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4.7Key Takeaways
- Test every auth method: valid, missing, invalid, expired, and tampered credentials
- JWT tests should cover expiration, tampering, and refresh flows
- Authorization (RBAC) tests verify role-permission boundaries
- IDOR tests verify users cannot access other users' private data
- Error messages should not leak information (user enumeration, stack traces)
- Cookie security: verify HttpOnly, Secure, and SameSite attributes