work on test models part 1

test/model/feedback_stat_response_test.dart

@@ -0,0 +1,74 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tm_app/data/services/model/feedback_stats_response/feedback_stat_response.dart';
+
+void main() {
+  group('FeedbackStatResponse Model Tests', () {
+    final mockJson = {
+      'success': true,
+      'message': 'Company stats retrieved successfully',
+      'error': {'message': null, 'code': null, 'details': null},
+      'data': {
+        'company_id': '68c7fea825ff3fc682529856',
+        'total_likes': 1,
+        'total_dislikes': 0,
+        'total_feedback': 1,
+        'last_updated': 1759746927,
+      },
+    };
+
+    test('fromJson creates valid FeedbackStatResponse instance', () {
+      final response = FeedbackStatResponse.fromJson(mockJson);
+
+      expect(response.success, isTrue);
+      expect(response.message, 'Company stats retrieved successfully');
+
+      final data = response.data!;
+      expect(data.companyId, '68c7fea825ff3fc682529856');
+      expect(data.totalLikes, 1);
+      expect(data.totalDislikes, 0);
+      expect(data.totalFeedback, 1);
+      expect(data.lastUpdated, 1759746927);
+
+      expect(response.error?.message, isNull);
+    });
+
+    test('toJson converts model back to JSON correctly', () {
+      final response = FeedbackStatResponse.fromJson(mockJson);
+      final json = response.toJson();
+
+      expect(json['success'], true);
+      expect(json['message'], 'Company stats retrieved successfully');
+
+      final data = response.data?.toJson() ?? {};
+
+      expect(data['company_id'], '68c7fea825ff3fc682529856');
+      expect(data['total_likes'], 1);
+      expect(data['total_dislikes'], 0);
+      expect(data['total_feedback'], 1);
+      expect(data['last_updated'], 1759746927);
+    });
+
+    test('copyWith correctly updates fields', () {
+      final response = FeedbackStatResponse.fromJson(mockJson);
+
+      final updated = response.copyWith(
+        message: 'Updated Message',
+        success: false,
+        data: response.data?.copyWith(totalLikes: 10),
+      );
+
+      expect(updated.message, 'Updated Message');
+      expect(updated.success, isFalse);
+      expect(updated.data?.totalLikes, 10);
+      expect(updated.data?.companyId, '68c7fea825ff3fc682529856');
+    });
+
+    test('equality operator works as expected', () {
+      final r1 = FeedbackStatResponse.fromJson(mockJson);
+      final r2 = FeedbackStatResponse.fromJson(mockJson);
+
+      expect(r1, equals(r2));
+      expect(r1.hashCode, equals(r2.hashCode));
+    });
+  });
+}