| // 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'; |
| |
| void main() { |
| testWidgets('LayoutBuilder parent size', (WidgetTester tester) async { |
| Size layoutBuilderSize; |
| final Key childKey = new UniqueKey(); |
| final Key parentKey = new UniqueKey(); |
| |
| await tester.pumpWidget( |
| new Center( |
| child: new ConstrainedBox( |
| constraints: const BoxConstraints(maxWidth: 100.0, maxHeight: 200.0), |
| child: new LayoutBuilder( |
| key: parentKey, |
| builder: (BuildContext context, BoxConstraints constraints) { |
| layoutBuilderSize = constraints.biggest; |
| return new SizedBox( |
| key: childKey, |
| width: layoutBuilderSize.width / 2.0, |
| height: layoutBuilderSize.height / 2.0 |
| ); |
| } |
| ) |
| ) |
| ) |
| ); |
| |
| expect(layoutBuilderSize, const Size(100.0, 200.0)); |
| final RenderBox parentBox = tester.renderObject(find.byKey(parentKey)); |
| expect(parentBox.size, equals(const Size(50.0, 100.0))); |
| final RenderBox childBox = tester.renderObject(find.byKey(childKey)); |
| expect(childBox.size, equals(const Size(50.0, 100.0))); |
| }); |
| |
| testWidgets('LayoutBuilder stateful child', (WidgetTester tester) async { |
| Size layoutBuilderSize; |
| StateSetter setState; |
| final Key childKey = new UniqueKey(); |
| final Key parentKey = new UniqueKey(); |
| double childWidth = 10.0; |
| double childHeight = 20.0; |
| |
| await tester.pumpWidget( |
| new Center( |
| child: new LayoutBuilder( |
| key: parentKey, |
| builder: (BuildContext context, BoxConstraints constraints) { |
| layoutBuilderSize = constraints.biggest; |
| return new StatefulBuilder( |
| builder: (BuildContext context, StateSetter setter) { |
| setState = setter; |
| return new SizedBox( |
| key: childKey, |
| width: childWidth, |
| height: childHeight |
| ); |
| } |
| ); |
| } |
| ) |
| ) |
| ); |
| |
| expect(layoutBuilderSize, equals(const Size(800.0, 600.0))); |
| RenderBox parentBox = tester.renderObject(find.byKey(parentKey)); |
| expect(parentBox.size, equals(const Size(10.0, 20.0))); |
| RenderBox childBox = tester.renderObject(find.byKey(childKey)); |
| expect(childBox.size, equals(const Size(10.0, 20.0))); |
| |
| setState(() { |
| childWidth = 100.0; |
| childHeight = 200.0; |
| }); |
| await tester.pump(); |
| parentBox = tester.renderObject(find.byKey(parentKey)); |
| expect(parentBox.size, equals(const Size(100.0, 200.0))); |
| childBox = tester.renderObject(find.byKey(childKey)); |
| expect(childBox.size, equals(const Size(100.0, 200.0))); |
| }); |
| |
| testWidgets('LayoutBuilder stateful parent', (WidgetTester tester) async { |
| Size layoutBuilderSize; |
| StateSetter setState; |
| final Key childKey = new UniqueKey(); |
| double childWidth = 10.0; |
| double childHeight = 20.0; |
| |
| await tester.pumpWidget( |
| new Center( |
| child: new StatefulBuilder( |
| builder: (BuildContext context, StateSetter setter) { |
| setState = setter; |
| return new SizedBox( |
| width: childWidth, |
| height: childHeight, |
| child: new LayoutBuilder( |
| builder: (BuildContext context, BoxConstraints constraints) { |
| layoutBuilderSize = constraints.biggest; |
| return new SizedBox( |
| key: childKey, |
| width: layoutBuilderSize.width, |
| height: layoutBuilderSize.height |
| ); |
| } |
| ) |
| ); |
| } |
| ) |
| ) |
| ); |
| |
| expect(layoutBuilderSize, equals(const Size(10.0, 20.0))); |
| RenderBox box = tester.renderObject(find.byKey(childKey)); |
| expect(box.size, equals(const Size(10.0, 20.0))); |
| |
| setState(() { |
| childWidth = 100.0; |
| childHeight = 200.0; |
| }); |
| await tester.pump(); |
| box = tester.renderObject(find.byKey(childKey)); |
| expect(box.size, equals(const Size(100.0, 200.0))); |
| }); |
| |
| |
| testWidgets('LayoutBuilder and Inherited -- do not rebuild when not using inherited', (WidgetTester tester) async { |
| int built = 0; |
| final Widget target = new LayoutBuilder( |
| builder: (BuildContext context, BoxConstraints constraints) { |
| built += 1; |
| return new Container(); |
| } |
| ); |
| expect(built, 0); |
| |
| await tester.pumpWidget(new MediaQuery( |
| data: const MediaQueryData(size: const Size(400.0, 300.0)), |
| child: target |
| )); |
| expect(built, 1); |
| |
| await tester.pumpWidget(new MediaQuery( |
| data: const MediaQueryData(size: const Size(300.0, 400.0)), |
| child: target |
| )); |
| expect(built, 1); |
| }); |
| |
| testWidgets('LayoutBuilder and Inherited -- do rebuild when using inherited', (WidgetTester tester) async { |
| int built = 0; |
| final Widget target = new LayoutBuilder( |
| builder: (BuildContext context, BoxConstraints constraints) { |
| built += 1; |
| MediaQuery.of(context); |
| return new Container(); |
| } |
| ); |
| expect(built, 0); |
| |
| await tester.pumpWidget(new MediaQuery( |
| data: const MediaQueryData(size: const Size(400.0, 300.0)), |
| child: target |
| )); |
| expect(built, 1); |
| |
| await tester.pumpWidget(new MediaQuery( |
| data: const MediaQueryData(size: const Size(300.0, 400.0)), |
| child: target |
| )); |
| expect(built, 2); |
| }); |
| } |