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// 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 'mock_canvas.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,
);
}
}