Test with Jest: Learn Properly from Zerocho

Are you wondering whether you should automate testing your code? 🤔

You may be worried about whether you should set aside time to write software tests when you are busy with a lot of work. You may be worried because you often see articles on the Internet saying, “You must do tests” or “You must do TDD (Test-Driven Development).”

In this lecture, we will first tell you whether testing is necessary in the current situation, and show you the advantages of testing through code. This is not a lecture that forces you to "test!". After watching the lecture, if you feel the need for it yourself, try applying the testing you learned in the lecture!

Features of this course

📌 This lecture was not taken from the perspective that you absolutely must take the test. I hope you will watch the lecture and feel whether or not you need to take the test.

📌 Rather than simply introducing the test tool API, we will introduce what kind of mindset you should have when testing and how to do tests well. Among the many Jest APIs, we will explain the ones that are frequently used in practice.

📌 This is not a TDD course. This course teaches you how to add unit tests and integration tests to existing React or Express code. The goal is 100% test coverage.

📌 It is assumed that you have basic knowledge of JavaScript. Rather than a follow-along course, this is a lecture where you can feel the necessity by watching me conduct tests and learn about various mocking techniques.

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After class

• You will be able to set up Jest in your existing project (React, Express).

• You will be able to write unit tests and integration tests for existing projects (React, Express).

• With just a little bit of(?) effort, you can achieve 100% test coverage.

• This will help you decide which parts to mock.

Learn about these things

Things to note before taking the class