• auth-integration.test.ts — basic Better‑Auth HTTP integration tests
• email-security.test.ts — email provider security/log redaction tests
• e2e-auth-billing.test.ts — new end‑to‑end auth + billing flow with Polar webhook simulation
• helpers/e2e-helpers.ts — new shared test helper (HTTP wrapper, DB verification toggle, webhook simulators)

Make sure your dev server is running locally:

pnpm dev

Confirm the environment variables in .env.test or .env (at minimum DATABASE_URL and TEST_BASE_URL, defaults to http://localhost:3000).

Run the full test suite:

pnpm test

Run only the new E2E spec:

pnpm run test:e2e

• Email verification: The E2E test marks the user as verified directly in the database for determinism and to avoid email parsing.
• Polar sandbox: The test does not hit Polar's network. Instead, it simulates Polar webhook events by invoking polarWebhookHandlers directly, and mocks ~/server/polar to avoid SDK calls (e.g., invoice generation).
• Checkout URL test (optional): If PLANS.pro.polarProductId (derived from your Polar product env vars) is set, the test attempts to start checkout and asserts that a URL is returned. If not configured, it is skipped gracefully.

If you prefer real end‑to‑end payment interactions with Polar sandbox:

1. Set your POLAR_* env vars (access token, org, product IDs).
2. Disable the vi.mock('~/server/polar', ...) in the E2E test and point webhooks to your local app (e.g., via ngrok or the included Cloudflare tunnel profile).
3. Ensure webhook signatures are properly configured.