78 lines
2.2 KiB
Dart
78 lines
2.2 KiB
Dart
// Copyright 2017 The Chromium 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/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:meta/meta.dart';
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import 'semantics_tester.dart';
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void main() {
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testWidgets('can change semantics in a branch blocked by BlockSemantics', (WidgetTester tester) async {
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final SemanticsTester semantics = new SemanticsTester(tester);
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final TestSemantics expectedSemantics = new TestSemantics.root(
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children: <TestSemantics>[
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new TestSemantics.rootChild(
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id: 1,
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label: 'hello',
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textDirection: TextDirection.ltr,
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rect: TestSemantics.fullScreen,
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)
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],
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);
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await tester.pumpWidget(buildWidget(
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blockedText: 'one',
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));
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expect(semantics, hasSemantics(expectedSemantics));
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// The purpose of the test is to ensure that this change does not throw.
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await tester.pumpWidget(buildWidget(
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blockedText: 'two',
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));
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expect(semantics, hasSemantics(expectedSemantics));
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// Ensure that the previously blocked semantics end up in the tree correctly when unblocked.
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await tester.pumpWidget(buildWidget(
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blockedText: 'two',
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blocking: false,
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));
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expect(semantics, includesNodeWith(label: 'two', textDirection: TextDirection.ltr));
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semantics.dispose();
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});
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}
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Widget buildWidget({ @required String blockedText, bool blocking = true }) {
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assert(blockedText != null);
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return new Directionality(
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textDirection: TextDirection.ltr,
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child: new Stack(
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fit: StackFit.expand,
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children: <Widget>[
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new Semantics(
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container: true,
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child: new ListView(
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children: <Widget>[
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new Text(blockedText),
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],
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),
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),
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new BlockSemantics(
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blocking: blocking,
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child: new Semantics(
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label: 'hello',
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container: true,
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),
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),
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]
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),
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);
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}
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