feat: dukung penjualan produk per timbangan

Produk kini punya cara jual `unit` (cacah) atau `weight` (timbangan), mengikuti kontrak backend di docs/integration-weight-based-products.md. - tipe SellBy, domain/infrastructure unit baru, dan endpoint /api/v1/units - dialog input berat saat produk timbangan ditambahkan ke keranjang - tiap penimbangan jadi baris keranjang sendiri; total baris dihitung berat x harga satuan, sedangkan produk cacah tetap digabung - request ke backend mengirim quantity 1 dan membawa berat - migrasi DB v3: kolom sell_by, unit_id, unit_name, unit_abbreviation di tabel products supaya satuan tetap tampil saat offline - tampilan keranjang, struk, split bill, void, dan refund memakai berat - test/weight_based_products_test.dart menutup perilaku di atas (9 test) Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-09-06 23:03:31 +07:00
parent 9777f63426
commit 1505a83dd3
72 changed files with 5388 additions and 584 deletions
@@ -0,0 +1,139 @@
+import 'package:apskel_pos_flutter_v2/application/checkout/checkout_form/checkout_form_bloc.dart';
+import 'package:apskel_pos_flutter_v2/common/types/sell_by.dart';
+import 'package:apskel_pos_flutter_v2/domain/order/order.dart';
+import 'package:apskel_pos_flutter_v2/domain/product/product.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+/// Ikan Tude — Rp 4.500 per ons.
+final ikanTude = Product.empty().copyWith(
+  id: 'ikan-tude',
+  name: 'Ikan Tude',
+  price: 4500,
+  isActive: true,
+  sellBy: SellBy.weight,
+  unitId: 'unit-ons',
+  unitName: 'Ons',
+  unitAbbreviation: 'ons',
+);
+
+final nasiGoreng = Product.empty().copyWith(
+  id: 'nasi-goreng',
+  name: 'Nasi Goreng',
+  price: 25000,
+  isActive: true,
+);
+
+void main() {
+  group('keranjang produk timbangan', () {
+    test('dua penimbangan produk yang sama menjadi dua baris', () async {
+      final bloc = CheckoutFormBloc();
+
+      bloc.add(CheckoutFormEvent.addWeightedItem(ikanTude, null, 4.2));
+      bloc.add(CheckoutFormEvent.addWeightedItem(ikanTude, null, 5.6));
+      await bloc.stream.firstWhere((s) => s.items.length == 2);
+
+      final items = bloc.state.items;
+      expect(items.length, 2);
+      expect(items.map((e) => e.weight), [4.2, 5.6]);
+      expect(items.every((e) => e.quantity == 1), isTrue);
+      expect(items[0].lineId, isNot(items[1].lineId));
+    });
+
+    test('produk cacah tetap digabung jadi satu baris', () async {
+      final bloc = CheckoutFormBloc();
+
+      bloc.add(CheckoutFormEvent.addItem(nasiGoreng, null));
+      bloc.add(CheckoutFormEvent.addItem(nasiGoreng, null));
+      await bloc.stream.firstWhere((s) => s.items.isNotEmpty && s.items.first.quantity == 2);
+
+      expect(bloc.state.items.length, 1);
+      expect(bloc.state.items.first.quantity, 2);
+    });
+
+    test('produk timbangan tidak bisa masuk tanpa berat', () async {
+      final bloc = CheckoutFormBloc();
+
+      bloc.add(CheckoutFormEvent.addItem(ikanTude, null));
+      await Future<void>.delayed(Duration.zero);
+
+      expect(bloc.state.items, isEmpty);
+    });
+
+    test('total baris dihitung berat x harga satuan', () {
+      final line = ProductQuantity(
+        product: ikanTude,
+        quantity: 1,
+        notes: '',
+        weight: 4.2,
+      );
+
+      expect(line.lineTotal, closeTo(18900, 0.001));
+      expect(line.quantityLabel, '4,2 ons');
+    });
+
+    test('total keranjang mencampur baris berbobot dan baris cacah', () {
+      final items = [
+        ProductQuantity(
+          product: ikanTude,
+          quantity: 1,
+          notes: '',
+          weight: 4.2,
+        ),
+        ProductQuantity(product: nasiGoreng, quantity: 2, notes: ''),
+      ];
+
+      expect(items.cartTotal, closeTo(18900 + 50000, 0.001));
+      expect(items.cartItemCount, 3);
+    });
+  });
+
+  group('permintaan ke backend', () {
+    test('baris berbobot dikirim quantity 1 dan membawa berat', () {
+      final request = OrderItemRequest.fromProductQuantity(
+        ProductQuantity(
+          product: ikanTude,
+          quantity: 1,
+          notes: '',
+          weight: 4.2,
+        ),
+      );
+
+      expect(request.quantity, 1);
+      expect(request.weight, 4.2);
+      expect(request.unitPrice, 4500);
+    });
+
+    test('produk cacah tidak membawa berat sama sekali', () {
+      final request = OrderItemRequest.fromProductQuantity(
+        ProductQuantity(product: nasiGoreng, quantity: 2, notes: ''),
+      );
+
+      expect(request.quantity, 2);
+      expect(request.weight, isNull);
+    });
+  });
+
+  group('tampilan baris pesanan', () {
+    test('baris berbobot memakai berat, bukan quantity', () {
+      final item = OrderItem.empty().copyWith(
+        quantity: 1,
+        unitPrice: 4500,
+        totalPrice: 18900,
+        weight: 4.2,
+        unitAbbreviation: 'ons',
+      );
+
+      expect(item.isWeighted, isTrue);
+      expect(item.quantityLabel, '4,2 ons');
+      expect(item.quantityPriceLabel, '4,2 ons x Rp 4.500');
+    });
+
+    test('baris biasa tetap memakai quantity', () {
+      final item = OrderItem.empty().copyWith(quantity: 2, unitPrice: 25000);
+
+      expect(item.isWeighted, isFalse);
+      expect(item.quantityLabel, '2');
+      expect(item.quantityPriceLabel, '2 x Rp 25.000');
+    });
+  });
+}