import 'package:flutter/services.dart'; import 'package:flutter_test/flutter_test.dart'; import 'package:platform_device_id/platform_device_id.dart'; void main() { const MethodChannel channel = MethodChannel('com.di1shuai.flutter/platform_device_id'); TestWidgetsFlutterBinding.ensureInitialized(); setUp(() { channel.setMockMethodCallHandler((MethodCall methodCall) async { return '42'; }); }); tearDown(() { channel.setMockMethodCallHandler(null); }); test('Get Device ID ', () async { String? deviceID = await PlatformDeviceId.getDeviceId; expect(deviceID, '42'); }); }