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+// 评论模型解析单测（《03-接口文档》6.3/6.4）
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:video_app/models/comment_item.dart';
+
+void main() {
+  group('CommentItem.fromJson', () {
+    test('完整字段解析', () {
+      final c = CommentItem.fromJson(const {
+        'comment_id': 55001,
+        'user': {
+          'user_id': 100030,
+          'nickname': '阿花',
+          'avatar_url': 'https://cdn/a.jpg',
+        },
+        'content': '拍得真好',
+        'like_count': 12,
+        'reply_count': 3,
+        'created_at': '2026-10-14 10:00:00',
+      });
+      expect(c.commentId, 55001);
+      expect(c.userId, 100030);
+      expect(c.nickname, '阿花');
+      expect(c.avatarUrl, 'https://cdn/a.jpg');
+      expect(c.content, '拍得真好');
+      expect(c.likeCount, 12);
+      expect(c.replyCount, 3);
+      expect(c.createdAt, '2026-10-14 10:00:00');
+    });
+
+    test('字段缺失按默认值兜底', () {
+      final c = CommentItem.fromJson(const {});
+      expect(c.commentId, 0);
+      expect(c.nickname, '');
+      expect(c.replyCount, 0);
+    });
+
+    test('copyWith 更新回复数', () {
+      final c = CommentItem(commentId: 1, userId: 2, replyCount: 3);
+      final c2 = c.copyWith(replyCount: 4);
+      expect(c2.replyCount, 4);
+      expect(c2.commentId, 1);
+      expect(c.replyCount, 3); // 原对象不变
+    });
+  });
+
+  group('CommentListPage.fromJson', () {
+    test('total 与列表解析', () {
+      final page = CommentListPage.fromJson(const {
+        'total': 78,
+        'list': [
+          {
+            'comment_id': 55001,
+            'user': {'user_id': 100030, 'nickname': '阿花', 'avatar_url': ''},
+            'content': '拍得真好',
+            'like_count': 12,
+            'reply_count': 3,
+            'created_at': '2026-10-14 10:00:00',
+          },
+        ],
+      });
+      expect(page.total, 78);
+      expect(page.items, hasLength(1));
+      expect(page.items.first.commentId, 55001);
+    });
+  });
+
+  group('RewardProgress / CommentCreateResult', () {
+    test('普通发表：未发奖', () {
+      final r = CommentCreateResult.fromJson(const {
+        'comment_id': 55010,
+        'reward_progress': {
+          'current': 5,
+          'target': 10,
+          'rewarded_this_time': false,
+        },
+      });
+      expect(r.commentId, 55010);
+      expect(r.rewardProgress.current, 5);
+      expect(r.rewardProgress.target, 10);
+      expect(r.rewardProgress.rewardedThisTime, isFalse);
+      expect(r.rewardProgress.rewardPoints, 0);
+    });
+
+    test('满刻度发奖：reward_points 解析', () {
+      final r = CommentCreateResult.fromJson(const {
+        'comment_id': 55011,
+        'reward_progress': {
+          'current': 0,
+          'target': 10,
+          'rewarded_this_time': true,
+          'reward_points': 1,
+        },
+      });
+      expect(r.rewardProgress.rewardedThisTime, isTrue);
+      expect(r.rewardProgress.rewardPoints, 1);
+    });
+  });
+}