test(localization): add unit tests
Signed-off-by: xsahil03x <[email protected]>
This commit is contained in:
Sahil Kumar
@@ -0,0 +1,276 @@
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// ignore_for_file: prefer_expression_function_bodies
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:stream_chat_flutter/stream_chat_flutter.dart';
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import 'package:stream_chat_localizations/src/stream_chat_localizations.dart';
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import 'package:flutter_test/flutter_test.dart';
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class FooStreamChatLocalizations extends StreamChatLocalizationsEn {
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FooStreamChatLocalizations(
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Locale localeName,
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this.launchUrlError,
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) : super(localeName: localeName.toString());
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@override
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final String launchUrlError;
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}
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class FooStreamChatLocalizationsDelegate
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extends LocalizationsDelegate<StreamChatLocalizations> {
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const FooStreamChatLocalizationsDelegate({
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this.supportedLanguage = 'en',
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this.launchUrlError = 'foo',
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});
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final String supportedLanguage;
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final String launchUrlError;
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@override
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bool isSupported(Locale locale) =>
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supportedLanguage == 'allLanguages' ||
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locale.languageCode == supportedLanguage;
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@override
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Future<FooStreamChatLocalizations> load(Locale locale) =>
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SynchronousFuture<FooStreamChatLocalizations>(
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FooStreamChatLocalizations(locale, launchUrlError),
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);
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@override
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bool shouldReload(FooStreamChatLocalizationsDelegate old) => false;
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}
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Widget buildFrame({
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Locale? locale,
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Iterable<LocalizationsDelegate> delegates =
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GlobalStreamChatLocalizations.delegates,
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required WidgetBuilder buildContent,
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LocaleResolutionCallback? localeResolutionCallback,
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Iterable<Locale> supportedLocales = const <Locale>[
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Locale('en', 'US'),
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Locale('hi', 'IN'),
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],
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}) =>
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MaterialApp(
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color: const Color(0xFFFFFFFF),
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locale: locale,
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supportedLocales: supportedLocales,
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localizationsDelegates: delegates,
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localeResolutionCallback: localeResolutionCallback,
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onGenerateRoute: (RouteSettings settings) => MaterialPageRoute<void>(
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builder: (BuildContext context) => buildContent(context)),
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);
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void main() {
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testWidgets(
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'Locale fallbacks',
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(WidgetTester tester) async {
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final Key textKey = UniqueKey();
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await tester.pumpWidget(
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buildFrame(
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buildContent: (BuildContext context) => Text(
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StreamChatLocalizations.of(context)!.launchUrlError,
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key: textKey,
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),
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),
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);
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expect(
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tester.widget<Text>(find.byKey(textKey)).data,
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'Cannot launch the url',
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);
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// Unrecognized locale falls back to 'en'
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await tester.binding.setLocale('foo', 'BAR');
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await tester.pump();
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expect(
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tester.widget<Text>(find.byKey(textKey)).data,
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'Cannot launch the url',
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);
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// Indian hindi locale, falls back to just 'hi'
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await tester.binding.setLocale('hi', 'IN');
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await tester.pump();
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expect(
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tester.widget<Text>(find.byKey(textKey)).data,
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'यूआरएल लॉन्च नहीं कर सकते',
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);
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},
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);
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testWidgets(
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"Localizations.override widget tracks parent's locale",
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(WidgetTester tester) async {
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Widget buildLocaleFrame(Locale locale) => buildFrame(
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locale: locale,
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supportedLocales: <Locale>[locale],
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buildContent: (BuildContext context) => Localizations.override(
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context: context,
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child: Builder(
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builder: (BuildContext context) {
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// No StreamChatLocalizations are defined for the first
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// Localizations ancestor, so we should get the values from
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// the default one, i.e. the one created by WidgetsApp via
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// the LocalizationsDelegate provided by MaterialApp.
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return Text(
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StreamChatLocalizations.of(context)!.launchUrlError,
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);
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},
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),
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),
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);
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await tester.pumpWidget(buildLocaleFrame(const Locale('en', 'US')));
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expect(find.text('Cannot launch the url'), findsOneWidget);
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await tester.pumpWidget(buildLocaleFrame(const Locale('hi', 'IN')));
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expect(find.text('यूआरएल लॉन्च नहीं कर सकते'), findsOneWidget);
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},
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);
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testWidgets('Localizations.override widget with hardwired locale',
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(WidgetTester tester) async {
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Widget buildLocaleFrame(Locale locale) => buildFrame(
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locale: locale,
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buildContent: (BuildContext context) {
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return Localizations.override(
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context: context,
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locale: const Locale('en', 'US'),
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child: Builder(
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builder: (BuildContext context) {
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// No StreamChatLocalizations are defined for the first
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// Localizations ancestor, so we should get the values from
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// the default one, i.e. the one created by WidgetsApp via
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// the LocalizationsDelegate provided by MaterialApp.
