Testing localized widgets can fail when assets are too big due to race condition #22193
Description
Fix: #22193 (comment)
I've found a LINK with exact same question but didn't help.
Could you write some examples of testing localized widgets?
Below is what I've tried.
testWidgets('Sample Widget', (WidgetTester tester) async {
// Create the Widget tell the tester to build it
await tester.pumpWidget(Localizations(
delegates: [
const LocalizationDelegate(),
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate
],
locale: Locale('en'),
child: Sample(sample: 'test'),
));
await tester.pumpAndSettle();
expect(find.text('test'), findsOneWidget);
expect(find.text('1'), findsNothing);
// Tap the '+' icon and trigger a frame.
// await tester.tap(find.byIcon(Icons.add));
// await tester.pump();
});Result
➜ dooboo git:(master) ✗ flutter test test/widgets/sample.dart
00:07 +0: Sample Widget
locale: en
languageCode: en
══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following TestFailure object was thrown running a test:
Expected: exactly one matching node in the widget tree
Actual: ?:<zero widgets with text "test" (ignoring offstage widgets)>
Which: means none were found but one was expected
When the exception was thrown, this was the stack:
#4 main.<anonymous closure> (file:///Users/hyochan/Documents/SourceCode/FlutterProjects/dooboo/test/widgets/sample.dart:29:5)
<asynchronous suspension>
#5 testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:72:23)
#6 TestWidgetsFlutterBinding._runTestBody (package:flutter_test/src/binding.dart:559:19)
<asynchronous suspension>
#9 TestWidgetsFlutterBinding._runTest (package:flutter_test/src/binding.dart:543:14)
#10 AutomatedTestWidgetsFlutterBinding.runTest.<anonymous closure> (package:flutter_test/src/binding.dart:887:24)
#16 AutomatedTestWidgetsFlutterBinding.runTest (package:flutter_test/src/binding.dart:884:15)
#17 testWidgets.<anonymous closure> (package:flutter_test/src/widget_tester.dart:71:22)
flutter doctor
[✓] Flutter (Channel beta, v0.7.3, on Mac OS X 10.14 18A384a, locale en-KR)
[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
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[✓] Android Studio (version 3.1)
[!] VS Code (version 1.27.2)
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! Doctor found issues in 3 categories.