// Copyright 2015 The Chromium 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_test/flutter_test.dart'; import 'package:flutter/rendering.dart'; import 'package:flutter/widgets.dart'; final Border nullBorder = null; // we want these instances to be separate instances so that we're not just checking with a single object final BoxDecoration kBoxDecorationA = new BoxDecoration(border: nullBorder); final BoxDecoration kBoxDecorationB = new BoxDecoration(border: nullBorder); final BoxDecoration kBoxDecorationC = new BoxDecoration(border: nullBorder); class TestWidget extends StatelessWidget { const TestWidget({ this.child }); final Widget child; @override Widget build(BuildContext context) => child; } class TestOrientedBox extends SingleChildRenderObjectWidget { TestOrientedBox({ Key key, Widget child }) : super(key: key, child: child); Decoration _getDecoration(BuildContext context) { Orientation orientation = MediaQuery.of(context).orientation; switch (orientation) { case Orientation.landscape: return const BoxDecoration(backgroundColor: const Color(0xFF00FF00)); case Orientation.portrait: return const BoxDecoration(backgroundColor: const Color(0xFF0000FF)); } assert(orientation != null); return null; } @override RenderDecoratedBox createRenderObject(BuildContext context) => new RenderDecoratedBox(decoration: _getDecoration(context)); @override void updateRenderObject(BuildContext context, RenderDecoratedBox renderObject) { renderObject.decoration = _getDecoration(context); } } void main() { testWidgets('RenderObjectWidget smoke test', (WidgetTester tester) async { await tester.pumpWidget(new DecoratedBox(decoration: kBoxDecorationA)); SingleChildRenderObjectElement element = tester.element(find.byElementType(SingleChildRenderObjectElement)); expect(element, isNotNull); expect(element.renderObject is RenderDecoratedBox, isTrue); RenderDecoratedBox renderObject = element.renderObject; expect(renderObject.decoration, equals(kBoxDecorationA)); expect(renderObject.position, equals(DecorationPosition.background)); await tester.pumpWidget(new DecoratedBox(decoration: kBoxDecorationB)); element = tester.element(find.byElementType(SingleChildRenderObjectElement)); expect(element, isNotNull); expect(element.renderObject is RenderDecoratedBox, isTrue); renderObject = element.renderObject; expect(renderObject.decoration, equals(kBoxDecorationB)); expect(renderObject.position, equals(DecorationPosition.background)); }); testWidgets('RenderObjectWidget can add and remove children', (WidgetTester tester) async { void checkFullTree() { SingleChildRenderObjectElement element = tester.firstElement(find.byElementType(SingleChildRenderObjectElement)); expect(element, isNotNull); expect(element.renderObject is RenderDecoratedBox, isTrue); RenderDecoratedBox renderObject = element.renderObject; expect(renderObject.decoration, equals(kBoxDecorationA)); expect(renderObject.position, equals(DecorationPosition.background)); expect(renderObject.child, isNotNull); expect(renderObject.child is RenderDecoratedBox, isTrue); RenderDecoratedBox child = renderObject.child; expect(child.decoration, equals(kBoxDecorationB)); expect(child.position, equals(DecorationPosition.background)); expect(child.child, isNull); } void childBareTree() { SingleChildRenderObjectElement element = tester.element(find.byElementType(SingleChildRenderObjectElement)); expect(element, isNotNull); expect(element.renderObject is RenderDecoratedBox, isTrue); RenderDecoratedBox renderObject = element.renderObject; expect(renderObject.decoration, equals(kBoxDecorationA)); expect(renderObject.position, equals(DecorationPosition.background)); expect(renderObject.child, isNull); } await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA, child: new DecoratedBox( decoration: kBoxDecorationB ) )); checkFullTree(); await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA, child: new TestWidget( child: new DecoratedBox( decoration: kBoxDecorationB ) ) )); checkFullTree(); await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA, child: new DecoratedBox( decoration: kBoxDecorationB ) )); checkFullTree(); await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA )); childBareTree(); await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA, child: new TestWidget( child: new TestWidget( child: new DecoratedBox( decoration: kBoxDecorationB ) ) ) )); checkFullTree(); await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA )); childBareTree(); }); testWidgets('Detached render tree is intact', (WidgetTester tester) async { await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA, child: new DecoratedBox( decoration: kBoxDecorationB, child: new DecoratedBox( decoration: kBoxDecorationC ) ) )); SingleChildRenderObjectElement element = tester.firstElement(find.byElementType(SingleChildRenderObjectElement)); expect(element.renderObject is RenderDecoratedBox, isTrue); RenderDecoratedBox parent = element.renderObject; expect(parent.child is RenderDecoratedBox, isTrue); RenderDecoratedBox child = parent.child; expect(child.decoration, equals(kBoxDecorationB)); expect(child.child is RenderDecoratedBox, isTrue); RenderDecoratedBox grandChild = child.child; expect(grandChild.decoration, equals(kBoxDecorationC)); expect(grandChild.child, isNull); await tester.pumpWidget(new DecoratedBox( decoration: kBoxDecorationA )); element = tester.element(find.byElementType(SingleChildRenderObjectElement)); expect(element.renderObject is RenderDecoratedBox, isTrue); expect(element.renderObject, equals(parent)); expect(parent.child, isNull); expect(child.parent, isNull); expect(child.decoration, equals(kBoxDecorationB)); expect(child.child, equals(grandChild)); expect(grandChild.parent, equals(child)); expect(grandChild.decoration, equals(kBoxDecorationC)); expect(grandChild.child, isNull); }); testWidgets('Can watch inherited widgets', (WidgetTester tester) async { Key boxKey = new UniqueKey(); TestOrientedBox box = new TestOrientedBox(key: boxKey); await tester.pumpWidget(new MediaQuery( data: const MediaQueryData(size: const Size(400.0, 300.0)), child: box )); RenderDecoratedBox renderBox = tester.renderObject(find.byKey(boxKey)); BoxDecoration decoration = renderBox.decoration; expect(decoration.backgroundColor, equals(const Color(0xFF00FF00))); await tester.pumpWidget(new MediaQuery( data: const MediaQueryData(size: const Size(300.0, 400.0)), child: box )); decoration = renderBox.decoration; expect(decoration.backgroundColor, equals(const Color(0xFF0000FF))); }); }