71 lines
2.2 KiB
Dart
71 lines
2.2 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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testWidgets('Empty GridView', (WidgetTester tester) async {
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final List<Widget> children = <Widget>[
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const DecoratedBox(decoration: BoxDecoration()),
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const DecoratedBox(decoration: BoxDecoration()),
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const DecoratedBox(decoration: BoxDecoration()),
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const DecoratedBox(decoration: BoxDecoration()),
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];
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: Center(
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child: SizedBox(
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width: 200.0,
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child: GridView.extent(
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maxCrossAxisExtent: 100.0,
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shrinkWrap: true,
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children: children,
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),
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),
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),
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),
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);
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expect(tester.renderObjectList<RenderBox>(find.byType(DecoratedBox)), hasLength(4));
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for (final RenderBox box in tester.renderObjectList<RenderBox>(find.byType(DecoratedBox))) {
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expect(box.size.width, equals(100.0), reason: 'child width');
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expect(box.size.height, equals(100.0), reason: 'child height');
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}
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final RenderBox grid = tester.renderObject(find.byType(GridView));
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expect(grid.size.width, equals(200.0), reason: 'grid width');
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expect(grid.size.height, equals(200.0), reason: 'grid height');
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expect(grid.debugNeedsLayout, false);
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: Center(
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child: SizedBox(
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width: 200.0,
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child: GridView.extent(
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maxCrossAxisExtent: 60.0,
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shrinkWrap: true,
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children: children,
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),
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),
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),
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),
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);
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for (final RenderBox box in tester.renderObjectList<RenderBox>(find.byType(DecoratedBox))) {
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expect(box.size.width, equals(50.0), reason: 'child width');
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expect(box.size.height, equals(50.0), reason: 'child height');
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}
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expect(grid.size.width, equals(200.0), reason: 'grid width');
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expect(grid.size.height, equals(50.0), reason: 'grid height');
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});
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}
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