Unit Testing for Typescript & NodeJs Developers 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
Jest – the basics
Jest – the advanced parts
Advanced unit testing techniques using Jest
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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.
- Lifetime access
- 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!
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
- Developers who want to learn Jest
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