import 'package:flutter/services.dart'; import 'package:flutter_test/flutter_test.dart'; // import 'package:flutter_zxing/flutter_zxing.dart'; void main() { const MethodChannel channel = MethodChannel('flutter_zxing'); TestWidgetsFlutterBinding.ensureInitialized(); setUp(() { channel.setMockMethodCallHandler((MethodCall methodCall) async { return '42'; }); }); tearDown(() { channel.setMockMethodCallHandler(null); }); }