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This auto-formats all *.dart files in the repository outside of the `engine` subdirectory and enforces that these files stay formatted with a presubmit check. **Reviewers:** Please carefully review all the commits except for the one titled "formatted". The "formatted" commit was auto-generated by running `dev/tools/format.sh -a -f`. The other commits were hand-crafted to prepare the repo for the formatting change. I recommend reviewing the commits one-by-one via the "Commits" tab and avoiding Github's "Files changed" tab as it will likely slow down your browser because of the size of this PR. --------- Co-authored-by: Kate Lovett <katelovett@google.com> Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
109 lines
3.5 KiB
Dart
109 lines
3.5 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 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
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void main() {
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testWidgets('ErrorWidget displays actual error when throwing during build', (
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WidgetTester tester,
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) async {
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final Key container = UniqueKey();
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const String errorText = 'Oh no, there was a crash!!1';
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await tester.pumpWidget(
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Container(
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key: container,
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color: Colors.red,
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padding: const EdgeInsets.all(10),
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child: Builder(
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builder: (BuildContext context) {
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throw UnsupportedError(errorText);
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},
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),
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),
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);
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expect(
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tester.takeException(),
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isA<UnsupportedError>().having(
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(UnsupportedError error) => error.message,
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'message',
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contains(errorText),
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),
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);
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final ErrorWidget errorWidget = tester.widget(find.byType(ErrorWidget));
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expect(errorWidget.message, contains(errorText));
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// Failure in one widget shouldn't ripple through the entire tree and effect
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// ancestors. Those should still be in the tree.
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expect(find.byKey(container), findsOneWidget);
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});
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testWidgets(
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'when constructing an ErrorWidget due to a build failure throws an error, fail gracefully',
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experimentalLeakTesting:
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LeakTesting.settings.withIgnoredAll(), // leaking by design because of exception
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(WidgetTester tester) async {
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final Key container = UniqueKey();
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await tester.pumpWidget(
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Container(
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key: container,
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color: Colors.red,
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padding: const EdgeInsets.all(10),
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// This widget throws during build, which causes the construction of an
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// ErrorWidget with the build error. However, during construction of
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// that ErrorWidget, another error is thrown.
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child: const MyDoubleThrowingWidget(),
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),
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);
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expect(
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tester.takeException(),
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isA<UnsupportedError>().having(
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(UnsupportedError error) => error.message,
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'message',
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contains(MyThrowingElement.debugFillPropertiesErrorMessage),
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),
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);
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final ErrorWidget errorWidget = tester.widget(find.byType(ErrorWidget));
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expect(errorWidget.message, contains(MyThrowingElement.debugFillPropertiesErrorMessage));
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// Failure in one widget shouldn't ripple through the entire tree and effect
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// ancestors. Those should still be in the tree.
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expect(find.byKey(container), findsOneWidget);
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},
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);
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}
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// This widget throws during its regular build and then again when the
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// ErrorWidget is constructed, which calls MyThrowingElement.debugFillProperties.
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class MyDoubleThrowingWidget extends StatelessWidget {
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const MyDoubleThrowingWidget({super.key});
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@override
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StatelessElement createElement() => MyThrowingElement(this);
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@override
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Widget build(BuildContext context) {
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throw UnsupportedError('You cannot build me!');
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}
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}
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class MyThrowingElement extends StatelessElement {
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MyThrowingElement(super.widget);
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static const String debugFillPropertiesErrorMessage = 'Crash during debugFillProperties';
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@override
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void debugFillProperties(DiagnosticPropertiesBuilder properties) {
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super.debugFillProperties(properties);
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throw UnsupportedError(debugFillPropertiesErrorMessage);
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}
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}
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