Java Unit Testing is a critical skill for building reliable, maintainable, and professional Java applications. This course is designed to help developers move beyond basic testing knowledge and gain practical expertise in modern Java testing practices used in real-world development teams. It focuses on writing effective tests that improve code quality, reduce bugs, and support confident refactoring.

The course begins by establishing a strong testing mindset, explaining why unit testing matters, how it delivers long-term value, and how it fits into modern development workflows. Learners gain a clear understanding of JUnit 5, including test structure, assertions, lifecycle management, parameterised tests, and best practices for readable and maintainable test code. Emphasis is placed on writing tests that are fast, independent, and meaningful.

As the course progresses, learners explore Test-Driven Development (TDD), learning how to design clean code through tests using the red–green–refactor cycle. Mockito is introduced to help isolate units of code, mock dependencies, and verify interactions, enabling effective testing of complex business logic. These skills are essential for working with layered applications and services.

The course also covers code coverage using JaCoCo, teaching learners how to interpret reports, identify gaps, and avoid misleading metrics. In later stages, learners apply testing techniques to Spring Boot applications, including REST controllers, full-stack tests, security scenarios, and data-layer testing with JPA. This ensures learners can confidently test applications across all layers.

Upon completion, learners receive a free course completion certificate. For those who need formal recognition, multiple premium certificate and transcript options are available for purchase. Learners also benefit from 5-star rated support available 24/7 via email, ensuring expert help is always available throughout the learning journey.