tdd-workflows-tdd-green

Green Phase: Simple function

def product_list(request): products = Product.objects.all() return JsonResponse({'products': list(products.values())})

Refactor: Class-based view

class ProductListView(View): def get(self, request): products = Product.objects.all() return JsonResponse({'products': list(products.values())})

Refactor: Generic view

class ProductListView(ListView): model = Product context_object_name = 'products'

### Express Patterns

**Inline → Middleware → Service Layer:**

// Green Phase: Inline logic app.post('/api/users', (req, res) => { const user = { id: Date.now(), ...req.body }; users.push(user); res.json(user); });

// Refactor: Extract middleware app.post('/api/users', validateUser, (req, res) => { const user = userService.create(req.body); res.json(user); });

// Refactor: Full layering app.post('/api/users', validateUser, asyncHandler(userController.create) );

## Use this skill when

- Moving from red to green in a TDD cycle
- Implementing minimal behavior to satisfy tests
- You want to keep implementation intentionally simple

## Do not use this skill when

- You are refactoring for design or performance
- Tests are already passing and you need new requirements
- You need a full architectural redesign

## Instructions

1. Review failing tests and identify the smallest fix.
2.