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Getting Started Unit Testing with JUnit 5

JUnit 5 is the latest incarnation of the most popular Java unit test library. This course teaches you how to unit test Java code with JUnit 5.

Unit test frameworks like JUnit 5 help guide the design of your code as well as ensure that it works. In this course, Getting Started Unit Testing with JUnit 5, you'll get up to speed on the key skill of unit testing by leveraging the latest version of the popular JUnit unit test framework, JUnit 5. First, you'll learn how to validate your code with assertions and leverage JUnit 5 lifecycle methods. Next, you'll explore how to categorize tests, test exception handling, produce clear test reports, and many other JUnit 5 capabilities. Finally, you'll delve into two techniques critical to learn for unit testing - how to handle pre-existing untested code and how to drive development from a unit test. By the end of this course, you'll have the necessary knowledge to efficiently begin unit testing your own projects with JUnit 5.

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What's inside

Syllabus

Course Overview

Writing Your First Test

Writing More Complex Tests

Making Existing Code Testable

Writing Tests First

Expanding Your Knowledge

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Meant for learners ready to dive into unit testing in Java, it offers a sturdy foundation in this critical skill

Leverages the latest version of JUnit, version 5, keeping learners up to date with industry norms

Well-structured, with modules ranging from beginner-friendly topics like writing first tests to advanced techniques like driving development from a unit test

Useful for learners looking to develop a solid foundation in unit testing practices for Java applications

Taught by an experienced instructor, Jim Weaver, this course benefits from the expertise of a seasoned professional in the field

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Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Getting Started Unit Testing with JUnit 5 with these activities:

Review object-oriented programming (OOP)

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Review the fundamental principles of OOP to strengthen your understanding of Java's object-oriented features.

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Revise the concepts of classes, objects, and inheritance.
Practice creating and manipulating objects in a Java program.
Review polymorphism and its applications.

JUnit Concepts

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Review fundamental JUnit concepts to prepare for learning about JUnit 5.

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Read official JUnit documentation
Follow JUnit tutorial on YouTube
Practice writing basic JUnit test cases

JUnit Discussion Forum

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Engage with peers to discuss JUnit concepts, share experiences, and learn from others.

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Join an online forum or create a study group
Ask questions, share insights, and collaborate

Nine other activities

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Solve JUnit 5 coding challenges

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Engage in hands-on practice by solving coding challenges that focus on testing Java code with JUnit 5.

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Find online coding platforms or resources that offer JUnit 5 challenges.
Solve a series of JUnit 5 coding problems of varying difficulty levels.
Analyze the provided test cases and write corresponding JUnit 5 tests.
Debug and refine your test code to ensure it effectively validates the expected behavior.

JUnit Cheat Sheet

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Create a quick reference guide to frequently used JUnit 5 features and syntax.

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Summarize key concepts and methods
Create a concise document or presentation

Unit Testing Challenges

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Enhance your understanding by solving unit testing challenges.

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Solve Leetcode problems related to unit testing
Complete coding challenges on HackerRank

Develop a JUnit 5 testing framework for a sample project

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Apply your JUnit 5 knowledge by creating a custom testing framework for a sample project, reinforcing your understanding of its features and principles.

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Choose a small sample project to work with.
Design and implement a JUnit 5 testing framework tailored to the project's specific needs.
Write test cases that cover various scenarios and use JUnit 5 annotations.
Execute the test suite and analyze the results to ensure the framework effectively validates the project's functionality.

Advanced JUnit 5 Features

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Explore advanced capabilities of JUnit 5 to enhance your testing skills.

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Review documentation on JUnit 5 extensions
Follow tutorials on using JUnit 5 with Mockito
Build a project to apply advanced JUnit 5 features

Unit Testing Best Practices Project

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Demonstrate your understanding by applying best practices in unit testing.

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Develop a Java project with unit tests
Refactor code to improve testability
Follow industry-standard best practices

Mentor a junior developer in JUnit 5

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Deepen your understanding of JUnit 5 while supporting a junior developer by providing guidance, answering questions, and reviewing their code.

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Identify a junior developer who is interested in learning JUnit 5.
Set up regular mentoring sessions to provide support and guidance.
Review their code, provide feedback, and suggest improvements.
Discuss best practices, design patterns, and advanced JUnit 5 features.

JUnit Tutorial

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Create a comprehensive tutorial to share your knowledge and help others learn about JUnit 5.

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Write a step-by-step guide
Include code examples and explanations
Publish on a blog or platform

Contribute to the JUnit 5 open-source project

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Gain invaluable experience by contributing to the JUnit 5 open-source project, immersing yourself in its codebase and development process.

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Familiarize yourself with the JUnit 5 codebase and contribution guidelines.
Identify an area where you can make a meaningful contribution.
Fork the JUnit 5 repository and create a pull request with your changes.
Collaborate with the JUnit 5 development team to refine and merge your contribution.

