| // 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_test/flutter_test.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| void main() { |
| testWidgets('CustomScrollView.center', (WidgetTester tester) async { |
| await tester.pumpWidget(const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('b'), child: SizedBox(height: 100.0)), |
| ], |
| center: Key('a'), |
| ), |
| )); |
| await tester.pumpAndSettle(); |
| expect(tester.getRect(find.descendant(of: find.byKey(const Key('a')), matching: find.byType(SizedBox))), |
| const Rect.fromLTRB(0.0, 0.0, 800.0, 100.0)); |
| expect(tester.getRect(find.descendant(of: find.byKey(const Key('b')), matching: find.byType(SizedBox))), |
| const Rect.fromLTRB(0.0, 100.0, 800.0, 200.0)); |
| }); |
| |
| testWidgets('CustomScrollView.center', (WidgetTester tester) async { |
| await tester.pumpWidget(const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('b'), child: SizedBox(height: 100.0)), |
| ], |
| center: Key('b'), |
| ), |
| )); |
| await tester.pumpAndSettle(); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('a'), skipOffstage: false), |
| matching: find.byType(SizedBox, skipOffstage: false), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, -100.0, 800.0, 0.0), |
| ); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('b')), |
| matching: find.byType(SizedBox), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, 0.0, 800.0, 100.0), |
| ); |
| }); |
| |
| testWidgets('CustomScrollView.anchor', (WidgetTester tester) async { |
| await tester.pumpWidget(const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('b'), child: SizedBox(height: 100.0)), |
| ], |
| center: Key('b'), |
| anchor: 1.0, |
| ), |
| )); |
| await tester.pumpAndSettle(); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('a')), |
| matching: find.byType(SizedBox), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, 500.0, 800.0, 600.0), |
| ); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('b'), skipOffstage: false), |
| matching: find.byType(SizedBox, skipOffstage: false), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, 600.0, 800.0, 700.0), |
| ); |
| }); |
| } |