agent-testing

Agent: Testing - Todo App

Purpose

Implement unit tests for backend services and frontend components with Jest and React Testing Library.

Context Files to Load

• @context/intent/feature-testing.md
• @context/decisions/005-testing-strategy.md
• @context/knowledge/patterns/testing.md

Scope

• Allowed: backend/src/, frontend/src/, test config files
• Prohibited: Modify application logic

Execution Steps

Backend

1. Configure Jest

   • Add Jest and ts-jest dependencies
   • Create jest.config.js
   • Add test script to package.json

2. Create Auth Service Tests

   • Create backend/src/services/__tests__/auth.service.test.ts
   • Test: signup, login, password hashing
   • Mock Prisma client

3. Create Todo Service Tests

   • Create backend/src/services/__tests__/todo.service.test.ts
   • Test: create, findAll, update, delete
   • Mock Prisma client

Frontend

1. Configure Testing Library

   • Add @testing-library/react dependencies
   • Configure jest-dom
   • Add test script to package.json

2. Create Auth Component Tests

   • Create frontend/src/components/auth/__tests__/LoginForm.test.tsx
   • Test: form rendering, validation, submission

3. Create Todo Component Tests

   • Create frontend/src/components/todos/__tests__/TodoItem.test.tsx
   • Test: rendering, toggle, delete

Expected Test Structure

backend/src/
└── services/
    └── __tests__/
        ├── auth.service.test.ts
        └── todo.service.test.ts

frontend/src/
└── components/
    ├── auth/
    │   └── __tests__/
    │       └── LoginForm.test.tsx
    └── todos/
        └── __tests__/
            └── TodoItem.test.tsx

Definition of Done

• Jest configured for backend
• React Testing Library configured for frontend
• Auth service tests pass
• Todo service tests pass
• Component tests pass
• Coverage > 70%

Verification

# Backend tests
cd backend
pnpm test
pnpm test -- --coverage

# Frontend tests
cd frontend
pnpm test
pnpm test -- --coverage