Files
2019-08-13 20:38:46 +08:00

63 lines
1.9 KiB
Dart

// Copyright 2017 The Chromium 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:test/test.dart';
import 'package:flutter_web/material.dart';
import 'package:flutter_web/rendering.dart';
import 'package:flutter_web_ui/ui.dart';
void main() {
test('ensure frame is scheduled for markNeedsSemanticsUpdate', () {
final TestRenderObject renderObject = TestRenderObject();
int onNeedVisualUpdateCallCount = 0;
final PipelineOwner owner = PipelineOwner(onNeedVisualUpdate: () {
onNeedVisualUpdateCallCount += 1;
});
owner.ensureSemantics();
renderObject.attach(owner);
renderObject.layout(const BoxConstraints
.tightForFinite()); // semantics are only calculated if layout information is up to date.
owner.flushSemantics();
expect(onNeedVisualUpdateCallCount, 1);
renderObject.markNeedsSemanticsUpdate();
expect(onNeedVisualUpdateCallCount, 2);
});
test('detached RenderObject does not do semantics', () {
final TestRenderObject renderObject = TestRenderObject();
expect(renderObject.attached, isFalse);
expect(renderObject.describeSemanticsConfigurationCallCount, 0);
renderObject.markNeedsSemanticsUpdate();
expect(renderObject.describeSemanticsConfigurationCallCount, 0);
});
}
class TestRenderObject extends RenderObject {
@override
void debugAssertDoesMeetConstraints() {}
@override
Rect get paintBounds => null;
@override
void performLayout() {}
@override
void performResize() {}
@override
Rect get semanticBounds => Rect.fromLTWH(0.0, 0.0, 10.0, 20.0);
int describeSemanticsConfigurationCallCount = 0;
@override
void describeSemanticsConfiguration(SemanticsConfiguration config) {
super.describeSemanticsConfiguration(config);
config.isSemanticBoundary = true;
describeSemanticsConfigurationCallCount++;
}
}