Does this skill support testing asynchronous code?

Yes, it includes specific patterns and best practices for testing async functions using async/await and handling promise resolutions or rejections in Jest.

Does it help with code coverage reports?

Yes, it includes configuration guides for generating coverage reports and setting global thresholds for branches, functions, and lines of code.

Can I use this for testing REST APIs?

Absolutely. The skill provides detailed implementation patterns for using Supertest alongside Jest to perform end-to-end API testing and validation.

Is mocking external modules supported?

Yes, the skill covers various mocking patterns including module-wide mocks, function spying, and even mocking system timers for time-dependent logic.

Node.js Jest Testing

Name: Node.js Jest Testing
Author: pluginagentmarketplace

bypluginagentmarketplace

•

Security & Testing

Implements comprehensive testing suites for Node.js applications using Jest, covering unit tests, mocking, and API integration.

About

This skill empowers Claude to architect and implement robust testing suites for Node.js applications using the Jest framework. It provides expert guidance on everything from basic unit testing and complex mocking patterns to full API integration testing with Supertest and automated CI/CD workflows. Whether you are looking to implement Test-Driven Development (TDD), achieve high code coverage, or mock external dependencies like databases and third-party APIs, this skill ensures your Node.js code is reliable, maintainable, and production-ready.

Key Features

CI/CD pipeline integration patterns for GitHub Actions
Automated code coverage reporting and quality threshold configuration
Advanced mocking for modules, functions, and timers using Jest
Unit and integration testing patterns for Node.js applications
REST API testing implementation using Supertest integration
1 GitHub stars

Use Cases

Implementing Test-Driven Development (TDD) for new Express.js services
Increasing code coverage and reliability for existing legacy Node.js modules
Isolating code during tests by mocking external API dependencies and databases

About

Key Features

CI/CD pipeline integration patterns for GitHub Actions
Automated code coverage reporting and quality threshold configuration
Advanced mocking for modules, functions, and timers using Jest
Unit and integration testing patterns for Node.js applications
REST API testing implementation using Supertest integration
1 GitHub stars

Use Cases

Implementing Test-Driven Development (TDD) for new Express.js services
Increasing code coverage and reliability for existing legacy Node.js modules
Isolating code during tests by mocking external API dependencies and databases