| // 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/magnifier/magnifier.0.dart' |
| as example; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| testWidgets('should update magnifier position on drag', (WidgetTester tester) async { |
| await tester.pumpWidget(const example.MyApp()); |
| |
| Matcher isPositionedAt(Offset at) { |
| return isA<Positioned>().having( |
| (Positioned positioned) => Offset(positioned.left!, positioned.top!), |
| 'magnifier position', |
| at, |
| ); |
| } |
| |
| expect( |
| tester.widget(find.byType(Positioned)), |
| isPositionedAt(Offset.zero), |
| ); |
| |
| final Offset centerOfFlutterLogo = tester.getCenter(find.byType(Positioned)); |
| final Offset topLeftOfFlutterLogo = tester.getTopLeft(find.byType(FlutterLogo)); |
| |
| const Offset dragDistance = Offset(10, 10); |
| |
| await tester.dragFrom(centerOfFlutterLogo, dragDistance); |
| await tester.pump(); |
| |
| expect( |
| tester.widget(find.byType(Positioned)), |
| // Need to adjust by the topleft since the position is local. |
| isPositionedAt((centerOfFlutterLogo - topLeftOfFlutterLogo) + dragDistance), |
| ); |
| }); |
| |
| testWidgets('should match golden', (WidgetTester tester) async { |
| await tester.pumpWidget(const example.MyApp()); |
| |
| final Offset centerOfFlutterLogo = tester.getCenter(find.byType(Positioned)); |
| const Offset dragDistance = Offset(10, 10); |
| |
| await tester.dragFrom(centerOfFlutterLogo, dragDistance); |
| await tester.pump(); |
| |
| await expectLater( |
| find.byType(RepaintBoundary).last, |
| matchesGoldenFile('magnifier.0_test.png'), |
| ); |
| }); |
| } |