43b0104114
This reverts commit f41b3411da35929b09009e47cb52474389e42874, reversing changes made to e33d8d96212f3e337a6660f1eb1118bffc945bf5. This was a bad check-in due to my mangling uploading a new version of the branch from a different machine. This reverts https://github.com/flutter/flutter/pull/2639 and will be replaced by https://github.com/flutter/flutter/pull/2640
112 lines
2.6 KiB
Dart
112 lines
2.6 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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import 'package:test/test.dart';
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const double itemExtent = 200.0;
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Axis scrollDirection = Axis.vertical;
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GlobalKey scrollableListKey;
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Widget buildItem(int item) {
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return new Container(
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width: itemExtent,
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height: itemExtent,
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child: new Text(item.toString())
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);
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}
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double snapOffsetCallback(double offset, Size size) {
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return (offset / itemExtent).floor() * itemExtent;
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}
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Widget buildFrame() {
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scrollableListKey = new GlobalKey();
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return new Center(
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child: new Container(
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height: itemExtent * 2.0,
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child: new ScrollableList(
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key: scrollableListKey,
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snapOffsetCallback: snapOffsetCallback,
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scrollDirection: scrollDirection,
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itemExtent: itemExtent,
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children: <int>[0, 1, 2, 3, 4, 5, 7, 8, 9].map(buildItem)
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)
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)
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);
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}
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ScrollableState get scrollableState => scrollableListKey.currentState;
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double get scrollOffset => scrollableState.scrollOffset;
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void set scrollOffset(double value) {
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scrollableState.scrollTo(value);
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}
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Future fling(double velocity) {
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return scrollableState.fling(velocity);
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}
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void main() {
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test('ScrollableList snap scrolling, fling(0.8)', () {
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testWidgets((WidgetTester tester) {
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tester.pumpWidget(buildFrame());
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scrollOffset = 0.0;
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tester.pump();
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expect(scrollOffset, 0.0);
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Duration dt = const Duration(seconds: 2);
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fling(0.8);
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tester.pump(); // Start the scheduler at 0.0
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tester.pump(dt);
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expect(scrollOffset, closeTo(200.0, 1.0));
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scrollOffset = 0.0;
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tester.pump();
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expect(scrollOffset, 0.0);
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fling(2.0);
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tester.pump();
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tester.pump(dt);
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expect(scrollOffset, closeTo(400.0, 1.0));
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scrollOffset = 400.0;
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tester.pump();
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expect(scrollOffset, 400.0);
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fling(-0.8);
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tester.pump();
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tester.pump(dt);
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expect(scrollOffset, closeTo(0.0, 1.0));
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scrollOffset = 800.0;
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tester.pump();
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expect(scrollOffset, 800.0);
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fling(-2.0);
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tester.pump();
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tester.pump(dt);
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expect(scrollOffset, closeTo(200.0, 1.0));
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scrollOffset = 800.0;
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tester.pump();
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expect(scrollOffset, 800.0);
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bool completed = false;
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fling(-2.0).then((_) {
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completed = true;
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expect(scrollOffset, closeTo(200.0, 1.0));
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});
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tester.pump();
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tester.pump(dt);
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expect(completed, true);
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});
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});
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}
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