| // 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'; |
| |
| class TestParentData { |
| TestParentData({ this.top, this.right, this.bottom, this.left }); |
| |
| final double top; |
| final double right; |
| final double bottom; |
| final double left; |
| } |
| |
| void checkTree(WidgetTester tester, List<TestParentData> expectedParentData) { |
| 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 (TestParentData expected in expectedParentData) { |
| expect(child is RenderDecoratedBox, isTrue); |
| final RenderDecoratedBox decoratedBox = child; |
| expect(decoratedBox.parentData is StackParentData, isTrue); |
| final StackParentData parentData = decoratedBox.parentData; |
| expect(parentData.top, equals(expected.top)); |
| expect(parentData.right, equals(expected.right)); |
| expect(parentData.bottom, equals(expected.bottom)); |
| expect(parentData.left, equals(expected.left)); |
| final StackParentData decoratedBoxParentData = decoratedBox.parentData; |
| child = decoratedBoxParentData.nextSibling; |
| } |
| expect(child, isNull); |
| } catch (e) { |
| print(renderObject.toStringDeep()); |
| rethrow; |
| } |
| } |
| |
| final TestParentData kNonPositioned = TestParentData(); |
| |
| void main() { |
| testWidgets('ParentDataWidget control test', (WidgetTester tester) async { |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: const <Widget>[ |
| DecoratedBox(decoration: kBoxDecorationA), |
| Positioned( |
| top: 10.0, |
| left: 10.0, |
| child: DecoratedBox(decoration: kBoxDecorationB), |
| ), |
| DecoratedBox(decoration: kBoxDecorationC), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| kNonPositioned, |
| TestParentData(top: 10.0, left: 10.0), |
| kNonPositioned, |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: const <Widget>[ |
| Positioned( |
| bottom: 5.0, |
| right: 7.0, |
| child: DecoratedBox(decoration: kBoxDecorationA), |
| ), |
| Positioned( |
| top: 10.0, |
| left: 10.0, |
| child: DecoratedBox(decoration: kBoxDecorationB), |
| ), |
| DecoratedBox(decoration: kBoxDecorationC), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(bottom: 5.0, right: 7.0), |
| TestParentData(top: 10.0, left: 10.0), |
| kNonPositioned, |
| ]); |
| |
| const DecoratedBox kDecoratedBoxA = DecoratedBox(decoration: kBoxDecorationA); |
| const DecoratedBox kDecoratedBoxB = DecoratedBox(decoration: kBoxDecorationB); |
| const DecoratedBox kDecoratedBoxC = DecoratedBox(decoration: kBoxDecorationC); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: const <Widget>[ |
| Positioned( |
| bottom: 5.0, |
| right: 7.0, |
| child: kDecoratedBoxA, |
| ), |
| Positioned( |
| top: 10.0, |
| left: 10.0, |
| child: kDecoratedBoxB, |
| ), |
| kDecoratedBoxC, |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(bottom: 5.0, right: 7.0), |
| TestParentData(top: 10.0, left: 10.0), |
| kNonPositioned, |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: const <Widget>[ |
| Positioned( |
| bottom: 6.0, |
| right: 8.0, |
| child: kDecoratedBoxA, |
| ), |
| Positioned( |
| left: 10.0, |
| right: 10.0, |
| child: kDecoratedBoxB, |
| ), |
| kDecoratedBoxC, |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(bottom: 6.0, right: 8.0), |
| TestParentData(left: 10.0, right: 10.0), |
| kNonPositioned, |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: <Widget>[ |
| kDecoratedBoxA, |
| Positioned( |
| left: 11.0, |
| right: 12.0, |
| child: Container(child: kDecoratedBoxB), |
| ), |
| kDecoratedBoxC, |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| kNonPositioned, |
| TestParentData(left: 11.0, right: 12.0), |
