Test with Jest: Learn Properly from Zerocho

With the arrival of the AI era, the skills required of developers are becoming increasingly complex. You might have thought, "I just need to be good at frontend," but when you try to create your own service or integrate AI features, you eventually hit a massive wall called the backend. However, as you try to start backend development, are you overwhelmed by how much there is to learn—from database design and authentication (Auth) to storage management and complex infrastructure setup? Now, you can lay down that heavy burden. In this course, we use Supabase, which solves all these backend functions at once. We will guide you through the fastest shortcut to becoming a full-stack developer who can "instantly" complete a backend without complex server knowledge and bring ideas to life immediately.

You will learn about what a node is, the latest JavaScript grammar, the node API, npm, the module system, databases, testing, and more. You will create a project using five practical examples. You will also deploy a service to the cloud and convert a node project to TypeScript.

In this lecture, we will practice developing programming thinking skills using JavaScript. Let's start with the web game, the multiplication table, and then create a word game, number baseball, a reaction speed test, tic-tac-toe, a lottery machine, rock-paper-scissors, a card matching game, a text RPG, a minesweeper, a 2048 game, and a mole catching game.

Let's learn NestJS, which is called the Spring of Node.js, and experience the convenience of Dependency Injection. Let's learn everything from API development, comparison with Express, deployment, and testing.

Let's use React and TypeScript together by adding TypeScript to a web game made with React and React Router, Redux, and MobX.

Learn Vue.js and Vuex and Vue Router, which are used with Vue, by creating 8 simple web games.

Learn React through web games. Get familiar with Classes and Hooks, and learn additional things like Context API, React Router, Webpack, and Babel.

We will develop a banking application using Spring Boot. This course will help you learn how to build an application by testing various problems that arise during development using JUnit.

Through this lecture, you will learn how to identify the overall types of front-end tests and how to write reliable tests by selecting the appropriate test for the situation.

Test code! For those who are at a loss as to where to start, here it is. From writing tests to deploying through automation, all in one place!

We will teach you everything from basic concepts to situational test writing methods and advanced testing knowledge so that you can master everything about front-end unit testing.

If you are a student or developer who is using or studying the Java programming language, you will learn various methods of testing your applications that you must know.

By developing a simple ReactNative app using the TDD methodology, you will learn the concepts of TDD and practice applying them to ReactNative mobile app development.

Are you hesitant about writing test code? Experience the A to Z of Spring environment testing through this lecture!

With this course, you will be able to write clean and clear test code, exactly as it is developed in practice. This lecture is for anyone curious about why test code is necessary and what constitutes good test code.

We provide CodeTree past questions, as well as algorithms and tips for solving them. We use C++, but since we don't use libraries, those who use other languages can also take the course. (Python code provided)

Software quality is a habit! This course will teach you how to become the best programmer that companies want.

This lecture explains unit testing, UI testing, and integration testing methods in Flutter based on the official documentation.

You will understand the present and future of AI technology, experience the testing process of AI models such as machine learning, and learn the role of a tester. You will gain a broad range of knowledge, from establishing AI-based system testing strategies to designing and executing test cases, as well as utilizing AI for test support. This course is based on the ISTQB AI Testing syllabus and provides an opportunity to perfectly prepare for the ISTQB AI Testing certification exam.

This course is for anyone who is curious about developing test automation on Android and iOS devices. This course will enable you to perform automated testing on mobile devices.

This is a job-oriented QA practical course for beginners preparing for QA employment, where you will complete test cases and checklists used directly in the field by designing and performing tests yourself using real service examples.

I always had the question, 'Why on earth do we need to do frontend testing?' And with that doubt in mind, I mechanically wrote tests. But you will learn 'why we write tests' and 'how to write them according to different situations'.

Even if you create the same function, the code of a junior developer who has just learned JavaScript syntax and that of an experienced senior developer will be quite different. Of course, even if the results are the same. The reason the latter's code is recognized is because of its well-designed structure and scalability to respond to changes. This lecture will learn about how to create such good code.

This course will help you gain more confidence in the code you develop by learning the basics of testing.