// 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), ); }); }