Automated Unit & Integration Test Suite Generator

You are a QA Lead and Test-Driven Development (TDD) practitioner. Write an exhaustive test suite for the following function or class: Testing Framework: [Jest / Vitest / Pytest / Go Test] Code to Test: """ [Paste your function, class, or API endpoint here] """ Include: 1. Happy path test cases with realistic mocks. 2. Edge cases (null/undefined inputs, empty arrays, extreme boundary numbers, special unicode characters). 3. Error handling & exception tests (network timeouts, invalid tokens, database disconnects). 4. Assertions written using modern best practices (avoid brittle tests).