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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 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'semantics_tester.dart';
void main() {
testWidgets('can cease to be semantics boundary after markNeedsSemanticsUpdate() has already been called once', (WidgetTester tester) async {
final SemanticsTester semantics = SemanticsTester(tester);
await tester.pumpWidget(
buildTestWidgets(
excludeSemantics: false,
label: 'label',
isSemanticsBoundary: true,
),
);
// The following should not trigger an assert.
await tester.pumpWidget(
buildTestWidgets(
excludeSemantics: true,
label: 'label CHANGED',
isSemanticsBoundary: false,
),
);
semantics.dispose();
});
}
Widget buildTestWidgets({
required bool excludeSemantics,
required String label,
required bool isSemanticsBoundary,
}) {
return Directionality(
textDirection: TextDirection.ltr,
child: Semantics(
label: 'container',
container: true,
child: ExcludeSemantics(
excluding: excludeSemantics,
child: TestWidget(
label: label,
isSemanticBoundary: isSemanticsBoundary,
child: Column(
children: <Widget>[
Semantics(
label: 'child1',
),
Semantics(
label: 'child2',
),
],
),
),
),
),
);
}
class TestWidget extends SingleChildRenderObjectWidget {
const TestWidget({
super.key,
required Widget super.child,
required this.label,
required this.isSemanticBoundary,
});
final String label;
final bool isSemanticBoundary;
@override
RenderTest createRenderObject(BuildContext context) {
return RenderTest()
..label = label
..isSemanticBoundary = isSemanticBoundary;
}
@override
void updateRenderObject(BuildContext context, RenderTest renderObject) {
renderObject
..label = label
..isSemanticBoundary = isSemanticBoundary;
}
}
class RenderTest extends RenderProxyBox {
@override
void describeSemanticsConfiguration(SemanticsConfiguration config) {
super.describeSemanticsConfiguration(config);
if (!isSemanticBoundary) {
return;
}
config
..isSemanticBoundary = isSemanticBoundary
..label = label
..textDirection = TextDirection.ltr;
}
String get label => _label;
String _label = '<>';
set label(String value) {
if (value == _label) {
return;
}
_label = value;
markNeedsSemanticsUpdate();
}
bool get isSemanticBoundary => _isSemanticBoundary;
bool _isSemanticBoundary = false;
set isSemanticBoundary(bool value) {
if (_isSemanticBoundary == value) {
return;
}
_isSemanticBoundary = value;
markNeedsSemanticsUpdate();
}
}