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Add test for image.error_builder.0.dart API example. (#148497)

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This PR contributes to https://github.com/flutter/flutter/issues/130459

### Description
- Adds tests for `examples/api/lib/widgets/image/image.error_builder.0.dart`
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Kostia Sokolovskyi 2024-05-20 18:11:20 +02:00 committed by GitHub
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commit 02a6c91e4d
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2 changed files with 49 additions and 1 deletions
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1
dev/bots/check_code_samples.dart
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@ -415,7 +415,6 @@ final Set<String> _knownMissingTests = <String>{
'examples/api/test/widgets/animated_list/animated_list.0_test.dart',
'examples/api/test/widgets/focus_traversal/focus_traversal_group.0_test.dart',
'examples/api/test/widgets/focus_traversal/ordered_traversal_policy.0_test.dart',
'examples/api/test/widgets/image/image.error_builder.0_test.dart',
'examples/api/test/widgets/image/image.frame_builder.0_test.dart',
'examples/api/test/widgets/image/image.loading_builder.0_test.dart',
'examples/api/test/widgets/shortcuts/logical_key_set.0_test.dart',

49
examples/api/test/widgets/image/image.error_builder.0_test.dart Normal file
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@ -0,0 +1,49 @@
// 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 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_api_samples/widgets/image/image.error_builder.0.dart'
as example;
import 'package:flutter_test/flutter_test.dart';
void main() {
// The app being tested loads images via HTTP which the test
// framework defeats by default.
setUpAll(() {
HttpOverrides.global = null;
});
testWidgets('Has nonexistent url', (WidgetTester tester) async {
await tester.pumpWidget(
const example.ErrorBuilderExampleApp(),
);
await tester.pumpAndSettle();
final Image image = tester.widget<Image>(find.byType(Image));
final NetworkImage imageProvider = image.image as NetworkImage;
expect(
imageProvider.url,
equals('https://example.does.not.exist/image.jpg'),
);
});
testWidgets('errorBuilder returns text with emoji', (WidgetTester tester) async {
await tester.pumpWidget(
const example.ErrorBuilderExampleApp(),
);
await tester.pumpAndSettle();
final Image image = tester.widget<Image>(find.byType(Image));
final ImageErrorWidgetBuilder errorBuilder = image.errorBuilder!;
final BuildContext context = tester.element(find.byType(Image));
expect(
errorBuilder(context, const HttpException('oops'), StackTrace.empty),
isA<Text>().having((Text text) => text.data, 'data', equals('😢')),
);
});
}