| // 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/material.dart'; |
| import 'package:flutter_api_samples/widgets/draggable_scrollable_sheet/draggable_scrollable_sheet.0.dart' as example; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| testWidgets('Test DraggableScrollableSheet initial state', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const example.DraggableScrollableSheetExampleApp(), |
| ); |
| |
| final Finder sheetFinder = find.byType(DraggableScrollableSheet); |
| |
| // Verify that DraggableScrollableSheet is initially present |
| expect(sheetFinder, findsOneWidget); |
| |
| // Verify that DraggableScrollableSheet is shown initially at 50% height |
| final DraggableScrollableSheet draggableSheet = tester.widget(sheetFinder); |
| expect(draggableSheet.initialChildSize, 0.5); |
| }); |
| |
| testWidgets('Test DraggableScrollableSheet drag behavior on mobile platforms', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const example.DraggableScrollableSheetExampleApp(), |
| ); |
| |
| // Verify that ListView is visible |
| final Finder listViewFinder = find.byType(ListView); |
| expect(listViewFinder, findsOneWidget); |
| |
| // Get the initial size of the ListView |
| final Size listViewInitialSize = tester.getSize(listViewFinder); |
| |
| // Drag the sheet from anywhere inside the sheet to change the sheet position |
| await tester.drag(listViewFinder, const Offset(0.0, -100.0)); |
| await tester.pump(); |
| |
| // Verify that the ListView is expanded |
| final Size listViewCurrentSize = tester.getSize(listViewFinder); |
| expect(listViewCurrentSize.height, greaterThan(listViewInitialSize.height)); |
| }, variant: TargetPlatformVariant.mobile()); |
| |
| testWidgets('Test DraggableScrollableSheet drag behavior on desktop platforms', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const example.DraggableScrollableSheetExampleApp(), |
| ); |
| |
| // Verify that Grabber is visible |
| final Finder grabberFinder = find.byType(example.Grabber); |
| expect(grabberFinder, findsOneWidget); |
| |
| // Drag the Grabber to change the sheet position |
| await tester.drag(grabberFinder, const Offset(0.0, -100.0)); |
| await tester.pump(); |
| |
| // Verify that the DraggableScrollableSheet's initialChildSize is updated |
| final DraggableScrollableSheet draggableSheet = tester.widget(find.byType(DraggableScrollableSheet)); |
| expect(draggableSheet.initialChildSize, isNot(0.5)); |
| }, variant: TargetPlatformVariant.desktop()); |
| } |