flutter_flutter/packages/flutter/test/rendering/object_paint_dispose_test.dart
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---------

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

54 lines
1.6 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/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('Tracks picture layers accurately when painting is interleaved with a pushLayer', (
WidgetTester tester,
) async {
// Creates a RenderObject that will paint into multiple picture layers.
// Asserts that both layers get a handle, and that all layers get correctly
// released.
final GlobalKey key = GlobalKey();
await tester.pumpWidget(
RepaintBoundary(
child: CustomPaint(
key: key,
painter: SimplePainter(),
foregroundPainter: SimplePainter(),
child: const RepaintBoundary(child: Placeholder()),
),
),
);
final List<Layer> layers = tester.binding.renderView.debugLayer!.depthFirstIterateChildren();
final RenderObject renderObject = key.currentContext!.findRenderObject()!;
for (final Layer layer in layers) {
expect(layer.debugDisposed, false);
}
await tester.pumpWidget(const SizedBox());
for (final Layer layer in layers) {
expect(layer.debugDisposed, true);
}
expect(renderObject.debugDisposed, true);
});
}
class SimplePainter extends CustomPainter {
@override
void paint(Canvas canvas, Size size) {
canvas.drawPaint(Paint());
}
@override
bool shouldRepaint(SimplePainter oldDelegate) => true;
}