Career center

Learners who complete Getting Started Unit Testing with JUnit 5 will develop knowledge and skills that may be useful to these careers:

Software Engineer in Test (SET)

Software Engineers in Test (SETs) are responsible for designing and implementing testing strategies for software products. JUnit 5 is a widely-used testing framework that can help SETs to write effective and maintainable tests. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data.

See salaries and explore the career path for Software Engineer in Test (SET)

Software Developer

JUnit 5 is a valuable tool for Software Developers as it provides a framework for writing and executing tests for Java applications. This course provides a thorough understanding of JUnit 5 and its features. By completing this course, you will gain the skills necessary to write effective tests that can identify and fix issues in your software.

See salaries and explore the career path for Software Developer

Quality Assurance (QA) Analyst

Quality Assurance (QA) Analysts are responsible for ensuring the quality of software products. JUnit 5 is a widely-used testing framework that can help QA Analysts to write comprehensive and effective tests. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data.

See salaries and explore the career path for Quality Assurance (QA) Analyst

Software Test Engineer

JUnit 5 is a powerful testing framework for Java applications. Software Test Engineers are responsible for ensuring that software meets quality standards and requirements. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data. By taking this course, you will gain the skills and knowledge necessary to effectively test Java applications and ensure their quality.

See salaries and explore the career path for Software Test Engineer

Test Automation Engineer

Test Automation Engineers are responsible for automating software testing processes. JUnit 5 is a powerful testing framework that can help Test Automation Engineers to create and execute automated tests. This course provides a deep dive into JUnit 5, covering topics such as writing tests, working with assertions, and using annotations.

See salaries and explore the career path for Test Automation Engineer

DevOps Engineer

JUnit 5 is a vital tool for DevOps Engineers as it provides a framework for writing and executing tests for Java applications. This course provides a thorough understanding of JUnit 5 and its features, including topics such as writing tests, working with assertions, and using annotations. By completing this course, you will gain the skills necessary to effectively test Java applications and ensure their quality.

See salaries and explore the career path for DevOps Engineer

Full-Stack Developer

Full Stack Developers are responsible for the entire software development lifecycle, from design to deployment. JUnit 5 is a valuable tool for Full Stack Developers as it provides a framework for writing and executing tests for Java applications. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data.

See salaries and explore the career path for Full-Stack Developer

Java Developer

JUnit 5 is a powerful testing framework for Java applications. Java Developers are responsible for developing and maintaining Java applications. This course provides a deep dive into JUnit 5, covering topics such as writing tests, working with assertions, and using annotations. By completing this course, you will gain the skills necessary to effectively test Java applications and ensure their quality.

See salaries and explore the career path for Java Developer

Technical Architect

JUnit 5 is a useful tool for Technical Architects as it provides a framework for writing and executing tests for Java applications. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data. By completing this course, you will gain the skills necessary to effectively test Java applications and ensure their quality.

See salaries and explore the career path for Technical Architect

IT Consultant

JUnit 5 is a valuable tool for IT Consultants as it provides a framework for writing and executing tests for Java applications. This course provides a thorough understanding of JUnit 5 and its features. By completing this course, you will gain the skills necessary to effectively test Java applications and ensure their quality.

See salaries and explore the career path for IT Consultant

Cloud Engineer

JUnit 5 is a valuable tool for Cloud Engineers as it provides a framework for writing and executing tests for Java applications deployed in the cloud. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data. By completing this course, you will gain the skills necessary to effectively test Java applications in the cloud and ensure their quality.

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Systems Analyst

JUnit 5 is a useful tool for Systems Analysts as it provides a framework for writing and executing tests for Java applications. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data. By completing this course, you will gain the skills necessary to effectively test Java applications and ensure their quality.

See salaries and explore the career path for Systems Analyst

Data Analyst

JUnit 5 is a useful tool for Data Analysts as it provides a framework for writing and executing tests for Java applications used in data analysis. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data. By completing this course, you will gain the skills necessary to effectively test Java applications used in data analysis and ensure their quality.

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Database Administrator

JUnit 5 is a useful tool for Database Administrators as it provides a framework for writing and executing tests for Java applications used in database management. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data. By completing this course, you will gain the skills necessary to effectively test Java applications used in database management and ensure their quality.

See salaries and explore the career path for Database Administrator

Business Analyst

JUnit 5 may be useful for Business Analysts as it provides a framework for writing and executing tests for Java applications used in business analysis. This course provides a comprehensive introduction to JUnit 5, covering topics such as writing tests, working with assertions, and managing test data. By completing this course, you will gain the skills necessary to effectively test Java applications used in business analysis and ensure their quality.

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Reading list

We've selected 12 books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Getting Started Unit Testing with JUnit 5.