fiatcode
3d94c96ed2
- Password Validator kata with starter code and tests - Shopping Cart kata with starter code and tests - FizzBuzz reference code (from live demo) - Setup guide and TDD reference card - No solutions included (participants implement themselves)
46 lines
1.2 KiB
Dart
46 lines
1.2 KiB
Dart
// TODO: Implement ShoppingCart using TDD.
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//
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// Domain rules (implement one at a time, test first!):
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// 1. Add an item (name, price, quantity) to the cart
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// 2. Get the subtotal (sum of price × quantity for all items)
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// 3. Remove an item by name
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// 4. Get total item count (sum of all quantities)
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// 5. Apply a percentage discount to the subtotal (e.g. 10% off)
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// 6. Items with zero or negative price are rejected
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//
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// CartItem is a Value Object — immutable, validated at construction.
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// ShoppingCart is stateful — it accumulates items across calls.
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class CartItem {
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final String name;
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final double price;
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final int quantity;
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CartItem({required this.name, required this.price, required this.quantity}) {
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// TODO: validate price > 0 and quantity > 0
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}
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}
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class ShoppingCart {
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// TODO: implement
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void addItem(CartItem item) {
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throw UnimplementedError();
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}
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void removeItem(String name) {
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throw UnimplementedError();
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}
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double subtotal() {
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throw UnimplementedError();
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}
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int itemCount() {
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throw UnimplementedError();
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}
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double totalAfterDiscount(double discountPercent) {
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throw UnimplementedError();
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}
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}
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