| kNonPositioned, |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: <Widget>[ |
| kDecoratedBoxA, |
| Positioned( |
| right: 10.0, |
| child: Container(child: kDecoratedBoxB), |
| ), |
| Container( |
| child: const Positioned( |
| top: 8.0, |
| child: kDecoratedBoxC, |
| ), |
| ), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| kNonPositioned, |
| TestParentData(right: 10.0), |
| TestParentData(top: 8.0), |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: const <Widget>[ |
| Positioned( |
| right: 10.0, |
| child: FlipWidget(left: kDecoratedBoxA, right: kDecoratedBoxB), |
| ), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(right: 10.0), |
| ]); |
| |
| flipStatefulWidget(tester); |
| await tester.pump(); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(right: 10.0), |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: const <Widget>[ |
| Positioned( |
| top: 7.0, |
| child: FlipWidget(left: kDecoratedBoxA, right: kDecoratedBoxB), |
| ), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(top: 7.0), |
| ]); |
| |
| flipStatefulWidget(tester); |
| await tester.pump(); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(top: 7.0), |
| ]); |
| |
| await tester.pumpWidget( |
| Stack(textDirection: TextDirection.ltr) |
| ); |
| |
| checkTree(tester, <TestParentData>[]); |
| }); |
| |
| testWidgets('ParentDataWidget conflicting data', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: const <Widget>[ |
| Positioned( |
| top: 5.0, |
| bottom: 8.0, |
| child: Positioned( |
| top: 6.0, |
| left: 7.0, |
| child: DecoratedBox(decoration: kBoxDecorationB), |
| ), |
| ), |
| ], |
| ), |
| ); |
| expect(tester.takeException(), isFlutterError); |
| |
| await tester.pumpWidget(Stack(textDirection: TextDirection.ltr)); |
| |
| checkTree(tester, <TestParentData>[]); |
| |
| await tester.pumpWidget( |
| Container( |
| child: Row( |
| children: const <Widget>[ |
| Positioned( |
| top: 6.0, |
| left: 7.0, |
| child: DecoratedBox(decoration: kBoxDecorationB), |
| ), |
| ], |
| ), |
| ), |
| ); |
| expect(tester.takeException(), isFlutterError); |
| |
| await tester.pumpWidget( |
| Stack(textDirection: TextDirection.ltr) |
| ); |
| |
| checkTree(tester, <TestParentData>[]); |
| }); |
| |
| testWidgets('ParentDataWidget interacts with global keys', (WidgetTester tester) async { |
| final GlobalKey key = GlobalKey(); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: <Widget>[ |
| Positioned( |
| top: 10.0, |
| left: 10.0, |
| child: DecoratedBox(key: key, decoration: kBoxDecorationA), |
| ), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(top: 10.0, left: 10.0), |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: <Widget>[ |
| Positioned( |
| top: 10.0, |
| left: 10.0, |
| child: DecoratedBox( |
| decoration: kBoxDecorationB, |
| child: DecoratedBox(key: key, decoration: kBoxDecorationA), |
| ), |
| ), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(top: 10.0, left: 10.0), |
| ]); |
| |
| await tester.pumpWidget( |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: <Widget>[ |
| Positioned( |
| top: 10.0, |
| left: 10.0, |
| child: DecoratedBox(key: key, decoration: kBoxDecorationA), |
| ), |
| ], |
| ), |
| ); |
| |
| checkTree(tester, <TestParentData>[ |
| TestParentData(top: 10.0, left: 10.0), |
| ]); |
| }); |
| |
| testWidgets('Parent data invalid ancestor', (WidgetTester tester) async { |
| await tester.pumpWidget(Row( |
| children: <Widget>[ |
| Stack( |
| textDirection: TextDirection.ltr, |
| children: <Widget>[ |
| Expanded( |
| child: Container(), |
| ), |
| ], |
| ), |
| ], |
| )); |
| |
| expect(tester.takeException(), isFlutterError); |
| }); |
| } |