| // 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/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| testWidgets('Empty GridView', (WidgetTester tester) async { |
| final List<Widget> children = <Widget>[ |
| const DecoratedBox(decoration: BoxDecoration()), |
| const DecoratedBox(decoration: BoxDecoration()), |
| const DecoratedBox(decoration: BoxDecoration()), |
| const DecoratedBox(decoration: BoxDecoration()), |
| ]; |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: SizedBox( |
| width: 200.0, |
| child: GridView.extent( |
| maxCrossAxisExtent: 100.0, |
| shrinkWrap: true, |
| children: children, |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| expect(tester.renderObjectList<RenderBox>(find.byType(DecoratedBox)), hasLength(4)); |
| |
| for (final RenderBox box in tester.renderObjectList<RenderBox>(find.byType(DecoratedBox))) { |
| expect(box.size.width, equals(100.0), reason: 'child width'); |
| expect(box.size.height, equals(100.0), reason: 'child height'); |
| } |
| |
| final RenderBox grid = tester.renderObject(find.byType(GridView)); |
| expect(grid.size.width, equals(200.0), reason: 'grid width'); |
| expect(grid.size.height, equals(200.0), reason: 'grid height'); |
| |
| expect(grid.debugNeedsLayout, false); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: SizedBox( |
| width: 200.0, |
| child: GridView.extent( |
| maxCrossAxisExtent: 60.0, |
| shrinkWrap: true, |
| children: children, |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| for (final RenderBox box in tester.renderObjectList<RenderBox>(find.byType(DecoratedBox))) { |
| expect(box.size.width, equals(50.0), reason: 'child width'); |
| expect(box.size.height, equals(50.0), reason: 'child height'); |
| } |
| |
| expect(grid.size.width, equals(200.0), reason: 'grid width'); |
| expect(grid.size.height, equals(50.0), reason: 'grid height'); |
| }); |
| } |