Unit Testing

Test infrastructure patterns - PGlite for in-memory PostgreSQL, Redis/S3 mocks, TestSetup factory, Vitest. Use when writing tests or adding test infrastructure.

Generate comprehensive test suites including static analysis, unit tests, integration tests, E2E tests, and coverage reports. Triggers: TG, test, 測試, 寫測試, coverage, 覆蓋率, pytest, unittest, 驗證.

Use proactively to ensure code quality through reviews and testing. This is particularly important after code generation or changes.

Expert guidance on unit testing for the Pomodoro Time Tracker. Activates when working with tests, test coverage, or testable code patterns.

Vitest + Storybook testing strategy with clear role separation.Reference for implementing unit tests and UI interaction tests.

JavaScript/TypeScript stack configuration - pnpm, prettier, eslint, vitest with 96% coverage threshold

Practice radical candor by delivering only verified, tested code with data-backed decisions, immediate problem flagging, and honest status communication. Use this skill when making claims about code behavior, reporting system status, identifying risks, documenting missing coverage, or challenging assumptions. Applies to all development activities requiring factual accuracy, evidence-based assertions, gap ownership, and closing the loop on delivered work through validation and independent review.

テスト品質レビュー - テストの意味、カバレッジ、モック適切性、テスタビリティを評価

Agent orchestration patterns for the Pomodoro Time Tracker. Activates for multi-agent tasks, test failures, or complex implementations.

Browser automation using Puppeteer or Playwright. Use for web testing, screenshots, form filling, and automated browser interactions.

Python coding standards, conventions, and best practices. Use when writing, reviewing, or testing Python code.

Workflows for the Loopwish Go backend (Gin): run locally, add/modify REST endpoints, and validate with go test/build and golangci-lint.

Use when developing tests or refactoring test suites - run tests in watch mode with focused file patterns to get instant feedback on specific test files without running the entire suite

Supabase test harness patterns including local Supabase setup, test user creation via Auth Admin API, RLS testing, migration testing (db_reset), seed sequences, rate limiting, and environment detection. Use when setting up Supabase testing infrastructure, creating test users, troubleshooting Supabase test failures, or implementing RLS validation. Triggers on: supabase test setup, test user creation, supabase local testing, RLS testing, migration testing, supabase test harness, auth test helpers.

Gate 6 - Verify tests exist and cover critical paths. Issues result in WARNINGS (encourages tests, doesn't block).

Generate behavioral unit tests from functional specifications using PreDB/PostDB pattern. Use when user provides specs with Preconditions/Workflow/Postconditions structure or asks to write tests for a specification before implementation (TDD approach).

C++ development guidelines for modern C++17/20 projects. Use when creating C++ classes, functions, headers, or working with CMake, templates, smart pointers, RAII, memory management, STL containers, multithreading, or C++ best practices. Covers project structure, modern C++ idioms, build systems, testing with GoogleTest/Catch2, and performance considerations.

Use when user asks to commit changes or when finishing significant work. Enforces quality gates, testing verification, and explicit user approval before any git commit.

Use when encountering any bug, test failure, or unexpected behavior. Always find root cause before attempting fixes. Evidence before assertions.

Systematic error fixing workflow for Dashboard Link SaaS. Use when user says "fix all errors", "resolve errors", "fix the build", "make it work", "troubleshoot", or when encountering TypeScript errors, lint errors, build failures, test failures, or runtime errors. Provides step-by-step debugging and resolution strategies.