HomeCoursesUnit Testing Java Applications using JUnit 5

Intermediate

3h 30min

Updated 5 months ago

Unit Testing Java Applications using JUnit 5
Save

Gain insights into unit testing with JUnit 5. Learn about assertions, assumptions, nested and parameterized tests, advanced JUnit 5 concepts, and integrating tests with Maven and Gradle.

Join 2.7 million developers at

Overview

Content

Reviews

Unit Testing is a basic and essential skill to learn for any developer. In this course, you will learn what unit tests are, why they are important, and how to test your Java applications using the JUnit 5 Framework — the most popular unit testing framework in the market for Java developers. You will start with the fundamentals of Unit Testing and JUnit 5 and then gradually you will dive deep into the core concepts like assertions, assumptions, different types of tests like nested tests, parameterized tests, repeated tests, and more. You will also learn some advanced concepts of JUnit 5 like the JUnit 5 extension model, dependency injection, how to migrate existing unit tests from JUnit 4 to JUnit 5, and how to integrate your unit tests with Maven and Gradle.

Unit Testing is a basic and essential skill to learn for any developer. In this course, you will learn what unit tests are, why ...Show More

WHAT YOU'LL LEARN

Learn unit testing

Write unit tests using JUnit 5

Implement unit testing

Migrate JUnit4 tests to JUnit 5

Integrate JUnit 5 with Maven and Gradle

Learn advanced concepts of JUnit 5

Learn unit testing

TAKEAWAY SKILLS

Unit Testing

Content

42 Lessons3 Quizzes

Before We Begin

1 Lessons

Get familiar with unit testing Java applications using JUnit 5 and modern testing techniques.

What to Expect

Introduction to JUnit 5

5 Lessons

Look at JUnit 5 foundations, architecture, and creating your first unit test.

Introduction to Testing Pyramid and Unit Testing

Introduction to JUnit 5

JUnit 5 Architecture

Our First Unit Test with JUnit 5

Quiz Yourself on JUnit 5 Architecture

Junit 5 Core Concepts

11 Lessons

Explore JUnit 5 core testing concepts: AAA structure, assertions, assumptions, lifecycle, conditional execution, nested, tagged, repeated, and parameterized tests.

Structuring Tests Using the AAA Approach

Assertions

Assumptions

Understanding JUnit 5 Life Cycle

Conditional Execution

Quiz Yourself on JUnit5 Core Concepts

Dynamic Tests

1 Lessons

Grasp the fundamentals of creating and executing dynamic tests using @TestFactory in JUnit 5.

`TestFactory` Annotation

Dependency Injection in JUnit 5

3 Lessons

Dig into JUnit 5’s dependency injection features for enhanced test flexibility and reporting.

Using the TestInfoParameterResolver Class

Using the TestReporterParameterResovler Class

Using the RepetitionInfoParameterResolver Class

JUnit 5 Extensions

8 Lessons

Explore JUnit 5's flexible extension model, from post-processing and conditional execution to lifecycle callbacks and exception handling.

JUnit 5 Extension Model

Using the `TestInstancePostProcessor` Extension

Using the `ExecutionCondition` Extension

Using Life Cycle Callback Extensions

Using the ParameterResolver Extension

Using TestExecutionExceptionHandler Extension

Different Ways to Register Extensions

Quiz Yourself on JUnit 5 Extensions

Migrating from Junit 4 to Junit 5

2 Lessons

Approach migrating from JUnit 4 to JUnit 5, highlighting key differences and new rule support.

Difference between JUnit 4 and JUnit 5

Rule Support in JUnit 5

Appendix

7 Lessons

Step through setting up and running JUnit 5 tests with different tools and configurations.

IDE Support for JUnit 5

Setting up JUnit 5 with Maven

Setting up JUnit 5 with Gradle

Running JUnit5 Tests with Maven

Running JUnit5 Tests with Gradle

Running JUnit 4 Tests in Junit 5

Resources

BONUS: Useful Assertion Libraries

3 Lessons

Get started with assertion libraries like AssertJ, Hamcrest, and JSONAssert to enhance testing.

AssertJ

Hamcrest

JSONAssert

10.

Conclusion

1 Lessons

Examine further steps and resources to deepen expertise in unit testing.

What's Next?

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Course Author:

Sai Upadhyayula

Developed by MAANG Engineers

Every Educative resource is designed by our team of ex-MAANG software engineers and PhD computer science educators — subject matter experts who’ve shipped production code at scale and taught the theory behind it. The goal is to get you hands-on with the skills you need to stay ahead in today's constantly evolving tech landscape. No videos, no fluff — just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

Trusted by 2.7 million developers working at companies

"These are high-quality courses. Trust me. I own around 10 and the price is worth it for the content quality. EducativeInc came at the right time in my career. I'm understanding topics better than with any book or online video tutorial I've done. Truly made for developers. Thanks"

Anthony Walker

@_webarchitect_

"Just finished my first full #ML course: Machine learning for Software Engineers from Educative, Inc. ... Highly recommend!"

Evan Dunbar

ML Engineer

"You guys are the gold standard of crash-courses... Narrow enough that it doesn't need years of study or a full blown book to get the gist, but broad enough that an afternoon of Googling doesn't cut it."

Carlos Matias La Borde

Software Developer

"I spend my days and nights on Educative. It is indispensable. It is such a unique and reader-friendly site"

Souvik Kundu

Front-end Developer

"Your courses are simply awesome, the depth they go into and the breadth of coverage is so good that I don't have to refer to 10 different websites looking for interview topics and content."

Vinay Krishnaiah

Software Developer

"I've tried probably 5-7 different sites and Educative is easily the best. It perfectly blends explanation with interactivity"

Eric Downs

Musician/Entrepeneur

Hands-on Learning Powered by AI

See how Educative uses AI to make your learning more immersive than ever before.

Instant Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

AI Mock Interviews

Test your skills in a simulated interview setting. Receive personalized feedback based on your performance. Available for Coding Interviews, System Design, and more.

Adaptive Learning

At various checkpoints throughout Educative courses, you will be prompted to take a quick assessment. Receive a condensed curriculum tailored to your strengths and skill gaps.

Explain with AI

Select any text within any Educative course, and get an instant explanation — without ever leaving your browser.

AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

Free Resources

FOR TEAMS

Interested in this course for your business or team?

Unlock this course (and 1,000+ more) for your entire org with DevPath

Unit Testing Java Applications using JUnit 5 Save

Unit Testing Java Applications using JUnit 5
Save