Foundations of Java Testing with JUnit & Mockito

Tired of finding bugs in your Java applications after they've been deployed? Writing automated tests is a core skill for any professional developer, ensuring your code is reliable, robust, and easy to maintain over time. This course provides a practical, text-based introduction to testing in Java. You will move from foundational testing concepts to writing effective unit tests for your own applications using modern tools. By the end, you'll have the confidence to apply testing principles to your projects, improve your code quality, and adopt professional development workflows. What you'll learn: - Understand the core principles of unit, integration, and end-to-end testing. - Write and organize structured test cases using the modern JUnit 5 framework. - Create powerful and readable assertions with AssertJ to verify your code's behavior. - Isolate components for focused testing by creating mock objects with Mockito. - Apply the Red-Green-Refactor cycle of Test-Driven Development (TDD) to guide your design. - Configure and run your tests automatically using build tools like Maven or Gradle. - Practice writing tests for a variety of common application scenarios. The course begins with key terminology and the fundamental theory behind software testing before moving into hands-on exercises with industry-standard libraries. Each concept is explained clearly, allowing you to build your skills progressively. This course is designed for Java developers who have a basic understanding of the language but no prior experience with automated testing. No previous testing knowledge is required to get started. Start building more resilient and professional Java applications today.