Does it handle asynchronous code and API calls?

Absolutely. It features specific patterns for testing async functions, mocking fetch requests, and handling promise-based logic.

Can I use this to set up code coverage reporting?

Yes, the skill includes configuration patterns for tracking code coverage, setting thresholds, and integrating with CI/CD pipelines.

Which testing frameworks does this skill support?

The skill provides optimized patterns for Jest and Vitest, which are the industry standards for JavaScript and TypeScript testing.

Can this skill help with testing frontend components?

Yes, it includes patterns for Testing Library, making it ideal for testing React, Vue, and other modern frontend frameworks.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: kivilaid

bykivilaid

•

Security & Testing

Implement robust testing strategies for JavaScript and TypeScript applications using modern frameworks like Jest and Vitest.

About

This skill empowers Claude to architect and implement comprehensive testing suites for JavaScript and TypeScript projects. It provides domain-specific expertise in configuring testing environments, writing unit and integration tests for complex logic, and mastering advanced mocking patterns for external dependencies. Whether you are bootstrapping a new project's test infrastructure, implementing Test-Driven Development (TDD) workflows, or ensuring high code coverage in CI/CD pipelines, this skill provides the patterns and best practices needed to build reliable, production-grade software.

Key Features

Automated setup for Jest and Vitest testing environments
Test-driven development (TDD) and BDD implementation guidance
Advanced mocking patterns for modules, APIs, and dependencies
Comprehensive unit testing for functions, classes, and async logic
Dependency injection strategies for highly testable code architecture
6 GitHub stars

Use Cases

Bootstrapping test configurations and coverage thresholds for new TypeScript repositories
Refactoring legacy codebases by adding defensive unit and integration tests
Mocking complex third-party services like payment gateways or database connectors

About

Key Features

Automated setup for Jest and Vitest testing environments
Test-driven development (TDD) and BDD implementation guidance
Advanced mocking patterns for modules, APIs, and dependencies
Comprehensive unit testing for functions, classes, and async logic
Dependency injection strategies for highly testable code architecture
6 GitHub stars

Use Cases

Bootstrapping test configurations and coverage thresholds for new TypeScript repositories
Refactoring legacy codebases by adding defensive unit and integration tests
Mocking complex third-party services like payment gateways or database connectors