flutter_flutter/packages/flutter/test/widgets/grid_view_layout_test.dart
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---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

63 lines
2.1 KiB
Dart

// 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');
});
}