73 lines
3.0 KiB
Dart
73 lines
3.0 KiB
Dart
// Copyright 2014 The Flutter 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:flutter_test/flutter_test.dart';
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import 'rendering_tester.dart';
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void main() {
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TestRenderingFlutterBinding.ensureInitialized();
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// Create non-const instances, otherwise tests pass even if the
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// operator override is incorrect.
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ViewConfiguration createViewConfiguration({
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Size size = const Size(20, 20),
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double devicePixelRatio = 2.0,
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}) {
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return ViewConfiguration(size: size, devicePixelRatio: devicePixelRatio);
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}
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group('RenderView', () {
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test('accounts for device pixel ratio in paintBounds', () {
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layout(RenderAspectRatio(aspectRatio: 1.0));
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pumpFrame();
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final Size logicalSize = TestRenderingFlutterBinding.instance.renderView.configuration.size;
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final double devicePixelRatio = TestRenderingFlutterBinding.instance.renderView.configuration.devicePixelRatio;
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final Size physicalSize = logicalSize * devicePixelRatio;
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expect(TestRenderingFlutterBinding.instance.renderView.paintBounds, Offset.zero & physicalSize);
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});
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test('does not replace the root layer unnecessarily', () {
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final RenderView view = RenderView(
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configuration: createViewConfiguration(),
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view: RendererBinding.instance.platformDispatcher.views.single,
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);
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final PipelineOwner owner = PipelineOwner();
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view.attach(owner);
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view.prepareInitialFrame();
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final ContainerLayer firstLayer = view.debugLayer!;
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view.configuration = createViewConfiguration();
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expect(identical(view.debugLayer, firstLayer), true);
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view.configuration = createViewConfiguration(devicePixelRatio: 5.0);
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expect(identical(view.debugLayer, firstLayer), false);
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});
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test('does not replace the root layer unnecessarily when view resizes', () {
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final RenderView view = RenderView(
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configuration: createViewConfiguration(size: const Size(100.0, 100.0)),
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view: RendererBinding.instance.platformDispatcher.views.single,
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);
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final PipelineOwner owner = PipelineOwner();
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view.attach(owner);
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view.prepareInitialFrame();
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final ContainerLayer firstLayer = view.debugLayer!;
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view.configuration = createViewConfiguration(size: const Size(100.0, 1117.0));
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expect(identical(view.debugLayer, firstLayer), true);
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});
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});
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test('ViewConfiguration == and hashCode', () {
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final ViewConfiguration viewConfigurationA = createViewConfiguration();
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final ViewConfiguration viewConfigurationB = createViewConfiguration();
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final ViewConfiguration viewConfigurationC = createViewConfiguration(devicePixelRatio: 3.0);
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expect(viewConfigurationA == viewConfigurationB, true);
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expect(viewConfigurationA != viewConfigurationC, true);
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expect(viewConfigurationA.hashCode, viewConfigurationB.hashCode);
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expect(viewConfigurationA.hashCode != viewConfigurationC.hashCode, true);
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});
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}
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