refactor: 인벤토리 테이블 스펙과 도메인 계층 정비

test/features/inventory/transactions/presentation/transaction_detail_sync_service_test.dart

@@ -0,0 +1,153 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:superport_v2/features/inventory/transactions/domain/entities/stock_transaction.dart';
+import 'package:superport_v2/features/inventory/transactions/presentation/services/transaction_detail_sync_service.dart';
+
+StockTransactionLine _buildLine({
+  int? id,
+  int productId = 1,
+  int lineNo = 1,
+  int quantity = 1,
+  double unitPrice = 1000,
+  String? note,
+}) {
+  return StockTransactionLine(
+    id: id,
+    lineNo: lineNo,
+    product: StockTransactionProduct(
+      id: productId,
+      code: 'P$productId',
+      name: '제품$productId',
+    ),
+    quantity: quantity,
+    unitPrice: unitPrice,
+    note: note,
+  );
+}
+
+StockTransactionCustomer _buildCustomer({
+  int? id,
+  int customerId = 1,
+  String code = 'C1',
+  String name = '고객1',
+  String? note,
+}) {
+  return StockTransactionCustomer(
+    id: id,
+    customer: StockTransactionCustomerSummary(
+      id: customerId,
+      code: code,
+      name: name,
+    ),
+    note: note,
+  );
+}
+
+void main() {
+  const service = TransactionDetailSyncService();
+
+  group('TransactionDetailSyncService', () {
+    test('buildLinePlan는 생성/수정/삭제 계획을 정확히 산출한다', () {
+      final currentLines = [
+        _buildLine(
+          id: 10,
+          productId: 1,
+          lineNo: 1,
+          quantity: 2,
+          unitPrice: 1000,
+        ),
+        _buildLine(
+          id: 11,
+          productId: 2,
+          lineNo: 2,
+          quantity: 4,
+          unitPrice: 2000,
+        ),
+        _buildLine(
+          id: 12,
+          productId: 3,
+          lineNo: 3,
+          quantity: 6,
+          unitPrice: 3000,
+        ),
+      ];
+
+      final drafts = [
+        TransactionLineDraft(
+          id: 10,
+          lineNo: 1,
+          productId: 1,
+          quantity: 3,
+          unitPrice: 1000,
+          note: null,
+        ),
+        TransactionLineDraft(
+          id: 11,
+          lineNo: 2,
+          productId: 4,
+          quantity: 4,
+          unitPrice: 2200,
+          note: '교체',
+        ),
+        TransactionLineDraft(
+          lineNo: 3,
+          productId: 5,
+          quantity: 1,
+          unitPrice: 500,
+          note: null,
+        ),
+      ];
+
+      final plan = service.buildLinePlan(
+        drafts: drafts,
+        currentLines: currentLines,
+      );
+
+      expect(plan.createdLines.length, 2);
+      final createdProductIds = plan.createdLines.map((line) => line.productId);
+      expect(createdProductIds, containsAll(<int>[4, 5]));
+
+      expect(plan.updatedLines.length, 1);
+      final update = plan.updatedLines.first;
+      expect(update.id, 10);
+      expect(update.quantity, 3);
+      expect(update.unitPrice, isNull);
+      expect(update.note, isNull);
+
+      expect(plan.deletedLineIds.length, 2);
+      expect(plan.deletedLineIds, containsAll(<int>[11, 12]));
+    });
+
+    test('buildCustomerPlan은 고객 추가/수정/삭제를 구분한다', () {
+      final currentCustomers = [
+        _buildCustomer(
+          id: 20,
+          customerId: 100,
+          code: 'C100',
+          name: '고객 100',
+          note: '메모',
+        ),
+        _buildCustomer(id: 21, customerId: 200, code: 'C200', name: '고객 200'),
+      ];
+
+      final drafts = [
+        TransactionCustomerDraft(id: 20, customerId: 100, note: '메모 수정'),
+        TransactionCustomerDraft(customerId: 300, note: null),
+      ];
+
+      final plan = service.buildCustomerPlan(
+        drafts: drafts,
+        currentCustomers: currentCustomers,
+      );
+
+      expect(plan.createdCustomers.length, 1);
+      expect(plan.createdCustomers.first.customerId, 300);
+
+      expect(plan.updatedCustomers.length, 1);
+      expect(plan.updatedCustomers.first.id, 20);
+      expect(plan.updatedCustomers.first.note, '메모 수정');
+
+      expect(plan.deletedCustomerIds.length, 1);
+      expect(plan.deletedCustomerIds.first, 21);
+    });
+  });
+}