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Remove snap scrolling test (#8117)

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The new scrolling machinery doesn't support snap scrolling.
This commit is contained in:
Adam Barth 2017-02-13 16:29:58 -08:00 committed by GitHub
parent 73518545e8
commit f36566fa6f
1 changed files with 0 additions and 131 deletions
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131
packages/flutter/test/widgets/snap_scrolling_test.dart
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@ -1,131 +0,0 @@
// Copyright 2015 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 'dart:async';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/widgets.dart';
const double itemExtent = 200.0;
Axis scrollDirection = Axis.vertical;
Widget buildItem(int item) {
return new Container(
width: itemExtent,
height: itemExtent,
child: new Text(item.toString())
);
}
double snapOffsetCallback(double offset, Size size) {
return (offset / itemExtent).floor() * itemExtent;
}
class TestScrollConfigurationDelegate extends ScrollConfigurationDelegate {
const TestScrollConfigurationDelegate();
// Not testing platform-specific fling scrolling, use the default fling
// decleration simulation.
@override
TargetPlatform get platform => null;
@override
ExtentScrollBehavior createScrollBehavior() => new OverscrollWhenScrollableBehavior(platform: platform);
@override
bool updateShouldNotify(ScrollConfigurationDelegate old) => false;
}
Widget buildFrame() {
return new ScrollConfiguration(
delegate: const TestScrollConfigurationDelegate(),
child: new Center(
child: new Container(
height: itemExtent * 2.0,
child: new ScrollableList(
snapOffsetCallback: snapOffsetCallback,
scrollDirection: scrollDirection,
itemExtent: itemExtent,
children: <int>[0, 1, 2, 3, 4, 5, 7, 8, 9].map(buildItem)
)
)
)
);
}
void main() {
testWidgets('ScrollableList snap scrolling', (WidgetTester tester) async {
ScrollableState getScrollableState() => tester.state(find.byType(Scrollable));
double getScrollOffset() => getScrollableState().scrollOffset;
void setScrollOffset(double value) {
getScrollableState().scrollTo(value);
}
Completer<Null> fling(double velocity) {
Completer<Null> completer = new Completer<Null>();
getScrollableState().fling(velocity).whenComplete(completer.complete);
return completer;
}
await tester.pumpWidget(buildFrame());
setScrollOffset(0.0);
await tester.pump();
expect(getScrollOffset(), 0.0);
Duration dt = const Duration(seconds: 2);
Completer<Null> completer = fling(1000.0);
expect(completer.isCompleted, isFalse);
await tester.pump(); // Start the scheduler at 0.0
await tester.pump(dt);
expect(getScrollOffset(), closeTo(200.0, 1.0));
expect(completer.isCompleted, isTrue);
setScrollOffset(0.0);
await tester.pump();
expect(getScrollOffset(), 0.0);
completer = fling(2000.0);
expect(completer.isCompleted, isFalse);
await tester.pump();
await tester.pump(dt);
expect(getScrollOffset(), closeTo(400.0, 1.0));
expect(completer.isCompleted, isTrue);
setScrollOffset(400.0);
await tester.pump();
expect(getScrollOffset(), 400.0);
completer = fling(-800.0);
expect(completer.isCompleted, isFalse);
await tester.pump();
await tester.pump(dt);
expect(getScrollOffset(), closeTo(0.0, 1.0));
expect(completer.isCompleted, isTrue);
setScrollOffset(800.0);
await tester.pump();
expect(getScrollOffset(), 800.0);
completer = fling(-2000.0);
expect(completer.isCompleted, isFalse);
await tester.pump();
await tester.pump(dt);
expect(getScrollOffset(), closeTo(200.0, 1.0));
expect(completer.isCompleted, isTrue);
setScrollOffset(800.0);
await tester.pump();
expect(getScrollOffset(), 800.0);
completer = fling(-2000.0);
expect(completer.isCompleted, isFalse);
await tester.pump();
await tester.pump(dt);
expect(completer.isCompleted, isTrue);
expectSync(getScrollOffset(), closeTo(200.0, 1.0));
});
}