Spring Boot Unit Testing with JUnit, Mockito, and MockMvc

High-quality software starts with reliable tests that ensure your code works exactly as intended under various conditions. This course provides a structured path to mastering the testing ecosystem within Spring Boot, moving from foundational concepts to complex web layer mocking and integration strategies. You will transform your development workflow by adopting a test-first mindset, allowing you to catch bugs early and refactor with confidence. Through detailed written explanations, you will learn how to isolate components, simulate web requests, and verify data persistence layers using industry-standard tools. What you'll learn: - Understand the fundamentals of Test-Driven Development (TDD) and the testing lifecycle. - Write effective unit tests using JUnit and modern assertion libraries like AssertJ. - Mock external dependencies and services using Mockito to isolate your application logic. - Test RESTful controllers and web layers efficiently with MockMvc and JsonPath. - Configure in-memory databases and integration testing environments for data layers. - Apply modern testing patterns including slice testing and basics of container-based testing for databases. The course begins with core testing terminology and setup before progressing through unit testing, mocking techniques, and full-stack integration scenarios. It is designed for developers who are familiar with Spring Boot basics and want to ensure their applications are production-ready through automated testing. Start writing cleaner, more maintainable code today through professional testing practices.