JUnit 5, Mockito, PowerMock, TDD, BDD & ATTD

JUnit 5, Mockito, PowerMock, TDD, BDD & ATTD – a comprehensive Udemy course by Andrii Piatakha that teaches modern Java testing techniques. Updated July 2026, this free‑coupon‑eligible course covers everything from JUnit 5 basics to behavior‑driven development, making it ideal for anyone searching for a free JUnit course, JUnit Udemy course, or learn testing online. Students finish with practical skills for unit, integration, and acceptance testing, plus a certificate that validates their expertise for interview preparation.

What You'll Learn

• Build robust unit tests using JUnit 5 (Jupiter) syntax and annotations.
• Master mock creation and verification with the Mockito API for isolated testing.
• Learn how PowerMock extends mocking capabilities for static, final, and private methods.
• Understand the differences between JUnit 5 and JUnit 4, and when to migrate.
• Create test‑driven development (TDD) cycles that drive clean Java code design.
• Implement behavior‑driven development (BDD) scenarios with readable specifications.
• Apply acceptance test‑driven development (ATDD) to align code with business requirements.
• Analyze test code coverage reports and improve overall quality metrics.

Course Details

• Instructor: Andrii Piatakha
• Rating: 4.4 stars (based on student reviews)
• Enrolled students: 1,246,621
• Language: English (en‑US)
• Certificate: Yes, upon completion
• Includes: Lifetime access, mobile‑friendly content, Q&A support from the instructor

What This Course Covers

JUnit 5 Fundamentals

• Core Jupiter annotations (@Test, @BeforeEach, @DisplayName)
• Parameterized tests and dynamic test generation
• Assertions library enhancements over JUnit 4
• Integration with IDEs and build tools for seamless execution

Mockito Mastery

• Creating mocks, spies, and stubs for Java interfaces and classes
• Argument matchers and verification modes (verify, times)
• Handling void methods and exceptions with doThrow/doAnswer
• Best practices for mock reset and avoiding over‑mocking

PowerMock & Advanced Mocking

• Mocking static methods, constructors, and final classes
• Using @PrepareForTest and @RunWith(PowerMockRunner.class)
• Combining PowerMock with Mockito for complex legacy codebases
• Limitations and when to prefer design refactoring over PowerMock

Testing Strategies: TDD, BDD, ATDD

• Red‑Green‑Refactor cycle for test‑first development
• Writing Gherkin‑style feature files for BDD with Cucumber integration
• Defining acceptance criteria and automating them with ATDD tools
• Real‑world case studies demonstrating each methodology

Test Execution & Coverage

• Running tests from Eclipse, IntelliJ, and command‑line Maven/Gradle
• Generating JaCoCo and Cobertura coverage reports
• Interpreting coverage metrics to identify untested code paths
• Continuous integration setup for automated test pipelines

Real‑World Projects & Practice

• End‑to‑end Java application with layered architecture tested throughout
• Interview‑style coding challenges focused on testing concepts
• Source code repository with ready‑to‑run examples for hands‑on learning
• Access to a free mobile app for on‑the‑go practice quizzes

Who Should Take This Course

• Junior Java developers who need a solid foundation in automated testing.
• Experienced Java engineers looking to upgrade from JUnit 4 to modern testing tools.
• Developers preparing for technical interviews that include testing questions.
• QA engineers transitioning to a developer‑centric testing mindset.
• Software architects who want to enforce testing standards across teams.

Prerequisites

• Basic proficiency in Java programming (syntax, OOP concepts, and Maven/Gradle basics).
• Familiarity with an IDE such as Eclipse or IntelliJ IDEA is helpful but not required.
• No prior experience with testing frameworks is needed — the course is beginner‑friendly.

Why Enroll in This Course

This Udemy offering delivers up‑to‑date Java testing knowledge without the usual price tag. A free coupon provides 100 % off for a limited time, making the course accessible to anyone eager to master testing in 2026. Compared with older Java courses, it focuses on current industry practices, real‑world examples, and continuous instructor support, ensuring you gain skills that translate directly to workplace success.

Course Highlights

• Lifetime access to all video lectures, source code, and updates.
• Self‑paced learning that lets you practice tests on your own schedule.
• Certificate of completion that can be added to LinkedIn or a résumé.
• Mobile‑friendly content and a dedicated free app for practice quizzes.
• Q&A support from Andrii Piatakha, a seasoned IT consultant.
• Real‑life project files that let you copy, run, and modify code instantly.

Frequently Asked Questions

Q: Is this course really free?
A: Yes, the course can be accessed for free when you apply the current Udemy coupon. The free enrollment includes all video lessons, source code, and the certificate, but the coupon is limited to a specific time window.

Q: What will I learn in this JUnit testing course?
A: You will learn how to write unit tests with JUnit 5, create mocks with Mockito, extend mocking using PowerMock, and apply TDD, BDD, and ATDD methodologies. The curriculum also covers test execution, coverage analysis, and real‑world project implementation.

Q: Do I get a certificate after completing this course?
A: Yes, Udemy provides a downloadable certificate of completion once you finish all lectures and pass the built‑in assessments. This certificate can be shared on professional networks to showcase your testing expertise.

Q: Is this course suitable for beginners?
A: Absolutely. The instructor starts with JUnit 5 fundamentals before moving to advanced topics, and no prior testing experience is required. Basic Java knowledge is the only prerequisite.

Q: How long do I have to enroll for free?
A: The free coupon is available for a limited period, typically a few weeks. Enroll before the coupon expires to lock in 100 % off and retain access to all course materials forever.

Final Thoughts

If you are a Java developer aiming to master modern testing frameworks and earn a recognized certification, JUnit 5, Mockito, PowerMock, TDD, BDD & ATTD by Andrii Piatakha offers a structured, up‑to‑date learning path. Grab the free coupon, start the lessons today