testing▌

Comprehensive testing strategies for JavaScript/TypeScript using Jest, Vitest, and Testing Library. \n \n Covers unit testing, integration testing, and component testing with patterns for pure functions, classes, async code, and React hooks \n Includes mocking strategies: module mocking, dependency injection, and spying on functions for isolated test execution \n Provides API and database integration test examples with real request/response handling and transaction cleanup \n Supports snapshot t

Comprehensive guide to building reliable, maintainable end-to-end test suites with Playwright and Cypress. \n \n Covers both Playwright and Cypress with setup, configuration, and framework-specific patterns including Page Object Model, fixtures, network mocking, and custom commands \n Addresses core E2E testing philosophy, the testing pyramid, and best practices for deterministic, independent tests using data attributes and user-behavior assertions \n Includes advanced patterns for visual regres

Comprehensive test planning and quality assurance documentation generator aligned with ISTQB and ISO 25010 standards. \n \n Generates three core deliverables: test strategy, test issues checklist, and QA plan from feature PRDs and technical breakdowns \n Applies ISTQB test design techniques (equivalence partitioning, boundary value analysis, decision table testing, state transition testing) and test types (functional, non-functional, structural, change-related) \n Maps all eight ISO 25010 qualit

AI-powered exploratory testing for web applications with autonomous issue discovery and verification. \n \n Autonomously explores web applications, discovers bugs, and verifies features through natural language test prompts; supports localhost testing without manual setup \n Run tests in parallel across different areas (authentication, accessibility, e-commerce flows) to maximize coverage while continuing other work \n Captures execution ID and browser URL in first 5 seconds, then continues runn

Automate form filling with Playwright MCP, including text input, date/time selection, and file uploads. \n \n Supports multiple form field types: text inputs, date pickers, time selectors, and file uploads \n Navigates to specified URLs and populates forms with provided data without automatic submission \n Includes review checkpoint before form submission to allow manual verification of filled fields \n

Comprehensive reference guide for writing, debugging, and maintaining Playwright tests across all testing types and scenarios. \n \n Covers 50+ testing patterns including E2E, component, API, GraphQL, visual regression, accessibility, security, mobile, and Electron app testing \n Includes activity-based lookup tables for writing new tests, debugging failures, fixing flaky tests, and infrastructure setup \n Provides decision trees for test type selection, architecture patterns (POM vs fixtures),

Property-based testing verifies that code satisfies general properties or invariants for a wide range of automatically generated inputs, rather than testing specific examples. This approach finds edge cases and bugs that example-based tests often miss.

dbt unit tests validate SQL modeling logic on static inputs before materializing in production. If any unit test for a model fails, dbt will not materialize that model.

Opinionated, production-tested Playwright guidance — every pattern includes when (and when not) to use it.

Design and execute reliable, cost-aware mobile testing across iOS and Android (native + cross-platform).