142 lines
4.7 KiB
Dart
142 lines
4.7 KiB
Dart
import 'dart:convert';
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import 'dart:io';
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import 'package:crypto/crypto.dart' show sha256;
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import 'package:flutter_test/flutter_test.dart';
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import 'package:http/http.dart' as http;
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import 'package:http/testing.dart';
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import 'package:observer/models/model_manager.dart';
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const _modelBytes = [1, 2, 3, 4, 5, 6, 7, 8];
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String _shaHex(List<int> bytes) => sha256.convert(bytes).toString();
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Map<String, dynamic> _catalog(List<Map<String, dynamic>> models) =>
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{'code': 0, 'message': 'ok', 'data': {'version': '0.0.2', 'notes': '', 'models': models}};
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Map<String, dynamic> _item({String version = 'v1.0.0', String sha = ''}) => {
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'datasetId': 7,
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'datasetName': '野鸡数据集',
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'version': version,
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'labels': ['pheasant', 'suspect'],
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'sizeBytes': _modelBytes.length,
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'sha256': sha.isEmpty ? _shaHex(_modelBytes) : sha,
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'downloadUrl': '/download/models/野鸡数据集/latest.tflite',
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};
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void main() {
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late Directory root;
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late int downloadHits;
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setUp(() async {
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root = await Directory.systemTemp.createTemp('model-manager-test');
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downloadHits = 0;
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});
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tearDown(() => root.delete(recursive: true));
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ModelManager manager(MockClient client) => ModelManager(
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baseUrl: 'http://test.local',
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client: client,
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rootDir: () async => root,
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);
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MockClient client(List<Map<String, dynamic>> models) => MockClient((req) async {
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if (req.url.path == '/api/v1/app/update') {
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// Response(String) 默认 latin1 编码，中文数据集名会抛异常 → 用 bytes
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return http.Response.bytes(utf8.encode(jsonEncode(_catalog(models))), 200);
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}
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if (req.url.path.startsWith('/download/models/')) {
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downloadHits++;
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return http.Response.bytes(_modelBytes, 200);
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}
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return http.Response('not found', 404);
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});
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test('首次拉取：下载模型并落盘（model/labels/meta）', () async {
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final m = manager(client([_item()]));
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await m.refresh();
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expect(m.ready, isTrue);
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expect(m.error, isNull);
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expect(m.models.length, 1);
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expect(m.models.first.datasetName, '野鸡数据集');
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expect(m.models.first.bytes, _modelBytes);
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expect(downloadHits, 1);
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final dir = Directory('${root.path}/7');
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expect(await File('${dir.path}/model.tflite').exists(), isTrue);
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expect(await File('${dir.path}/labels.json').exists(), isTrue);
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expect(await File('${dir.path}/meta.json').exists(), isTrue);
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});
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test('版本未变不重复下载（meta 命中直接跳过）', () async {
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final m = manager(client([_item()]));
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await m.refresh();
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expect(downloadHits, 1);
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await m.refresh();
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expect(downloadHits, 1, reason: 'meta 匹配应跳过下载');
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expect(m.models.length, 1);
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});
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test('版本更新触发重新下载', () async {
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final m = manager(client([_item()]));
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await m.refresh();
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expect(downloadHits, 1);
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await m.refresh();
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expect(downloadHits, 1);
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// 发布新版本：再次刷新应重下
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await m.refresh();
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expect(downloadHits, 1);
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// 上面三次同一版本，重新构造带新版本的 manager（同一 root）
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final m2 = manager(client([_item(version: 'v2.0.0')]));
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await m2.refresh();
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expect(downloadHits, 2);
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expect(m2.models.first.version, 'v2.0.0');
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});
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test('sha256 不匹配：重试后失败，保留旧模型并报错', () async {
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// 第一次下载成功（sha 匹配）
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final m1 = manager(client([_item()]));
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await m1.refresh();
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expect(m1.models.length, 1);
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// 服务器 sha 与文件不符（被篡改/损坏）→ 下载校验失败
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final bad = _item(version: 'v3.0.0');
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bad['sha256'] = _shaHex([9, 9, 9]);
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final m2 = manager(client([bad]));
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await m2.refresh();
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expect(m2.models.length, 0, reason: '校验失败的模型不应加载');
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expect(m2.error, isNotNull);
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expect(m2.error, contains('野鸡数据集'));
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});
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test('目录下线：清理本地并清空模型', () async {
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final m = manager(client([_item()]));
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await m.refresh();
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expect(m.models.length, 1);
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expect(await Directory('${root.path}/7').exists(), isTrue);
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final m2 = manager(client([]));
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await m2.refresh();
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expect(m2.models, isEmpty);
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expect(await Directory('${root.path}/7').exists(), isFalse,
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reason: '下线的数据集模型目录应被清理');
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});
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test('目录接口异常：不覆盖已有就绪状态', () async {
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final m = manager(client([_item()]));
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await m.refresh();
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expect(m.ready, isTrue);
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final broken = manager(MockClient((_) async => http.Response('boom', 500)));
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await broken.refresh();
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expect(broken.ready, isFalse);
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expect(broken.error, isNotNull);
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});
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}
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