blob: 9ff67fb8270ec7837f03112c2403db678d9f487f [file] [log] [blame]
// 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,
),
),
],
),
);
}