Integration Testing with Spring Boot

Welcome to integration testing with Spring Boot! So far, you've learned about unit testing, which isolates small pieces of code.

Integration tests, on the other hand, verify that different components of your application work correctly together. This often involves multiple layers, like your web controller, service, and even the database.

• They test the 'glue' between components.
• They catch issues that unit tests might miss.
• They provide higher confidence in your application's behavior.

The cornerstone of integration testing in Spring Boot is the @SpringBootTest annotation.

When you use @SpringBootTest, it loads the full Spring application context. This means all your beans (components), configurations, and properties are initialized, just like when your application starts normally.

It's powerful, but also heavier and slower than unit tests because it brings up more of your application.