ 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
☑ Jest - the basics
☑ Jest - the advanced parts
☑ Advanced unit testing techniques using Jest
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.
Using Jest as an unit testing library provides many advantages:
Unitary unit testing library for running and structuring tests
Extensive mocking, stubbing and spying capabilities
Powerful matchers to create simple to read tests
Jest ships as one unitary NPM package
Jest is the default choice for TypeScript React projects
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 unit testing 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.
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
Use TypeScript and React for full-stack unit testing
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.
Respect for your time: most of the time of the instructor typing is cut off, the course is focused on unit tests and Jest 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, fullHD content, this way it is readable even on a small screen or even tablet.
Certificate of completion to present to your current or prospective employer
Do you want your Typescript or NodeJs code to have the best quality, and your project to be safe?
Enroll and start writing your tests in 10 minutes!
How to take this course
Unit testing discussion
Tools instalation: TypeScript and NodeJs
Tools installation: Visual Studio Code
Unit tests introduction
Working with test doubles
Test doubles discussion
Mock return values
Mocking promise rejections
Advanced testing use-cases
Testing launcher code
Testing Server code
Integration tests discussion
Integration tests setup
DataBase integration tests
Testing React apps
Simple app presentation
Testing visual elements
Testing user interaction
Testing async code
Debug and jest options
Project setup from scratch
Testing frameworks comparison
I love the instructors ability to make Jest so approachable and I value his teaching style. No copy and paste here, just good-clear instruction.
This was a really great course to learn the fundamentals of testing. There is a lot more to explore in these documents ,but the main takeaway. It doesn´t matter wich framework/s you use. After this course, you know how to test the right way. I really exited to write my own tests and see green success symbols :) Thank you a lot for this great course. This course is really worth to take. thank you to let us undertand how this works
Course is ok, there is a lot of unnecessary cuts that make it hard to follow along, and explanations are not very clear, but it does show some things about Jest.
SLOW DOWN Take a breath, maybe repeat yourself a bit. Explain what you are doing. Stop copy and pasting. Luckily I am only taking this course to brush up my testing skills. I'm sure if I were a complete beginner I would be completely lost. I think there is some good content in here, but it's hard to tell.
Straightforward lessons, no filling material, and the instructor touches also some advanced typescript testing techniques. Very good for me.
It's a beginner course on unit testing. Don't think it's worth ~ $100. If you can get it at a good discount, then take it.
I've wanted to start writing tests, but all the tutorials i found online we're partial, used different tools (and versions), configs mismatched... This course covers testing from setup, to a bunch of common problems/scenarios. I'm now more oriented in the subject and can explore deeper functionalities as I need them The only thing I miss in this course is about testing react components and the shallow rendering / mocking dilemma...
Alex is a very good instructor. He explains everything well and at a good pace. The source project provided is thorough and provides great examples of different types of testing techniques and TypeScript patterns. There's also lots of great bits of information regarding VSCode as an IDE and debugging node effectively.
I got a lot out of the course. It provides a lot of what is missing from other JS courses—most of them deliberately ignore testing. I've found that testing skills are somewhat lacking in the industry. I'd recommend this course to anyone working with Node, or other JS technologies.