patbond-flutter/test/core/widgets/post_card_test.dart

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
import 'package:patbond_flutter/core/widgets/like_button.dart';
import 'package:patbond_flutter/core/widgets/post_card.dart';
import 'package:patbond_flutter/core/widgets/post_media_grid.dart';
import 'package:patbond_flutter/features/community/community_models.dart';
import 'package:patbond_flutter/widgets/common.dart';

import '../../helpers/community_test_helpers.dart';

FeedCard cardFrom(Map<String, dynamic> overrides) =>
    FeedCard.fromJson({...sampleFeedCardJson(), ...overrides});

Widget wrap(Widget child) => MaterialApp(
  theme: buildAppTheme(),
  home: Scaffold(body: SingleChildScrollView(child: child)),
);

void main() {
  testWidgets('单图形态：通栏 4:3 出血，不走九宫格，预览 2 行', (tester) async {
    final card = cardFrom({'mediaCount': 1});
    await tester.pumpWidget(wrap(PostCard(card: card)));

    expect(find.byType(AspectRatio), findsOneWidget);
    expect(find.byType(PostMediaGrid), findsNothing);
    final preview = tester.widget<Text>(find.text('晒了一下午太阳。'));
    expect(preview.maxLines, 2);
  });

  testWidgets('多图形态：九宫格折叠封面 + 「+N」角标（契约只带封面与计数）', (tester) async {
    final card = cardFrom({'mediaCount': 5});
    await tester.pumpWidget(wrap(PostCard(card: card)));

    expect(find.byType(PostMediaGrid), findsOneWidget);
    expect(find.text('+4'), findsOneWidget);
  });

  testWidgets('纯文字形态：无媒体区，正文放宽 6 行、15/1.6', (tester) async {
    final card = cardFrom({'coverImage': null, 'mediaCount': 0});
    await tester.pumpWidget(wrap(PostCard(card: card)));

    expect(find.byType(PostMediaGrid), findsNothing);
    expect(find.byType(AspectRatio), findsNothing);
    final preview = tester.widget<Text>(find.text('晒了一下午太阳。'));
    expect(preview.maxLines, 6);
    expect(preview.style?.fontSize, 15);
  });

  testWidgets('头部行：作者名 + 相对时间；求助帖追加 accent 标', (tester) async {
    final card = cardFrom({
      'category': 'help',
      'publishedAt': DateTime.now()
          .subtract(const Duration(hours: 2))
          .toUtc()
          .toIso8601String(),
    });
    await tester.pumpWidget(wrap(PostCard(card: card)));

    expect(find.text('毛毛的铲屎官'), findsOneWidget);
    expect(find.text('2 小时前'), findsOneWidget);
    expect(find.widgetWithText(TagPill, '求助'), findsOneWidget);
  });

  testWidgets('降级作者：占位头像 + 「宠友」默认名', (tester) async {
    final card = cardFrom({
      'author': sampleAuthorJson(nickname: null, avatarUrl: null),
    });
    await tester.pumpWidget(wrap(PostCard(card: card)));

    expect(find.text('宠友'), findsOneWidget);
    expect(find.text('毛毛的铲屎官'), findsNothing);
  });

  testWidgets('操作行：计数与激活态展示；T3-14 纯展示点按无副作用', (tester) async {
    final card = cardFrom({
      'likedByMe': true,
      'likeCount': 6,
      'bookmarkedByMe': false,
      'bookmarkCount': 2,
      'commentCount': 3,
    });
    await tester.pumpWidget(wrap(PostCard(card: card)));

    expect(find.text('6'), findsOneWidget);
    expect(find.text('2'), findsOneWidget);
    expect(find.text('3'), findsOneWidget);
    // 点赞激活：实心 favorite + error 色（Colors.red 修订 D6）。
    final likeIcon = tester.widget<Icon>(find.byIcon(Icons.favorite));
    expect(likeIcon.color, AppColors.error);
    // 收藏未激活：描边 + inkSoft。
    final bookmarkIcon = tester.widget<Icon>(
      find.byIcon(Icons.bookmark_border),
    );
    expect(bookmarkIcon.color, AppColors.inkSoft);

    // 回调未接（null）：点按不抛错、无状态变化。
    await tester.tap(find.byType(LikeButton).first, warnIfMissed: false);
    await tester.pump();
    expect(find.byIcon(Icons.favorite), findsOneWidget);
  });
}