Test Infrastructure Skill

Purpose

This skill provides test infrastructure conventions for creating reusable testing foundations including factories, MSW handlers, mock data, and Page Object Model classes.

Activation

This skill activates when:

• Creating or modifying files in tests/fixtures/
• Creating or modifying files in tests/mocks/
• Creating or modifying files in tests/helpers/
• Creating or modifying Page Objects in tests/e2e/pages/
• Creating or modifying E2E helpers in tests/e2e/helpers/

File Patterns

• tests/fixtures/**/*.factory.ts
• tests/mocks/**/*.handlers.ts
• tests/mocks/**/*.mock.ts
• tests/mocks/data/**/*.mock.ts
• tests/e2e/pages/**/*.page.ts
• tests/e2e/helpers/**/*.ts
• tests/helpers/**/*.ts

Workflow

1. Detect infrastructure work (file path matches patterns above)
2. Load references/Test-Infrastructure-Conventions.md
3. Also load testing-base skill for shared conventions
4. Apply infrastructure patterns for the specific type
5. Ensure consistent naming and export patterns

Key Patterns (REQUIRED)

Factories

• Async functions returning database entities
• Accept overrides parameter for customization
• Generate unique IDs using timestamps
• Export named factory functions

MSW Handlers

• Use http from MSW for route handlers
• Return HttpResponse.json() for JSON responses
• Export handlers array for server setup

Page Objects

• Extend BasePage class
• Define abstract url property
• Use byTestId helper for element location

Mock Data

• Export typed mock objects
• Use realistic data patterns
• Include edge case variations

References

• references/Test-Infrastructure-Conventions.md - Complete infrastructure conventions