work on test models part 1

test/model/address_test.dart

@@ -0,0 +1,59 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tm_app/data/services/model/address/address.dart';
+
+void main() {
+  group('Address Model Tests', () {
+    test('fromJson should create a valid Address object', () {
+      final json = {
+        'street': '123 Main St',
+        'city': 'Tehran',
+        'state': 'Tehran',
+        'postal_code': '12345',
+        'country': 'Iran',
+        'address_type': 'home',
+        'is_default': true, 
+      };
+
+      final address = Address.fromJson(json);
+
+      expect(address.street, '123 Main St');
+      expect(address.city, 'Tehran');
+      expect(address.isDefault, true);
+    });
+
+    test('toJson should return a valid JSON map', () {
+      final address = const Address(
+        street: '456 Elm St',
+        city: 'Shiraz',
+        state: 'Fars',
+        postalCode: '67890',
+        country: 'Iran',
+        addressType: 'office',
+        isDefault: false,
+      );
+
+      final json = address.toJson();
+
+      expect(json['street'], '456 Elm St');
+      expect(json['city'], 'Shiraz');
+      expect(json['is_default'], false);
+    });
+
+    test('copyWith should create a new Address with updated fields', () {
+      final address = const Address(
+        street: 'A',
+        city: 'B',
+        state: 'C',
+        postalCode: 'D',
+        country: 'E',
+        addressType: 'home',
+        isDefault: false,
+      );
+
+      final newAddress = address.copyWith(city: 'Tehran');
+
+      expect(newAddress.city, 'Tehran');
+      expect(newAddress.street, 'A');
+    });
+  });
+}