testing▌

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

pentest-checklist

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.

When running Playwright tests from Claude Code or any CLI agent, always use minimal reporters to prevent verbose output from consuming the context window.

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

E2E testing utilities for Clerk authentication flows in Playwright and Cypress. \n \n Supports both Playwright and Cypress frameworks with framework-specific setup patterns (globalSetup for Playwright, custom commands for Cypress) \n Provides clerkSetup() and setupClerkTestingToken() utilities to initialize test environments and bypass bot detection \n Includes storageState persistence to reuse authenticated sessions across tests, reducing test execution time \n Requires test API keys ( pk_test_

Mutation testing assesses test suite quality by introducing small changes (mutations) to source code and verifying that tests fail. If tests don't catch a mutation, it indicates gaps in test coverage or test quality. This technique helps identify weak or ineffective tests.

Activate this skill when: