// 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'; import 'test_widgets.dart'; void checkTree(WidgetTester tester, List<BoxDecoration> expectedDecorations) { final MultiChildRenderObjectElement element = tester.element(find.byElementPredicate( (Element element) => element is MultiChildRenderObjectElement )); expect(element, isNotNull); expect(element.renderObject is RenderStack, isTrue); final RenderStack renderObject = element.renderObject; try { RenderObject child = renderObject.firstChild; for (BoxDecoration decoration in expectedDecorations) { expect(child is RenderDecoratedBox, isTrue); final RenderDecoratedBox decoratedBox = child; expect(decoratedBox.decoration, equals(decoration)); final StackParentData decoratedBoxParentData = decoratedBox.parentData; child = decoratedBoxParentData.nextSibling; } expect(child, isNull); } catch (e) { print(renderObject.toStringDeep()); rethrow; } } void main() { testWidgets('MultiChildRenderObjectElement control test', (WidgetTester tester) async { await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationA), new DecoratedBox(decoration: kBoxDecorationB), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationB, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationA), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationA), new DecoratedBox(key: const Key('b'), decoration: kBoxDecorationB), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationB, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(key: const Key('b'), decoration: kBoxDecorationB), new DecoratedBox(decoration: kBoxDecorationC), new DecoratedBox(key: const Key('a'), decoration: kBoxDecorationA), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationB, kBoxDecorationC, kBoxDecorationA]); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(key: const Key('a'), decoration: kBoxDecorationA), new DecoratedBox(decoration: kBoxDecorationC), new DecoratedBox(key: const Key('b'), decoration: kBoxDecorationB), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationC, kBoxDecorationB]); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationC]); await tester.pumpWidget( new Stack() ); checkTree(tester, <BoxDecoration>[]); }); testWidgets('MultiChildRenderObjectElement with stateless widgets', (WidgetTester tester) async { await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationA), new DecoratedBox(decoration: kBoxDecorationB), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationB, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationA), new Container( child: new DecoratedBox(decoration: kBoxDecorationB) ), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationB, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationA), new Container( child: new Container( child: new DecoratedBox(decoration: kBoxDecorationB) ) ), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationB, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new Container( child: new Container( child: new DecoratedBox(decoration: kBoxDecorationB) ) ), new Container( child: new DecoratedBox(decoration: kBoxDecorationA) ), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationB, kBoxDecorationA, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new Container( child: new DecoratedBox(decoration: kBoxDecorationB) ), new Container( child: new DecoratedBox(decoration: kBoxDecorationA) ), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationB, kBoxDecorationA, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new Container( key: const Key('b'), child: new DecoratedBox(decoration: kBoxDecorationB) ), new Container( key: const Key('a'), child: new DecoratedBox(decoration: kBoxDecorationA) ), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationB, kBoxDecorationA]); await tester.pumpWidget( new Stack( children: <Widget>[ new Container( key: const Key('a'), child: new DecoratedBox(decoration: kBoxDecorationA) ), new Container( key: const Key('b'), child: new DecoratedBox(decoration: kBoxDecorationB) ), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationB]); await tester.pumpWidget( new Stack() ); checkTree(tester, <BoxDecoration>[]); }); testWidgets('MultiChildRenderObjectElement with stateful widgets', (WidgetTester tester) async { await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(decoration: kBoxDecorationA), new DecoratedBox(decoration: kBoxDecorationB), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationB]); await tester.pumpWidget( new Stack( children: <Widget>[ new FlipWidget( left: new DecoratedBox(decoration: kBoxDecorationA), right: new DecoratedBox(decoration: kBoxDecorationB) ), new DecoratedBox(decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationA, kBoxDecorationC]); flipStatefulWidget(tester); await tester.pump(); checkTree(tester, <BoxDecoration>[kBoxDecorationB, kBoxDecorationC]); await tester.pumpWidget( new Stack( children: <Widget>[ new FlipWidget( left: new DecoratedBox(decoration: kBoxDecorationA), right: new DecoratedBox(decoration: kBoxDecorationB) ), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationB]); flipStatefulWidget(tester); await tester.pump(); checkTree(tester, <BoxDecoration>[kBoxDecorationA]); await tester.pumpWidget( new Stack( children: <Widget>[ new FlipWidget( key: const Key('flip'), left: new DecoratedBox(decoration: kBoxDecorationA), right: new DecoratedBox(decoration: kBoxDecorationB) ), ] ) ); await tester.pumpWidget( new Stack( children: <Widget>[ new DecoratedBox(key: const Key('c'), decoration: kBoxDecorationC), new FlipWidget( key: const Key('flip'), left: new DecoratedBox(decoration: kBoxDecorationA), right: new DecoratedBox(decoration: kBoxDecorationB) ), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationC, kBoxDecorationA]); flipStatefulWidget(tester); await tester.pump(); checkTree(tester, <BoxDecoration>[kBoxDecorationC, kBoxDecorationB]); await tester.pumpWidget( new Stack( children: <Widget>[ new FlipWidget( key: const Key('flip'), left: new DecoratedBox(decoration: kBoxDecorationA), right: new DecoratedBox(decoration: kBoxDecorationB) ), new DecoratedBox(key: const Key('c'), decoration: kBoxDecorationC), ] ) ); checkTree(tester, <BoxDecoration>[kBoxDecorationB, kBoxDecorationC]); }); }