Individual skill

java-regression-test-generator

Automatically generate regression tests for Java codebases by analyzing changes between old and new code versions. Use when users need to: (1) Generate tests after refactoring or code changes, (2) Ensure previously tested behavior still works in new versions, (3) Cover modified or newly added code paths, (4) Migrate existing tests to work with updated APIs or signatures, (5) Maintain test coverage during code evolution. Supports JUnit and TestNG frameworks with unit tests, parameterized tests, and exception testing patterns.

skills/java-regression-test-generator/SKILL.md

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Last checked: Nov 6, 2026

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Repository stars (not skill ratings): 259
Repository last updated: Aug 21, 2026
License: Apache-2.0

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claude-skills Repository topic
metaprogramming Repository topic
software-development Repository topic
software-engineering Repository topic
claude Repository topic
claude-code Repository topic
testing Derived category

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SKILL.mdcore · 16,011 bytes
references/change_patterns.mddoc · 11,254 bytes
references/test_patterns.mddoc · 13,765 bytes

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# Java Regression Test Generator

Automatically generate regression tests for Java code based on version changes.

## Overview

This skill analyzes changes between old and new versions of Java code and generates regression tests that ensure previously tested behavior still works while covering new or modified functionality. It preserves correctness guarantees from existing tests and suggests updates when old tests become invalid.

## How to Use

Provide:
1. **Old version**: The previous version of Java code
2. **New version**: The updated version of Java code
3. **Existing tests**: Test classes or methods for the old version