Unit Testing

Generate Jest-based unit tests for JavaScript/TypeScript code. Creates test files following Jest conventions with proper mocking, describe blocks, and coverage.

Understand and suggest QA test cases based on code changes

Python single-file script development using uv and PEP 723 inline metadata. Prevents invalid patterns like [tool.uv.metadata]. Use when creating standalone Python utilities, converting scripts to uv format, managing script dependencies, implementing script testing, or establishing team standards for script development.

Agent Skill: TYPO3 extension testing (unit, functional, E2E, architecture, mutation). Use when setting up test infrastructure, writing tests, configuring PHPUnit, or CI/CD. By Netresearch.

Effector state management patterns and CRITICAL anti-patterns for ChainGraph frontend. Use when writing Effector stores, events, effects, samples, or any reactive state code. Contains anti-patterns to AVOID like $store.getState(). Covers domains, patronum utilities, global reset. Triggers: effector, store, createStore, createEvent, createEffect, sample, combine, attach, domain, $, useUnit, getState, anti-pattern, patronum.

Production-grade Go development patterns for building resilient services. Use when developing Go applications, implementing job schedulers, Docker integrations, LDAP clients, or needing patterns for resilience, testing, and performance optimization. By Netresearch.

Generate comprehensive unit tests with proper structure, mocking, and coverage. Use for general unit testing guidance across languages.

Expert QA engineer specializing in comprehensive quality assurance, test strategy, and quality metrics. Masters manual and automated testing, test planning, and quality processes with focus on delivering high-quality software through systematic testing.

Generate test scaffolding for modules with proper structure, fixtures, and mock configurations.

Test-driven development (TDD), unit/integration/UAT testing strategies, test organization, coverage requirements, and GenAI validation patterns. Use when writing tests, validating code, or ensuring quality.

Analyze test coverage with detailed metrics, identify gaps, and generate comprehensive reports. Use when measuring code coverage, finding untested code, or validating coverage thresholds.

Expert test automation engineer specializing in building robust test frameworks, CI/CD integration, and comprehensive test coverage. Masters multiple automation tools and frameworks with focus on maintainable, scalable, and efficient automated testing solutions.

Expert for Test-Driven Development (TDD) with NestJS and @lenne.tech/nest-server. Creates story tests in test/stories/, analyzes requirements, writes comprehensive tests, then uses nest-server-generator skill to implement features until all tests pass. Ensures high code quality and security compliance. Use in projects with @lenne.tech/nest-server in package.json dependencies (supports monorepos with projects/*, packages/*, apps/* structure).

Create comprehensive pull requests with detailed descriptions, test plans, and proper git workflow. Use when finalizing features to ensure high-quality PRs.

Expert refactoring specialist mastering safe code transformation techniques and design pattern application. Specializes in improving code structure, reducing complexity, and enhancing maintainability while preserving behavior with focus on systematic, test-driven refactoring.

Generate comprehensive API endpoint tests for REST and GraphQL APIs. Creates tests for all HTTP methods, status codes, authentication, and validation.

Implement features with code, tests, and documentation. Use when building features from approved designs following TDD and project coding standards.

Implement and test custom color schemes, themes, and visual variants for the emotive-mascot website and demos. Use when applying new color palettes, creating themed variants, or A/B testing visual designs.

Detect test smells, overmocking, flaky tests, and coverage issues. Analyze test effectiveness, maintainability, and reliability. Use when reviewing tests or improving test quality.

Use for test lifecycle hooks: beforeAll, afterAll, beforeEach, afterEach, fixtures, preload.