Unit Testing

Test Legacy Code you own this product

This project is part of the liveProject series Unit Testing with Java, JUnit 5, and IntelliJ IDEA
prerequisites
intermediate Java • JUnit 5
skills learned
deriving tests from existing code • adding test coverage on an as-needed basis • using mutation testing results to guide test efforts
Max Guernsey, III
1 week · 10 hours per week · INTERMEDIATE
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Look inside
In this liveProject, you’ll set up tests to support refactoring of a legacy library. As you lack a written specification, you’ll use “pinning tests” to extract a specification from the existing code, and generate a wide range of test coverage. You’ll learn to spot when and where to improve code maintainability, and set up mutation testing to ensure your tests catch unintended changes.
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.

prerequisites

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 extract specification tests from an existing codebase.

  • Deriving tests from existing code
  • Adding test coverage on an as-needed basis
  • Using mutation testing results to guide test efforts

features

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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.

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  • Test Legacy Code project for free

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  • choose twelve free products per year
  • exclusive 50% discount on all purchases
  • Test Legacy Code project for free