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return Text(
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StreamChatLocalizations.of(context)!.launchUrlError,
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);
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},
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),
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);
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},
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);
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await tester.pumpWidget(buildLocaleFrame(const Locale('en', 'US')));
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expect(find.text('Cannot launch the url'), findsOneWidget);
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await tester.pumpWidget(buildLocaleFrame(const Locale('hi', 'IN')));
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expect(find.text('Cannot launch the url'), findsOneWidget);
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});
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testWidgets(
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'MaterialApp adds StreamChatLocalizations for additional languages',
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(WidgetTester tester) async {
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final Key textKey = UniqueKey();
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await tester.pumpWidget(buildFrame(
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delegates: <LocalizationsDelegate<StreamChatLocalizations>>[
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GlobalStreamChatLocalizations.delegate,
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const FooStreamChatLocalizationsDelegate(
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supportedLanguage: 'fr',
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launchUrlError: "Impossible de lancer l'url",
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),
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const FooStreamChatLocalizationsDelegate(
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supportedLanguage: 'de',
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launchUrlError: 'Kann die URL nicht starten',
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),
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],
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supportedLocales: const <Locale>[
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Locale('en'),
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Locale('hi'),
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Locale('fr'),
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Locale('de'),
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],
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buildContent: (BuildContext context) => Text(
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StreamChatLocalizations.of(context)!.launchUrlError,
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key: textKey,
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),
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));
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expect(
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tester.widget<Text>(find.byKey(textKey)).data,
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'Cannot launch the url',
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);
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await tester.binding.setLocale('hi', 'IN');
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await tester.pump();
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expect(find.text('यूआरएल लॉन्च नहीं कर सकते'), findsOneWidget);
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await tester.binding.setLocale('fr', 'CA');
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await tester.pump();
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expect(find.text("Impossible de lancer l'url"), findsOneWidget);
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await tester.binding.setLocale('de', 'DE');
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await tester.pump();
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expect(find.text('Kann die URL nicht starten'), findsOneWidget);
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},
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);
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testWidgets(
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'MaterialApp overrides MaterialLocalizations for all locales',
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(WidgetTester tester) async {
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final Key textKey = UniqueKey();
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await tester.pumpWidget(buildFrame(
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// Accept whatever locale we're given
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localeResolutionCallback:
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(Locale? locale, Iterable<Locale> supportedLocales) => locale,
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delegates: <FooStreamChatLocalizationsDelegate>[
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const FooStreamChatLocalizationsDelegate(
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supportedLanguage: 'allLanguages',
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),
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],
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buildContent: (BuildContext context) {
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// Should always be 'foo', no matter what the locale is
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return Text(
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StreamChatLocalizations.of(context)!.launchUrlError,
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key: textKey,
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);
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},
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));
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expect(tester.widget<Text>(find.byKey(textKey)).data, 'foo');
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await tester.binding.setLocale('zh', 'CN');
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await tester.pump();
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expect(find.text('foo'), findsOneWidget);
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await tester.binding.setLocale('de', 'DE');
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await tester.pump();
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expect(find.text('foo'), findsOneWidget);
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},
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);
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testWidgets(
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'MaterialApp overrides MaterialLocalizations for default locale',
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(WidgetTester tester) async {
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final Key textKey = UniqueKey();
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await tester.pumpWidget(buildFrame(
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delegates: <FooStreamChatLocalizationsDelegate>[
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const FooStreamChatLocalizationsDelegate(),
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],
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// supportedLocales not specified, so all locales resolve to 'en'
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buildContent: (BuildContext context) => Text(
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StreamChatLocalizations.of(context)!.launchUrlError,
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key: textKey,
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),
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));
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// Unsupported locale '_' (the widget tester's default) resolves to 'en'.
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expect(tester.widget<Text>(find.byKey(textKey)).data, 'foo');
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// Unsupported locale 'zh' resolves to 'en'.
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await tester.binding.setLocale('zh', 'CN');
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await tester.pump();
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expect(find.text('foo'), findsOneWidget);
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// Unsupported locale 'de' resolves to 'en'.
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await tester.binding.setLocale('de', 'DE');
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await tester.pump();
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expect(find.text('foo'), findsOneWidget);
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},
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);
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}
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