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// 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),
);
});
}