Testing
Spring Boot's testing support is one of its strongest features. Between JUnit 5, Mockito, AssertJ, and a suite of purpose-built test slice annotations, you get a layered testing strategy that lets you write fast unit tests, focused slice tests, and full integration tests — all within the same project.
Testing
Unit tests are supposed to test one thing in isolation. The moment your UserService needs a live database connection, a real email server, or a third-party HTTP client, your "unit" test becomes an integration test — slow, brittle, and hard to run in CI. Mockito solves this by letting
Testing
Unit testing is non-negotiable in professional Java development. JUnit is the framework that makes it practical — and it has been the standard Java testing tool for over two decades. This tutorial walks you through everything you need to write, organize, and run JUnit tests, from the first dependency declaration to
Testing
Unit tests are the foundation of a healthy Java codebase. They run in milliseconds, catch regressions before they reach production, and give you the confidence to refactor without fear. But a test suite full of poorly written tests can be worse than no tests at all — it slows you down,
Testing
JUnit 5 is the current generation of the Java testing framework, released in 2017 and now the default choice for new projects. It replaces the monolithic JUnit 4 jar with a modular architecture, adds first-class support for parameterized tests, nested test classes, and dynamic test generation, and introduces a clean
Testing
Load testing tools have a reputation for being painful. JMeter XML files grow into unmaintainable tangles. Shell scripts with curl loops miss the statistical rigor you need. Gatling takes a different approach: express your load test as code, run it on the JVM, and get a polished HTML report when