check update

flutter_app/test/update_service_test.dart

@@ -0,0 +1,69 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:rmtpocketwatcher/services/update_service.dart';
+
+void main() {
+  group('UpdateService', () {
+    late UpdateService updateService;
+
+    setUp(() {
+      updateService = UpdateService();
+    });
+
+    test('version extraction works correctly', () {
+      // Test version extraction
+      expect(updateService.extractVersionFromTag('v1.2.3'), equals('1.2.3'));
+      expect(updateService.extractVersionFromTag('1.2.3'), equals('1.2.3'));
+      expect(updateService.extractVersionFromTag('v2.0.0'), equals('2.0.0'));
+    });
+
+    test('newer version detection works correctly', () {
+      expect(updateService.isNewerVersion('1.2.4', '1.2.3'), isTrue);
+      expect(updateService.isNewerVersion('1.3.0', '1.2.9'), isTrue);
+      expect(updateService.isNewerVersion('2.0.0', '1.9.9'), isTrue);
+      expect(updateService.isNewerVersion('1.2.3', '1.2.3'), isFalse);
+      expect(updateService.isNewerVersion('1.2.2', '1.2.3'), isFalse);
+      expect(updateService.isNewerVersion('1.1.9', '1.2.0'), isFalse);
+    });
+
+    test('platform asset detection works', () {
+      final assets = [
+        ReleaseAsset(
+          name: 'rmtPocketWatcher-windows-x64.exe',
+          downloadUrl: 'https://example.com/windows.exe',
+          size: 1024,
+          contentType: 'application/octet-stream',
+        ),
+        ReleaseAsset(
+          name: 'rmtPocketWatcher-macos.dmg',
+          downloadUrl: 'https://example.com/macos.dmg',
+          size: 2048,
+          contentType: 'application/octet-stream',
+        ),
+        ReleaseAsset(
+          name: 'rmtPocketWatcher-linux.appimage',
+          downloadUrl: 'https://example.com/linux.appimage',
+          size: 3072,
+          contentType: 'application/octet-stream',
+        ),
+      ];
+
+      final updateInfo = UpdateInfo(
+        currentVersion: '1.0.0',
+        latestVersion: '1.1.0',
+        releaseUrl: 'https://example.com/release',
+        releaseName: 'Test Release',
+        releaseNotes: 'Test notes',
+        publishedAt: DateTime.now(),
+        assets: assets,
+      );
+
+      // This test would need to mock the platform detection
+      // For now, just verify the asset list is properly structured
+      expect(updateInfo.assets.length, equals(3));
+      expect(updateInfo.assets.first.name, contains('windows'));
+    });
+  });
+}
+
+// Note: The methods extractVersionFromTag and isNewerVersion are now public
+// and marked with @visibleForTesting for testing purposes