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// 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:html' as html;
import 'package:flutter/foundation.dart';
import 'package:flutter/widgets.dart';
import 'package:meta/dart2js.dart';
// Tests that the framework prints stack traces in all build modes.
//
// Regression test for https://github.com/flutter/flutter/issues/68616.
//
// See also `dev/integration_tests/web/lib/stack_trace.dart` that tests the
// framework's ability to parse stack traces in all build modes.
Future<void> main() async {
final StringBuffer errorMessage = StringBuffer();
debugPrint = (String? message, { int? wrapWidth }) {
errorMessage.writeln(message);
};
runApp(const ThrowingWidget());
// Let the framework flush error messages.
await Future<void>.delayed(Duration.zero);
final StringBuffer output = StringBuffer();
if (_errorMessageFormattedCorrectly(errorMessage.toString())) {
output.writeln('--- TEST SUCCEEDED ---');
} else {
output.writeln('--- UNEXPECTED ERROR MESSAGE FORMAT ---');
output.writeln(errorMessage);
output.writeln('--- TEST FAILED ---');
}
print(output);
html.HttpRequest.request(
'/test-result',
method: 'POST',
sendData: '$output',
);
}
bool _errorMessageFormattedCorrectly(String errorMessage) {
if (!errorMessage.contains('Test error message')) {
return false;
}
// In release mode symbols are minified. No sense testing the contents of the stack trace.
if (kReleaseMode) {
return true;
}
const List<String> expectedFunctions = <String>[
'topLevelFunction',
'secondLevelFunction',
'thirdLevelFunction',
];
return expectedFunctions.every(errorMessage.contains);
}
class ThrowingWidget extends StatefulWidget {
const ThrowingWidget({super.key});
@override
State<ThrowingWidget> createState() => _ThrowingWidgetState();
}
class _ThrowingWidgetState extends State<ThrowingWidget> {
@override
void initState() {
super.initState();
topLevelFunction();
}
@override
Widget build(BuildContext context) {
return Container();
}
}
@noInline
void topLevelFunction() {
secondLevelFunction();
}
@noInline
void secondLevelFunction() {
thirdLevelFunction();
}
@noInline
void thirdLevelFunction() {
throw Exception('Test error message');
}