Java Test-Driven Development with JUnit and Mockito

Writing software that works is good, but writing software that is easily maintainable and bug-free is the hallmark of a professional developer. Test-Driven Development (TDD) shifts your workflow to catch bugs before they even enter your codebase. This text-based course guides you through the core philosophy and practical application of TDD in Java. You will transition from writing untested code to designing robust, self-documenting software architectures using modern testing frameworks and mocking techniques. What you'll learn: - Understand the foundational concepts of TDD, including the Red-Green-Refactor cycle and essential testing terminology. - Write clean, readable unit tests using modern JUnit conventions and fluent assertions. - Isolate code under test by creating mocks, stubs, and spies with Mockito. - Configure parameterized tests to validate multiple scenarios with minimal code duplication. - Apply TDD principles to Spring applications for seamless integration testing. - Refactor legacy Java code safely under the protection of a robust test suite. The journey begins with essential testing terminology and the core philosophy of TDD before moving into step-by-step written explanations and code examples that demonstrate unit testing, mocking, and integration testing in real-world scenarios. This course is designed for Java developers who are new to testing or looking to adopt a test-first mindset. No prior testing experience is required, though a basic understanding of Java syntax is recommended. Start writing cleaner, more confident Java code today.