Introduction

UTgen is an automatic Java unit test case generation tool designed for Maven and Gradle projects. As a plugin of IntelliJ IDEA, UTgen provides unit test case generation support with out-of-the-box availability. It has the following key features:

• Users can right-click a method name, class name, class file, or package directory to generate a test case.
• A test case contains the input, method body, assertion, and comments.
• The tool ensures the maximum branch coverage and the minimum number of tests when generating test cases.
• Users can set a desired test case root directory and choose the JUnit 4 or JUnit 5 test framework.
• The tool supports two case rendering policies (retain and overwrite).
• The tool supports the mock technique and allows a test generation timeout interval.
• The tool supports projects developed using JDK 8, JDK 11, JDK 17, or JDK 21 (with IDEA 2023.1 and later versions supporting JDK 21).
• The tool supports Java projects developed using Spring Boot 2.x.