🚀 Spring Boot #8 | Pruebas Unitarias con JUnit y Mockito | Paso a Paso

This time we'll tackle one of the most important and requested topics by students and developers: Unit Testing. If you've ever heard of JUnit, Mockito, Mock, verify, or assertEquals and haven't quite understood what they're for, this video is for you. The idea is to learn from scratch, first understanding the concepts and then implementing them step by step on a real Spring Boot project. ━━━━━━━━━━━━━━━━━━ 🎯 What will you learn in this video? ✅ What is a unit test? ✅ What are unit tests used for? ✅ What is JUnit 5? ✅ What is Mockito? ✅ What is a mock? ✅ What does @Mock do? ✅ What does @InjectMocks do? ✅ How to use `when` and `thenReturn`? ✅ How to use `assertEquals` ✅ How to use `assertThrows` ✅ How to use `verify` ✅ Best practices for writing tests ━━━━━━━━━━━━━━━━━━ 🚀 In this video, we'll build tests to: 📚 Create a book 📚 List books 📚 Search for a book by ID 📚 Delete a book 📚 Validate Successful scenarios 📚 Validating error scenarios All using Mockito to simulate dependencies and JUnit to validate the results. ━━━━━━━━━━━━━━━━━━ 💡 Why learn unit testing? Because a professional application shouldn't just work. It should also be: ✅ Reliable ✅ Maintainable ✅ Scalable ✅ Easy to modify Unit testing allows us to quickly detect errors and have confidence when making changes to our code. ━━━━━━━━━━━━━━━━━━ 📚 Technologies Used • Java • Spring Boot • JUnit 5 • Mockito • Maven • Lombok • REST APIs ━━━━━━━━━━━━━━━━━━ 🎯 Full Stack 1 Preparation This video is especially geared towards students preparing for assessments that require: ✅ REST API Development ✅ Spring Boot Services ✅ Unit Testing ✅ Development Best Practices ✅ Mockito and JUnit ━━━━━━━━━━━━━━━━━━ 🧠 Key Concept During this video, we'll see a very important difference: ✔ assertEquals → validates results ✔ verify → validates behaviors Understanding this difference often marks the point where Mockito finally starts to make sense for many students. ━━━━━━━━━━━━━━━━━━ ☕ Thanks for joining me. If you're learning Spring Boot, remember that consistent practice is the best way to master these concepts. See you in the next video where we'll continue advancing in the professional development of Java applications. #NotProfeJuan 🏷 HASHTAGS #NotProfeJuan #SpringBoot #JUnit #Mockito #UnitTesting #Java #Backend #Programming #SoftwareDevelopment #SpringFramework #JavaDeveloper #Testing #APIRest #Microservices #FullStack #LearnJava #LearnSpringBoot #SoftwareEngineering #CleanCode