The following is a Python code example with intentional faults for white-box testing. This code simulates a basic e-commerce system with multiple classes and potential issues. There is a 'Product' class

representing products with name, price, and stock and the `ShoppingCart' class manages items in a shopping cart and interacts with products. class Product: def init (self, name, price, stock): self.name = name self.price price self.stock = stock class Shopping Cart: def = init (self): self.items = {} def add_item(self, product, quantity) : if quantity > 0 and product.stock >= quantity: if product in self.items: self.items [product] = quantity quantity else: self.items [product] product.stock else: quantity raise ValueError ("Invalid quantity or insufficient = -=/nIntentional faults include raising 'ValueError exceptions with incorrect exception types in some methods and checking for invalid conditions. You can use white-box testing to identify these faults, write test cases to cover various scenarios, and ensure the code functions correctly.