How does this skill improve test debugging?

It helps you move away from generic truthiness checks toward specific assertions and context-rich messages, resulting in clearer failure logs and better diffs.

Does it support creating custom assertions?

Absolutely. It provides templates for extending Jest with custom matchers and creating reusable assertion helpers in Python and Go.

Which testing frameworks does Assertion Helper support?

Assertion Helper provides specific patterns and best practice guidance for Jest, Vitest, Pytest (Python), and the standard testing library in Go.

Can it help with testing asynchronous code?

Yes, it includes specialized patterns for handling promise resolution, rejection, and async/await flows in JavaScript and Python.

Assertion Helper

Name: Assertion Helper
Author: cyperx84

bycyperx84

•

Security & Testing

Generates specific, context-rich test assertions and actionable error messages across multiple programming languages and frameworks.

Assertion Helper is a specialized skill for Claude Code designed to elevate the quality of software testing by guiding the creation of expressive and meaningful assertions. It provides domain-specific patterns for popular frameworks like Jest, Pytest, and Go, ensuring that tests not only verify correctness but also provide clear diagnostic information when they fail. By focusing on specificity, edge cases, and failure context, this skill helps developers write more maintainable test suites and reduces the time spent debugging mysterious test failures.

Key Features

01Specific assertion selection for equality, types, and async logic

02Edge case identification for boundaries, nulls, and empty values

03Context-aware error message generation for better debugging

04Custom matcher templates for specialized validation logic

05Multi-framework support for Jest, Vitest, Pytest, and Go

062 GitHub stars

Use Cases

01Debugging failing tests by adding detailed context and improved diffing logic

02Refactoring generic assertions into highly specific, readable tests

03Implementing comprehensive boundary and edge case testing for new features

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add cyperx84/claude-code-plugin-examples assertion-helper

For use in Claude.ai and ChatGPT

Download Skill