blob: 7f03bf6b343cd82e65336c953a4f78d6c14dab19 [file] [log] [blame]
// Copyright 2017 The Chromium 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/material.dart';
void main() {
testWidgets('Sliver appbars - floating and pinned - second app bar stacks below', (WidgetTester tester) async {
final ScrollController controller = new ScrollController();
await tester.pumpWidget(
new Directionality(
textDirection: TextDirection.ltr,
child: new MediaQuery(
data: const MediaQueryData(),
child: new CustomScrollView(
controller: controller,
slivers: const <Widget>[
const SliverAppBar(floating: true, pinned: true, expandedHeight: 200.0, title: const Text('A')),
const SliverAppBar(primary: false, pinned: true, title: const Text('B')),
const SliverList(
delegate: const SliverChildListDelegate(
const <Widget>[
const Text('C'),
const Text('D'),
const SizedBox(height: 500.0),
const Text('E'),
const SizedBox(height: 500.0),
],
),
),
],
),
),
),
);
const Offset textPositionInAppBar = const Offset(16.0, 18.0);
expect(tester.getTopLeft(find.text('A')), textPositionInAppBar);
// top app bar is 200.0 high at this point
expect(tester.getTopLeft(find.text('B')), const Offset(0.0, 200.0) + textPositionInAppBar);
// second app bar is 56.0 high
expect(tester.getTopLeft(find.text('C')), const Offset(0.0, 200.0 + 56.0)); // height of both appbars
final Size cSize = tester.getSize(find.text('C'));
controller.jumpTo(200.0 - 56.0);
await tester.pump();
expect(tester.getTopLeft(find.text('A')), textPositionInAppBar);
// top app bar is now only 56.0 high, same as second
expect(tester.getTopLeft(find.text('B')), const Offset(0.0, 56.0) + textPositionInAppBar);
expect(tester.getTopLeft(find.text('C')), const Offset(0.0, 56.0 * 2.0)); // height of both collapsed appbars
expect(find.text('E'), findsNothing);
controller.jumpTo(600.0);
await tester.pump();
expect(tester.getTopLeft(find.text('A')), textPositionInAppBar); // app bar is pinned at top
expect(tester.getTopLeft(find.text('B')), const Offset(0.0, 56.0) + textPositionInAppBar); // second one too
expect(find.text('C'), findsNothing); // contents are scrolled off though
expect(find.text('D'), findsNothing);
// we have scrolled 600.0 pixels
// initial position of E was 200 + 56 + cSize.height + cSize.height + 500
// we've scrolled that up by 600.0, meaning it's at that minus 600 now:
expect(tester.getTopLeft(find.text('E')), new Offset(0.0, 200.0 + 56.0 + cSize.height * 2.0 + 500.0 - 600.0));
});
}