// 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_test/flutter_test.dart'; import 'rendering_tester.dart'; void main() { TestRenderingFlutterBinding.ensureInitialized(); // Create non-const instances, otherwise tests pass even if the // operator override is incorrect. ViewConfiguration createViewConfiguration({ Size size = const Size(20, 20), double devicePixelRatio = 2.0, }) { return ViewConfiguration(size: size, devicePixelRatio: devicePixelRatio); } group('RenderView', () { test('accounts for device pixel ratio in paintBounds', () { layout(RenderAspectRatio(aspectRatio: 1.0)); pumpFrame(); final Size logicalSize = TestRenderingFlutterBinding.instance.renderView.configuration.size; final double devicePixelRatio = TestRenderingFlutterBinding.instance.renderView.configuration.devicePixelRatio; final Size physicalSize = logicalSize * devicePixelRatio; expect(TestRenderingFlutterBinding.instance.renderView.paintBounds, Offset.zero & physicalSize); }); test('does not replace the root layer unnecessarily', () { final RenderView view = RenderView( configuration: createViewConfiguration(), view: RendererBinding.instance.platformDispatcher.views.single, ); final PipelineOwner owner = PipelineOwner(); view.attach(owner); view.prepareInitialFrame(); final ContainerLayer firstLayer = view.debugLayer!; view.configuration = createViewConfiguration(); expect(identical(view.debugLayer, firstLayer), true); view.configuration = createViewConfiguration(devicePixelRatio: 5.0); expect(identical(view.debugLayer, firstLayer), false); }); test('does not replace the root layer unnecessarily when view resizes', () { final RenderView view = RenderView( configuration: createViewConfiguration(size: const Size(100.0, 100.0)), view: RendererBinding.instance.platformDispatcher.views.single, ); final PipelineOwner owner = PipelineOwner(); view.attach(owner); view.prepareInitialFrame(); final ContainerLayer firstLayer = view.debugLayer!; view.configuration = createViewConfiguration(size: const Size(100.0, 1117.0)); expect(identical(view.debugLayer, firstLayer), true); }); }); test('ViewConfiguration == and hashCode', () { final ViewConfiguration viewConfigurationA = createViewConfiguration(); final ViewConfiguration viewConfigurationB = createViewConfiguration(); final ViewConfiguration viewConfigurationC = createViewConfiguration(devicePixelRatio: 3.0); expect(viewConfigurationA == viewConfigurationB, true); expect(viewConfigurationA != viewConfigurationC, true); expect(viewConfigurationA.hashCode, viewConfigurationB.hashCode); expect(viewConfigurationA.hashCode != viewConfigurationC.hashCode, true); }); test('invokes DebugPaintCallback', () { final PaintPattern paintsOrangeRect = paints..rect( color: orange, rect: orangeRect, ); final PaintPattern paintsGreenRect = paints..rect( color: green, rect: greenRect, ); final PaintPattern paintOrangeAndGreenRect = paints ..rect( color: orange, rect: orangeRect, ) ..rect( color: green, rect: greenRect, ); void paintCallback(PaintingContext context, Offset offset, RenderView renderView) { context.canvas.drawRect( greenRect, Paint()..color = green, ); } layout(TestRenderObject()); expect( TestRenderingFlutterBinding.instance.renderView, paintsOrangeRect, ); expect( TestRenderingFlutterBinding.instance.renderView, isNot(paintsGreenRect), ); RenderView.debugAddPaintCallback(paintCallback); expect( TestRenderingFlutterBinding.instance.renderView, paintOrangeAndGreenRect, ); RenderView.debugRemovePaintCallback(paintCallback); expect( TestRenderingFlutterBinding.instance.renderView, paintsOrangeRect, ); expect( TestRenderingFlutterBinding.instance.renderView, isNot(paintsGreenRect), ); }); test('Config can be set and changed after instantiation without calling prepareInitialFrame first', () { final RenderView view = RenderView( view: RendererBinding.instance.platformDispatcher.views.single, ); view.configuration = const ViewConfiguration(size: Size(100, 200), devicePixelRatio: 3.0); view.configuration = const ViewConfiguration(size: Size(200, 300), devicePixelRatio: 2.0); PipelineOwner().rootNode = view; view.prepareInitialFrame(); }); } const Color orange = Color(0xFFFF9000); const Color green = Color(0xFF0FF900); const Rect orangeRect = Rect.fromLTWH(10, 10, 50, 75); const Rect greenRect = Rect.fromLTWH(20, 20, 100, 150); class TestRenderObject extends RenderBox { @override void performLayout() { size = constraints.biggest; } @override void paint(PaintingContext context, Offset offset) { context.canvas.drawRect( orangeRect, Paint()..color = orange, ); } }