Agent skill · software engineering · aiskillstore
backend-test-writer
Use when generating tests for backend code (Express routes, MongoDB models, Node services) - analyzes file type, detects test framework from package.json, generates comprehensive tests with setup/teardown and edge case coverage
Why this skill is useful
Adds executable scripts for generating comprehensive tests with setup/teardown and edge case coverage that aren't in public docs.
What it needs
Requires mongodb-memory-server, supertest installed locally. About 3k tokens when loaded. Last updated 2026-08-07. 405 stars on the source repository.
What this skill does
Backend Test Writer Generate comprehensive backend tests for MERN stack code. Analyzes file type, detects project conventions, produces tests that actually run. Philosophy: Smart defaults, zero config. Detect everything from project. <workflow> Workflow Copy and track progress: [ ] Phase 0: Infrastructure check [ ] Phase 1: Analyze target files [ ] Phase 2: Generate tests [ ] Phase 3: Report summary Phase 0: Infrastructure Check Before generating tests, verify setup: 1. Check package.json for test framework (Jest/Vitest/Mocha) 2. If none → prompt: "Set up Jest + Supertest?" 3. Check for mongodb-memory-server (needed for integration tests) 4. Detect test file convention (colocated vs tests/ vs tests/) Stop if: No test framework and user declines setup. Phase 1: Analyze Target Files Pattern Type Test Approach --------- ------ --------------- routes/, .routes.js Route Integration (Supertest + real DB) controllers/ Controller Integration services/ Service Unit (mocked deps) models/, .model.js Model Unit (validation tests) middleware/ Middleware Unit (mock req/res/next) utils/, helpers/ Utility Unit (pure functions) Override: User can specify --unit or --integration. Phase 2: Generate Tests Process files sequentially with progress. User can stop anytime. Each test includes: Proper imports for detected framework Setup/teardown (DB connection, cleanup) Comprehensive coverage: Success cases (happy path) Validation errors (400) Not found (404) Auth failures (401/403) if protected Edge cases (duplicates, empty, null) Reference: See test-patterns.md for complete code examples. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills aiskillstore/backend-test-writer