For E2E tests: Use prowler-test-ui skill (Playwright). This skill covers unit/integration tests with Vitest + React Testing Library.

Prowler UI Test Projects (`ui/vitest.config.ts`)

Project	Files	Environment	Setup
`unit`	`*/.test.{ts,tsx}` (excludes `tests/*`, `.integration.test.*`)	jsdom, no React Compiler	`vitest.setup.ts` (jest-dom matchers, storage mock)
`integration`	`*/.integration.test.{ts,tsx}`	Vitest browser mode, Playwright Chromium, React Compiler	`vitest.integration.setup.ts` (MSW worker, `globals.css`, mocks for `@/auth.config`, `next/cache`, `server-only`)

Tests are co-located next to the code (foo.ts -> foo.test.ts); shared fixtures live in ui/__tests__/.
Config sets globals, restoreMocks, mockReset, unstubEnvs, unstubGlobals: do not add afterEach(vi.restoreAllMocks) boilerplate.
Integration tests import page/userEvent from vitest/browser, render with @/__tests__/render-browser, and mock HTTP with MSW (ui/__tests__/msw/), not vi.mock of fetch.

Test Structure (REQUIRED)

Use Given/When/Then (AAA) pattern with comments: