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Real-World TypeScript Unit Testing

Create unit tests for real world typescript system with few modules using vitest or jest

     
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Real-World TypeScript Unit Testing

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  • icon4.7 (10 reviews )
  • icon13 total hours
  • iconenglish
  • iconOnline - Self Paced
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  • iconUdemy

About Real-World TypeScript Unit Testing

You’re here because you know typescript and want to write better code with fewer bugs using unit tests.

I am here because I can help you accomplish your mission. I have B.s.c + M.s.c in mechanical engineering. I have been making software applications for over 20 years in the Hi-Tec industry and have much teaching experience. You can trust me and my teaching methods. I have learned many technologies in the past (check my LinkedIn profile), and I know exactly what is needed to learn and how.

In this course, I teach you everything you need about unit tests, and I use a real-world system, typescript, vitest, and jest.

The task of writing a unit test is not simple because there are many moving parts:

- Unit test of logic code

- Unit test of code with side effects like accessing the web

- Unit test of a module that uses another module

- Mocks

- Timers

- Unit test of UI

- Unit test of code that runs on the server

- Jsdom, testing library, react testing library

- Some tools like jest need a nontrivial setup to work with typescript and ES module

- New competitor to jest, e.g., vitest

- Coverage test

This ocean is very hard to swim without first learning it properly, and this is done in this course.

Learning in this course is not just video lessons; there are other important learning materials that most courses do not provide as a whole :

- Quiz after EVERY lesson

- Coding exercise at the end of EVERY coding section

- pdf file with all the lectures

- pdf file with a dictionary of all the material that I teach in this course

What You Will Learn?

  • Create unit tests for real world typescript client and or server applications using vitest or jest.
  • Write better typescript code with less bugs.
  • Ship code to production quickly and confidently.
  • Represent your system using advanced diagrams : block diagram ,UML sequence diagram and UML class diagram.
  • Write unit testing of pure logic code using test and expect.
  • Invoke test coverage tool like istanbul.
  • Write unit testing for code with side effect using spyOn , fn and mock.
  • Use advanced concepts for unit testing : refactoring , debugging , filtering.
  • Use isolated test and sociable test for unit test with module interaction.
  • Create unit testing involving real and fake timer such as in sinonjs/fake-timers.
  • Create unit testing for frontend vanilla UI using jsdom : document , querySelector.
  • Create unit testing for frontend vanilla UI using dom testing library : getByText , getByRole , waitFor.
  • Create unit testing for frontend react UI using react testing library : render , screen.
  • Use advanced typescript for better code : union , enum , type any and unknown , polymorphism using inheritance , class diagram.
  • Create unit tests using vitest and jest and compare between these tools.