Unit Testing

Requirements-Based Tests you own this product

This project is part of the liveProject series Unit Testing with Java, JUnit 5, and IntelliJ IDEA
intermediate Java • JUnit 5 • Mockito
skills learned
changing the design of existing code while supported by tests • changing test suites to take advantage of better designs
Max Guernsey, III
1 week · 10 hours per week · INTERMEDIATE

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liveProject This project is part of the liveProject series Unit Testing with Java, JUnit 5, and IntelliJ IDEA liveProjects give you the opportunity to learn new skills by completing real-world challenges in your local development environment. Solve practical problems, write working code, and analyze real data—with liveProject, you learn by doing. These self-paced projects also come with full liveBook access to select books for 90 days plus permanent access to other select Manning products. $19.99 $29.99 you save $10 (33%)
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Look inside
In this liveProject, you’ll explore writing high-quality, requirements-based tests against code with a solid design.You will take great care to ensure that each test focuses on a single, isolated behavior within the code. To that end, you’ll use techniques such as mocking to isolate requirements from one another for the purpose of testing. The output of the project is a codebase with a far more resilient test suite that will be able to stand the test of time.
This project is designed for learning purposes and is not a complete, production-ready application or solution.

book resources

When you start your liveProject, you get full access to the following books for 90 days.

project author

Max Guernsey, III

Max Guernsey has over twenty years of experience in software development and is currently a managing member at DevCraft LLC. He has worked on a wide range of products and technologies, including C++ class libraries, financial analysis applications, C# and Java backends, and even multi-platform video games. He is an experienced consultant and his "coaching from the keyboard" approach provides hands-on experience to learners in all aspects of modern software development.


This liveProject is for Java developers who want to increase their testing capabilities. To begin this liveProject you will need to be familiar with:

  • Intermediate Java
  • JUnit 5

you will learn

In this liveProject, you’ll learn to write high-quality tests to take account of new requirements for legacy code.

  • Changing the design of existing code while supported by tests
  • Changing test suites to take advantage of better designs


You choose the schedule and decide how much time to invest as you build your project.
Project roadmap
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While within the liveProject platform, get help from other participants and our expert mentors.
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book resources
Get full access to select books for 90 days. Permanent access to excerpts from Manning products are also included, as well as references to other resources.