| // 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 'package:meta/meta.dart'; |
| |
| import 'semantics_tester.dart'; |
| |
| void main() { |
| testWidgets('can change semantics in a branch blocked by BlockSemantics', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| |
| final TestSemantics expectedSemantics = TestSemantics.root( |
| children: <TestSemantics>[ |
| TestSemantics.rootChild( |
| id: 1, |
| label: 'hello', |
| textDirection: TextDirection.ltr, |
| rect: TestSemantics.fullScreen, |
| ), |
| ], |
| ); |
| |
| await tester.pumpWidget(buildWidget( |
| blockedText: 'one', |
| )); |
| |
| expect(semantics, hasSemantics(expectedSemantics)); |
| |
| // The purpose of the test is to ensure that this change does not throw. |
| await tester.pumpWidget(buildWidget( |
| blockedText: 'two', |
| )); |
| |
| expect(semantics, hasSemantics(expectedSemantics)); |
| |
| // Ensure that the previously blocked semantics end up in the tree correctly when unblocked. |
| await tester.pumpWidget(buildWidget( |
| blockedText: 'two', |
| blocking: false, |
| )); |
| expect(semantics, includesNodeWith(label: 'two', textDirection: TextDirection.ltr)); |
| |
| semantics.dispose(); |
| }); |
| } |
| |
| Widget buildWidget({ @required String blockedText, bool blocking = true }) { |
| assert(blockedText != null); |
| return Directionality( |
| textDirection: TextDirection.ltr, |
| child: Stack( |
| fit: StackFit.expand, |
| children: <Widget>[ |
| Semantics( |
| container: true, |
| child: ListView( |
| children: <Widget>[ |
| Text(blockedText), |
| ], |
| ), |
| ), |
| BlockSemantics( |
| blocking: blocking, |
| child: Semantics( |
| label: 'hello', |
| container: true, |
| ), |
| ), |
| ], |
| ), |
| ); |
| } |