Integration Testing

Fix the Persistence Layer you own this product

This project is part of the liveProject series API Integration Testing with Spring Framework
intermediate JUnit5 • intermediate Spring • beginner Maven • working knowledge of Java 11 • working knowledge of object-oriented programming
skills learned
use IntelliJ IDEA to write and execute tests • reproduce problems in hard-to-reach parts of a system with tests • use tests to drive bug fixes
Max Guernsey, III
1 week · 6-8 hours per week · INTERMEDIATE

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Look inside

You’re a Java developer for a large company that sells stock photography. You’re responsible for the service that ingests images, and a recent database change has broken the service, despite successful unit testing. Working in IntelliJ IDEA, you’ll build an integration test that replicates the problem, find the cause, fix the problem, and build the infrastructure to develop more integration tests in the future.

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 developers with a beginner-level understanding of Java and object-oriented design. To begin these liveProjects you’ll need to be familiar with the following:

  • JUnit5
  • Spring
  • Maven
  • Working knowledge of Java 11
  • Working knowledge of object-oriented programming

you will learn

In this liveProject, you’ll learn to build integration tests that go beyond the capabilities of unit tests for finding and preventing certain problems.

  • Use IntelliJ IDEA to write and execute tests
  • Reproduce problems in hard-to-reach parts of a system with tests
  • Use tests to drive bug fixes


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book resources
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  • Fix the Persistence Layer project for free