| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'package:flutter/services.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| /// Simulates a system back, like a back gesture on Android. |
| /// |
| /// Sends the same platform channel message that the engine sends when it |
| /// receives a system back. |
| Future<void> simulateSystemBack() { |
| return TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.handlePlatformMessage( |
| 'flutter/navigation', |
| const JSONMessageCodec().encodeMessage(<String, dynamic>{ |
| 'method': 'popRoute', |
| }), |
| (ByteData? _) {}, |
| ); |
| } |