apskel-pos-flutter-v2/test/weight_based_products_test.dart

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');
    });
  });
}