When is a test file considered too large and in need of splitting?

This skill recommends a high priority for splitting files exceeding 1200 lines, and a medium priority for those between 800 and 1200 lines to ensure readability.

How does this skill handle duplicate test detection?

It uses Grep and Bash tools to scan for identical describe/it blocks, similar assertion patterns, and redundant coverage to identify candidates for parameterization or merging.

Does this skill work with any specific testing framework?

While the guidelines are optimized for TypeScript and Jest/Vitest-like syntax, the core principles of fixture DRYing and logical organization apply to most modern testing frameworks.

What is the recommended approach for shared test data?

The skill promotes the Fixture Factory pattern, where shared data is extracted into a centralized directory (e.g., src/test/fixtures/) and uses override patterns for specific test cases.

Test Refactoring Expert

Name: Test Refactoring Expert
Author: tacogips

bytacogips

0•

Security & Testing

Optimizes and restructures test suites to improve maintainability, reduce duplication, and establish consistent testing patterns.

The Test Refactor skill is a specialized capability designed to clean up aging or disorganized test codebases. It provides a systematic framework for identifying redundant test cases, extracting shared fixtures into centralized factories, and standardizing assertion logic to reduce boilerplate. By enforcing file-size limits and providing clear strategies for splitting oversized test files, this skill helps developers transform brittle, repetitive tests into a modular, high-performance suite that is easier to navigate and maintain as the project scales.

Key Features

01Implements intelligent file splitting for test files exceeding 800-1200 lines

02Establishes a structured workflow for auditing, extracting, and cleaning test logic

030 GitHub stars

04Standardizes naming conventions for test files, blocks, and utility functions

05Extracts shared fixtures and mock objects into centralized factories and helpers

06Identifies and merges duplicate test bodies and redundant coverage patterns

Use Cases

01Restructuring a 'God' test file that has become too large and difficult to maintain

02Reducing code duplication in unit and integration tests by implementing the Factory pattern

03Standardizing testing patterns and assertion helpers across a large engineering team

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add tacogips/moltbook-cli test-refactor

For use in Claude.ai and ChatGPT

Download Skill