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93 lines
3.0 KiB
Dart
93 lines
3.0 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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final TestAutomatedTestWidgetsFlutterBinding binding = TestAutomatedTestWidgetsFlutterBinding();
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testWidgets('Locale is available when Localizations widget stops deferring frames', (WidgetTester tester) async {
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final FakeLocalizationsDelegate delegate = FakeLocalizationsDelegate();
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await tester.pumpWidget(Localizations(
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locale: const Locale('fo'),
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delegates: <LocalizationsDelegate<dynamic>>[
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WidgetsLocalizationsDelegate(),
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delegate,
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],
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child: const Text('loaded'),
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));
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final dynamic state = tester.state(find.byType(Localizations));
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// ignore: avoid_dynamic_calls
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expect(state!.locale, isNull);
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expect(find.text('loaded'), findsNothing);
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late Locale locale;
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binding.onAllowFrame = () {
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// ignore: avoid_dynamic_calls
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locale = state.locale as Locale;
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};
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delegate.completer.complete('foo');
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await tester.idle();
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expect(locale, const Locale('fo'));
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await tester.pump();
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expect(find.text('loaded'), findsOneWidget);
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});
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testWidgets('Localizations.localeOf throws when no localizations exist', (WidgetTester tester) async {
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final GlobalKey contextKey = GlobalKey(debugLabel: 'Test Key');
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await tester.pumpWidget(Container(key: contextKey));
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expect(() => Localizations.localeOf(contextKey.currentContext!), throwsA(isAssertionError.having(
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(AssertionError e) => e.message,
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'message',
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contains('does not include a Localizations ancestor'),
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)));
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});
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testWidgets('Localizations.maybeLocaleOf returns null when no localizations exist', (WidgetTester tester) async {
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final GlobalKey contextKey = GlobalKey(debugLabel: 'Test Key');
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await tester.pumpWidget(Container(key: contextKey));
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expect(Localizations.maybeLocaleOf(contextKey.currentContext!), isNull);
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});
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}
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class FakeLocalizationsDelegate extends LocalizationsDelegate<String> {
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final Completer<String> completer = Completer<String>();
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@override
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bool isSupported(Locale locale) => true;
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@override
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Future<String> load(Locale locale) => completer.future;
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@override
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bool shouldReload(LocalizationsDelegate<String> old) => false;
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}
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class TestAutomatedTestWidgetsFlutterBinding extends AutomatedTestWidgetsFlutterBinding {
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VoidCallback? onAllowFrame;
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@override
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void allowFirstFrame() {
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onAllowFrame?.call();
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super.allowFirstFrame();
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}
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}
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class WidgetsLocalizationsDelegate extends LocalizationsDelegate<WidgetsLocalizations> {
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@override
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bool isSupported(Locale locale) => true;
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@override
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Future<WidgetsLocalizations> load(Locale locale) => DefaultWidgetsLocalizations.load(locale);
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@override
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bool shouldReload(WidgetsLocalizationsDelegate old) => false;
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}
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