test-firstlisted

# Test-Driven Development Implement TDD for: $ARGUMENTS ## Quick Steps 1. Write a failing test 2. Run test, confirm failure 3. Write minimal code to pass 4. Refactor while keeping tests green 5. Repeat --- ## Red Phase - Write Failing Test ### Test Design Principles - **Test one specific behavior** - **Test name describes expected result** - **Test should fail (feature doesn't exist yet)** ### Must Test - [ ] Normal case - [ ] Edge cases - [ ] Error cases - [ ] Invalid input ### Example ```typescript // auth/login.test.ts it('should return JWT token for valid credentials', async () => { const res = await request(app) .post('/auth/login') .send({ email: 'test@example.com', password: 'password123' }) expect(res.status).toBe(200) expect(res.body.token).toBeDefined() }) ``` --- ## Green Phase - Minimal Implementation ### Implementation Principles - **Write ONLY enough code to pass the test** - **Don't optimize yet** - **Don't worry about elegance** - **Just make it work** --- ## Refactor Phase - Clean Up ### Refactoring Checklist - [ ] Is there code duplication? - [ ] Are variable names clear? - [ ] Are functions too long? - [ ] Is the logic too complex? ### Refactoring Rules - **Keep tests passing** - **Change one thing at a time** - **Run tests frequently** --- ## Test Quality Checklist - [ ] Unit tests cover core logic - [ ] Integration tests cover interactions - [ ] Test names clearly describe intent - [ ] Tests are independent and repeatable -