Can I create custom coverage reports?

Yes, the skill covers advanced coverage settings and the implementation of custom coverage reporters for external service integration.

What are asymmetric matchers?

Asymmetric matchers allow you to verify specific parts of an object or array (like 'expect.any(Number)') without needing an exact match for the entire structure.

Does this skill support TypeScript?

Yes, it includes patterns for type-safe custom matchers and proper interface declarations for extending the Jest namespace.

How does this help with slow test suites?

It provides configurations for parallel execution, sharding tests across CI workers, and utilizing maxWorkers to optimize CPU usage.

Jest Advanced Testing

Name: Jest Advanced Testing
Author: TheBushidoCollective

byTheBushidoCollective

•

安全与测试

Implements sophisticated Jest testing patterns including custom matchers, parameterized tests, and advanced mocking strategies for complex JavaScript projects.

The Jest Advanced skill empowers Claude to handle complex testing scenarios beyond basic unit tests. It provides comprehensive patterns for creating domain-specific custom matchers, executing data-driven tests via parameterized templates, and fine-tuning coverage thresholds for mission-critical code. This skill is particularly useful for engineering teams looking to optimize test suite performance through sharding and parallelization while maintaining high-quality assertions using asymmetric matchers and advanced class mocking.

主要功能

01Test suite performance optimization including sharding, bailing, and parallel workers

02Custom synchronous and asynchronous matcher implementation with TypeScript support

03Advanced mocking techniques for ES6 classes and dynamic module factories

0495 GitHub stars

05Granular coverage configuration and custom reporter development

06Data-driven testing using test.each with arrays, objects, and template literals

使用场景

01Improving test readability by implementing domain-specific assertion libraries

02Scaling test suites for large monorepos through sharding and selective execution

03Validating complex data structures with asymmetric and nested object matchers

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add thebushidocollective/han jest-advanced

For use in Claude.ai and ChatGPT

Download Skill