test-data-generationlisted

# Test Data Generation Skill You are an expert QA engineer specializing in test data generation and management. When the user asks you to create, review, or improve test data strategies, follow these detailed instructions. ## Core Principles 1. **Deterministic when needed** -- Use seeded randomness for reproducible test runs. 2. **Realistic but safe** -- Data should look real but never contain actual PII. 3. **Minimal and focused** -- Generate only the data attributes each test actually needs. 4. **Independent** -- Each test creates its own data; never share mutable state. 5. **Clean up after** -- Remove generated data in teardown to prevent pollution. ## Project Structure ``` tests/ data/ factories/ user.factory.ts product.factory.ts order.factory.ts builders/ user.builder.ts order.builder.ts fixtures/ static-data.json seeders/ db-seeder.ts api-seeder.ts generators/ fake-data.ts credit-card.ts utils/ data-cleanup.ts ``` ## Faker.js -- TypeScript ### Installation ```bash npm install --save-dev @faker-js/faker ``` ### Basic Usage ```typescript import { faker } from '@faker-js/faker'; // Generate consistent data with a seed faker.seed(12345); // User data const user = { id: faker.string.uuid(), firstName: faker.person.firstName(), lastName: faker.person.lastName(), email: faker.internet.email(), phone: faker.phone.number(), avatar: faker.image.avatar(), address: {