lxh2875931338
b8138ad125
之前只要 confidence>=0.6 且 validation_count>=2 就升级 verified，
两次读到不同结果也会被当成"验证通过"，错误标签一旦写入很难纠正。
新增 MetadataStability（纯函数，可单测）：
- 首次见到 → pending(first_seen)，次数 1
- 与上次记录标题/艺术家冲突 → pending(conflict)，次数重置为 1
- 一致且次数 >= 2、置信度达标 → verified(stable)
- 置信度不足 → pending(low_confidence)，次数继续累计
- 字段缺失不算冲突；比较时忽略大小写与首尾空格
metadata_service 改为调用该状态机，并打印判定原因：
🧭 [MetadataService] 状态机: stable → verified（validations=2）
测试：新增 test/metadata_stability_test.dart 7 个用例，
连同原有 9 个共 16 个，flutter test 全绿。
已构建并安装 release 验证。
125 lines
3.5 KiB
Dart
125 lines
3.5 KiB
Dart
// test/metadata_stability_test.dart
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import 'package:flutter_test/flutter_test.dart';
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import 'package:qingting_player/metadata/metadata_model.dart';
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import 'package:qingting_player/metadata/metadata_stability.dart';
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void main() {
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CandidateMetadata candidate({double confidence = 0.8}) => CandidateMetadata(
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metadata: const NormalizedMetadata(title: '夜曲', artist: '周杰伦'),
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confidence: confidence,
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);
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group('MetadataStability', () {
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test('首次见到 → pending，次数 1', () {
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final d = MetadataStability.decide(
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previous: null,
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candidate: candidate(),
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title: '夜曲',
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artist: '周杰伦',
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);
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expect(d.status, 'pending');
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expect(d.reason, 'first_seen');
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expect(d.validationCount, 1);
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});
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test('第二次结果一致且置信度达标 → verified', () {
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final d = MetadataStability.decide(
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previous: {
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'title': '夜曲',
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'artist': '周杰伦',
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'confidence': 0.8,
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'validation_count': 1,
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},
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candidate: candidate(),
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title: '夜曲',
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artist: '周杰伦',
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);
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expect(d.status, 'verified');
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expect(d.reason, 'stable');
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expect(d.validationCount, 2);
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});
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test('标题或艺术家冲突 → 次数重置为 1，保持 pending', () {
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final d = MetadataStability.decide(
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previous: {
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'title': '夜曲',
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'artist': '周杰伦',
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'confidence': 0.9,
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'validation_count': 5,
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},
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candidate: candidate(),
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title: '完全不同的歌',
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artist: '别的歌手',
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);
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expect(d.status, 'pending');
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expect(d.reason, 'conflict');
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expect(d.validationCount, 1);
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});
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test('置信度不足 → pending，但次数继续累计', () {
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final d = MetadataStability.decide(
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previous: {
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'title': '夜曲',
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'artist': '周杰伦',
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'confidence': 0.4,
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'validation_count': 3,
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},
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candidate: candidate(confidence: 0.5),
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title: '夜曲',
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artist: '周杰伦',
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);
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expect(d.status, 'pending');
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expect(d.reason, 'low_confidence');
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expect(d.validationCount, 4);
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});
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test('一致但只验证过一次 → pending', () {
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final d = MetadataStability.decide(
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previous: {
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'title': '夜曲',
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'artist': '周杰伦',
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'confidence': 0.8,
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'validation_count': 0,
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},
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candidate: candidate(),
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title: '夜曲',
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artist: '周杰伦',
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);
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expect(d.status, 'pending');
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expect(d.reason, 'need_second_validation');
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expect(d.validationCount, 1);
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});
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test('字段缺失不算冲突（旧记录没有艺术家）', () {
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final d = MetadataStability.decide(
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previous: {
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'title': '夜曲',
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'artist': '',
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'confidence': 0.7,
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'validation_count': 1,
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},
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candidate: candidate(),
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title: '夜曲',
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artist: '周杰伦',
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);
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expect(d.status, 'verified');
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expect(d.validationCount, 2);
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});
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test('大小写与首尾空格不影响一致性判断', () {
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final d = MetadataStability.decide(
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previous: {
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'title': ' Night Song ',
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'artist': 'JAY',
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'confidence': 0.8,
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'validation_count': 1,
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},
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candidate: candidate(),
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title: 'night song',
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artist: 'jay',
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);
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expect(d.status, 'verified');
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});
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});
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}
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