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1e207c0150
Previously this was used by MixedViewport, but now we don't need it because LazyBlockViewport has replaced MixedViewport. I've also taken this opportunity to modernize RenderBlock.
41 lines
1.1 KiB
Dart
41 lines
1.1 KiB
Dart
// Copyright 2015 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/rendering.dart';
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import 'package:test/test.dart';
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import 'rendering_tester.dart';
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class TestBlockPainter extends RenderObjectPainter {
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@override
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void paint(PaintingContext context, Offset offset) { }
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}
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void main() {
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test('overlay painters can attach and detach', () {
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TestBlockPainter first = new TestBlockPainter();
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TestBlockPainter second = new TestBlockPainter();
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RenderList list = new RenderList(overlayPainter: first);
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// The first painter isn't attached because we haven't attached block.
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expect(first.renderObject, isNull);
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expect(second.renderObject, isNull);
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list.overlayPainter = second;
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expect(first.renderObject, isNull);
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expect(second.renderObject, isNull);
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layout(list);
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expect(first.renderObject, isNull);
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expect(second.renderObject, equals(list));
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list.overlayPainter = first;
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expect(first.renderObject, equals(list));
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expect(second.renderObject, isNull);
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});
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}
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