test-writer

Generate Jest and pytest unit, integration, and end-to-end tests with AAA structure and coverage checklists.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/AngelCantugr/fantastic-engine --skill test-writer-angelcantugr
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: test-writer
Source: https://github.com/AngelCantugr/fantastic-engine/tree/main/.claude/skills/test-writer
Command: npx skills add https://github.com/AngelCantugr/fantastic-engine --skill test-writer-angelcantugr

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires jest, vitest, mocha, jasmine, pytest, supertest.

What problem does it solve?

Writing effective unit, integration, and end-to-end tests can be challenging, leading to insufficient test coverage, brittle tests, and undetected bugs. This Skill helps you build robust test suites.

Core Features & Use Cases

  • Testing Philosophy: Guides you through the testing pyramid and the Arrange-Act-Assert (AAA) pattern.
  • Framework-Specific Templates: Provides code examples for popular frameworks like Jest (JavaScript) and pytest (Python).
  • Coverage Checklist: Helps ensure all scenarios are covered, including happy paths, edge cases, and error conditions.
  • Use Case: When developing a new feature, use this Skill to generate a comprehensive set of tests, including mocks for external dependencies, ensuring your code is reliable and bug-free.

Quick Start

Provide your code and ask: "Write unit tests for this JavaScript function using Jest."