feat(app): 内容安全词库 + 过滤服务 + 分享前检查 — 28 个测试全覆盖
新增文件： - sensitive_words.dart — 8 分类 ~200 条敏感词 + 谐音/形近/数字变体映射 - content_filter_service.dart — 精确匹配 + 变体匹配 + 文本预处理（去零宽/空格/符号） - content_filter_service_test.dart — 28 个测试（8分类精确/安全内容/预处理/变体/边界/词库完整性） 修改： - share_bottom_sheet.dart — 分享到班级前调用 ContentFilterService， 有敏感词时弹出警告对话框（返回修改/仍然分享），新增 contentText 参数
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app/test/data/services/content_filter_service_test.dart
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app/test/data/services/content_filter_service_test.dart
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// ContentFilterService 单元测试
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//
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// 覆盖：精确匹配、谐音变体匹配、文本预处理、各分类检测、边界条件
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import 'package:flutter_test/flutter_test.dart';
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import 'package:nuanji_app/data/services/content_filter_service.dart';
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import 'package:nuanji_app/data/services/sensitive_words.dart';
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void main() {
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// ============================================================
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// 精确匹配 — 各分类
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// ============================================================
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group('精确匹配', () {
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test('暴力类词汇检测', () {
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final matches = ContentFilterService.checkText('我要打死你');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.violence), isTrue);
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expect(matches.any((m) => m.word == '打死你'), isTrue);
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});
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test('色情类词汇检测', () {
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final matches = ContentFilterService.checkText('这个视频很色情');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.sexual), isTrue);
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});
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test('欺凌类词汇检测', () {
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final matches = ContentFilterService.checkText('你是个废物');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.bullying), isTrue);
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expect(matches.any((m) => m.word == '废物'), isTrue);
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});
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test('毒品类词汇检测', () {
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final matches = ContentFilterService.checkText('他在吸毒');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.drugs), isTrue);
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});
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test('赌博类词汇检测', () {
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final matches = ContentFilterService.checkText('我们去赌钱吧');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.gambling), isTrue);
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});
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test('粗口类词汇检测', () {
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final matches = ContentFilterService.checkText('卧槽太厉害了');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.profanity), isTrue);
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});
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test('诈骗类词汇检测', () {
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final matches = ContentFilterService.checkText('恭喜中奖了，点击链接领奖');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.fraud), isTrue);
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});
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test('政治敏感类词汇检测', () {
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final matches = ContentFilterService.checkText('要造反了');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.category == SensitiveCategory.politics), isTrue);
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});
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});
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// ============================================================
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// 安全内容
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// ============================================================
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group('安全内容', () {
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test('正常日记文本不触发', () {
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final text = '今天天气很好，我和小明一起去公园玩，非常开心。'
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'我们玩了滑梯、秋千，还吃了冰淇淋。';
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final matches = ContentFilterService.checkText(text);
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expect(matches, isEmpty);
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});
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test('学习相关文本不触发', () {
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final text = '今天数学课学了乘法，我觉得很有趣。'
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'老师表扬了我，说我进步很大。';
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final matches = ContentFilterService.checkText(text);
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expect(matches, isEmpty);
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});
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});
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// ============================================================
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// 文本预处理 — 绕过手法
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// ============================================================
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group('文本预处理', () {
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test('空格分隔不影响检测', () {
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final matches = ContentFilterService.checkText('我 要 打 死 你');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.word == '打死你'), isTrue);
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});
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test('特殊符号插入不影响检测', () {
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final matches = ContentFilterService.checkText('废.物.垃.圾');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.word == '废物'), isTrue);
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});
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test('零宽字符不影响检测', () {
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// U+200B 零宽空格
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final matches = ContentFilterService.checkText('废物');
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expect(matches, isNotEmpty);
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});
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test('下划线连字符不影响检测', () {
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final matches = ContentFilterService.checkText('废_物');
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expect(matches, isNotEmpty);
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});
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});
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// ============================================================
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// 谐音/变体匹配
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// ============================================================
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group('谐音变体匹配', () {
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test('数字谐音 "4" 匹配含 "死" 的词', () {
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// "去死" 在词库中 → "去4" 应触发匹配
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final matches = ContentFilterService.checkText('你怎么不去4');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.word == '去死'), isTrue);
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});
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test('形近字 "草" 匹配含 "操" 的词', () {
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// "操你" 在词库中 → "草你" 应触发匹配
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final matches = ContentFilterService.checkText('我草你太牛了');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.word == '操你'), isTrue);
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});
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test('变体 "wc" 匹配 "卧槽"', () {
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final matches = ContentFilterService.checkText('wc这个好厉害');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.word == '卧槽'), isTrue);
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});
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test('变体 "莎" 匹配含 "杀" 的词', () {
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// "杀人" 在词库中 → "莎人" 应触发匹配
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final matches = ContentFilterService.checkText('我要莎人了');
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expect(matches, isNotEmpty);
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expect(matches.any((m) => m.word == '杀人'), isTrue);
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});
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});
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// ============================================================
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// 边界条件
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// ============================================================
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group('边界条件', () {
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test('空字符串返回空列表', () {
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expect(ContentFilterService.checkText(''), isEmpty);
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});
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test('纯空格返回空列表', () {
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expect(ContentFilterService.checkText(' '), isEmpty);
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});
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test('纯符号返回空列表', () {
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expect(ContentFilterService.checkText('!@#\$%^&*'), isEmpty);
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});
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test('超长文本不崩溃', () {
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final longText = '今天天气很好。' * 10000; // ~80,000 字符
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final matches = ContentFilterService.checkText(longText);
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expect(matches, isEmpty); // 正常内容
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});
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test('多次出现同一词精确匹配只报告一次', () {
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final matches = ContentFilterService.checkText('白痴白痴');
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final exactMatches = matches.where((m) => m.word == '白痴' && m.position >= 0).toList();
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expect(exactMatches.length, 1);
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});
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});
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// ============================================================
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// 辅助方法
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// ============================================================
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group('辅助方法', () {
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test('hasSensitiveContent 正确判断', () {
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expect(ContentFilterService.hasSensitiveContent('你好世界'), isFalse);
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expect(ContentFilterService.hasSensitiveContent('你是废物'), isTrue);
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});
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test('getMatchedCategories 返回分类标签', () {
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final matches = ContentFilterService.checkText('废物你去死');
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final categories = ContentFilterService.getMatchedCategories(matches);
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expect(categories, isNotEmpty);
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// 至少包含欺凌和暴力
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expect(categories.any((c) => c == '欺凌'), isTrue);
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expect(categories.any((c) => c == '暴力'), isTrue);
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});
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});
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// ============================================================
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// 词库完整性
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// ============================================================
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group('词库完整性', () {
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test('8 个分类都有词', () {
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expect(kSensitiveWords.length, 8);
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for (final entry in kSensitiveWords.entries) {
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expect(entry.value, isNotEmpty, reason: '${entry.key.label} 分类不应为空');
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}
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});
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test('总词量 >= 100', () {
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final total = kSensitiveWords.values.fold(0, (sum, list) => sum + list.length);
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expect(total, greaterThanOrEqualTo(100));
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});
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test('谐音变体映射的 key 都在词库中', () {
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final allWords = kSensitiveWords.values.expand((w) => w).toSet();
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for (final key in kHomophoneVariants.keys) {
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// 变体 key 应该在词库中存在（单字映射除外）
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// 有些变体 key 是单字如 "死"，对应词库中的 "去死" 等
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expect(
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allWords.any((w) => w.contains(key)),
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isTrue,
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reason: '变体 key "$key" 不在词库中',
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);
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}
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});
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});
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}
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