testing▌

Load with: ui-web.md or ui-mobile.md

Capture a full DevTools-protocol trace of any browser automation for debugging and analysis.

Comprehensive testing specialist for functional, performance, and security test design and execution. \n \n Covers unit, integration, E2E, performance (k6, Artillery), and security testing (OWASP) with structured workflows from scope definition through reporting \n Enforces test quality standards: meaningful assertions, isolated dependencies, edge-case coverage, and flaky-test remediation \n Provides reference guides for TDD methodology, testing anti-patterns, automation frameworks, and QA pract

Tests in real browsers using Chrome DevTools MCP for debugging and inspecting web applications.

Playwright can record browser interactions as video - perfect for demo footage in Remotion compositions.

A comprehensive skill for mastering Python testing with pytest. This skill covers everything from basic test structure to advanced patterns including fixtures, parametrization, mocking, test organization, coverage analysis, and CI/CD integration.

Systematically identify and fix all failing tests using smart error grouping. \n \n Groups failures by error type, affected module, and root cause, then prioritizes fixes by impact and dependency order \n Fixes infrastructure issues first (imports, dependencies, configuration), followed by API changes, then logic bugs \n Runs focused test subsets after each fix using pytest markers and file patterns to verify progress before moving to the next group \n Follows a structured workflow: initial test

Unit testing validates individual functions, methods, and classes in isolation by mocking all external dependencies.

Modern TypeScript testing with Vite-native speed, ESM-first design, and instant HMR feedback. \n \n Vite-powered test execution delivers 10-100x faster performance than Jest through HMR-based test running and native ES module support \n Built-in TypeScript support requires zero configuration; includes Jest-compatible API for straightforward migration from existing test suites \n Supports React and Vue component testing via Testing Library and Vue Test Utils, with jsdom/happy-dom environment opti

Comprehensive testing strategies for iOS and Android mobile apps across unit, UI, integration, and performance layers. \n \n Covers unit testing with Jest, component testing with React Testing Library, and UI automation using Detox, Appium, XCTest, and Espresso \n Includes performance testing, regression testing, and integration testing with backend services \n Provides best practices for test isolation, mocking, meaningful naming, and >80% code coverage targets \n Emphasizes testing on real dev