flutter_flutter/packages/flutter/test/rendering/relayout_boundary_test.dart
Michael Goderbauer 5491c8c146
Auto-format Framework (#160545)
This auto-formats all *.dart files in the repository outside of the
`engine` subdirectory and enforces that these files stay formatted with
a presubmit check.

**Reviewers:** Please carefully review all the commits except for the
one titled "formatted". The "formatted" commit was auto-generated by
running `dev/tools/format.sh -a -f`. The other commits were hand-crafted
to prepare the repo for the formatting change. I recommend reviewing the
commits one-by-one via the "Commits" tab and avoiding Github's "Files
changed" tab as it will likely slow down your browser because of the
size of this PR.

---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

47 lines
1.3 KiB
Dart

// 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/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('relayout boundary change does not trigger relayout', (WidgetTester tester) async {
final RenderLayoutCount renderLayoutCount = RenderLayoutCount();
final Widget layoutCounter = Center(
key: GlobalKey(),
child: WidgetToRenderBoxAdapter(renderBox: renderLayoutCount),
);
await tester.pumpWidget(
Center(
child: SizedBox(
width: 100,
height: 100,
child: Center(
child: SizedBox(width: 100, height: 100, child: Center(child: layoutCounter)),
),
),
),
);
expect(renderLayoutCount.layoutCount, 1);
await tester.pumpWidget(Center(child: SizedBox(width: 100, height: 100, child: layoutCounter)));
expect(renderLayoutCount.layoutCount, 1);
});
}
// This class is needed because LayoutBuilder's RenderObject does not always
// call the builder method in its PerformLayout method.
class RenderLayoutCount extends RenderBox {
int layoutCount = 0;
@override
void performLayout() {
layoutCount += 1;
size = constraints.biggest;
}
}