blob: 61dc222bbc8964087bca39c70fa51412bbb3609f [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.
// @dart = 2.8
import 'dart:async';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/widgets.dart';
void main() {
final TestAutomatedTestWidgetsFlutterBinding binding = TestAutomatedTestWidgetsFlutterBinding();
testWidgets('Locale is available when Localizations widget stops deferring frames', (WidgetTester tester) async {
final FakeLocalizationsDelegate delegate = FakeLocalizationsDelegate();
await tester.pumpWidget(Localizations(
locale: const Locale('fo'),
delegates: <LocalizationsDelegate<dynamic>>[
child: const Text('loaded')
final dynamic state = tester.state(find.byType(Localizations));
expect(state.locale, isNull);
expect(find.text('loaded'), findsNothing);
Locale locale;
binding.onAllowFrame = () {
locale = state.locale as Locale;
await tester.idle();
expect(locale, const Locale('fo'));
await tester.pump();
expect(find.text('loaded'), findsOneWidget);
class FakeLocalizationsDelegate extends LocalizationsDelegate<String> {
final Completer<String> completer = Completer<String>();
bool isSupported(Locale locale) => true;
Future<String> load(Locale locale) => completer.future;
bool shouldReload(LocalizationsDelegate<String> old) => false;
class TestAutomatedTestWidgetsFlutterBinding extends AutomatedTestWidgetsFlutterBinding {
VoidCallback onAllowFrame;
void allowFirstFrame() {
if (onAllowFrame != null)
class WidgetsLocalizationsDelegate extends LocalizationsDelegate<WidgetsLocalizations> {
bool isSupported(Locale locale) => true;
Future<WidgetsLocalizations> load(Locale locale) => DefaultWidgetsLocalizations.load(locale);
bool shouldReload(WidgetsLocalizationsDelegate old) => false;