blob: c2049e87e4bc85dce306b2102ecefae4a8db74b0 [file] [log] [blame]
// 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';
void main() {
// We need a separate test file for this test case (instead of including it
// in platform_channel_test.dart) since we rely on the WidgetsFlutterBinding
// not being initialized and we call ensureInitialized() in the other test
// file.
test('throws assertion error iff WidgetsFlutterBinding is not yet initialized', () {
const MethodChannel methodChannel = MethodChannel('mock');
// Ensure that accessing the binary messenger before initialization reports
// a helpful error message.
expect(() => methodChannel.binaryMessenger, throwsA(isA<AssertionError>()
.having((AssertionError e) => e.message, 'message', contains('WidgetsFlutterBinding.ensureInitialized()'))));
expect(() => methodChannel.binaryMessenger, returnsNormally);