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Add carousel view builder named constructor Fixes: #170692 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing.
34 lines
1.1 KiB
Dart
34 lines
1.1 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/material.dart';
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import 'package:flutter_api_samples/material/carousel/carousel.1.dart' as example;
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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testWidgets('CarouselView.builder creates items lazily', (WidgetTester tester) async {
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await tester.pumpWidget(const example.CarouselBuilderExampleApp());
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expect(find.byType(CarouselView), findsOneWidget);
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expect(find.text('Item 0'), findsOneWidget);
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expect(find.text('Item 999'), findsNothing);
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final Finder carousel = find.byType(CarouselView);
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await tester.drag(carousel, const Offset(-350, 0));
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await tester.pumpAndSettle();
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expect(find.text('Item 1'), findsOneWidget);
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expect(find.text('Item 0'), findsNothing);
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for (int i = 0; i < 5; i++) {
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await tester.drag(carousel, const Offset(-350, 0));
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await tester.pumpAndSettle();
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}
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expect(find.text('Item 6'), findsOneWidget);
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});
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}
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