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e0b12ca17e
Rename all the "2" classes related to scrolling to remove the "2". Now that the old scrolling code is gone, we don't need to use the suffix.
82 lines
3.0 KiB
Dart
82 lines
3.0 KiB
Dart
// Copyright 2017 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 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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Future<Null> pumpTest(WidgetTester tester, TargetPlatform platform) async {
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await tester.pumpWidget(new MaterialApp(
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theme: new ThemeData(
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platform: platform,
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),
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home: new CustomScrollView(
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slivers: <Widget>[
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new SliverToBoxAdapter(child: const SizedBox(height: 2000.0)),
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],
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),
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));
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await tester.pump(const Duration(seconds: 5)); // to let the theme animate
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return null;
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}
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const double dragOffset = 200.0;
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double getScrollOffset(WidgetTester tester) {
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RenderViewport viewport = tester.renderObject(find.byType(Viewport));
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return viewport.offset.pixels;
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}
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void resetScrollOffset(WidgetTester tester) {
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RenderViewport viewport = tester.renderObject(find.byType(Viewport));
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ScrollPosition position = viewport.offset;
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position.jumpTo(0.0);
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}
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void main() {
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testWidgets('Flings on different platforms', (WidgetTester tester) async {
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await pumpTest(tester, TargetPlatform.android);
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await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(); // trigger fling
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(const Duration(seconds: 5));
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final double result1 = getScrollOffset(tester);
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resetScrollOffset(tester);
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await pumpTest(tester, TargetPlatform.iOS);
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await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(); // trigger fling
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(const Duration(seconds: 5));
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final double result2 = getScrollOffset(tester);
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expect(result1, lessThan(result2)); // iOS (result2) is slipperier than Android (result1)
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});
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testWidgets('Flings on different platforms', (WidgetTester tester) async {
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await pumpTest(tester, TargetPlatform.iOS);
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await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(); // trigger fling
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(const Duration(seconds: 5));
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final double result1 = getScrollOffset(tester);
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resetScrollOffset(tester);
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await pumpTest(tester, TargetPlatform.android);
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await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(); // trigger fling
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expect(getScrollOffset(tester), dragOffset);
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await tester.pump(const Duration(seconds: 5));
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final double result2 = getScrollOffset(tester);
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expect(result1, greaterThan(result2)); // iOS (result1) is slipperier than Android (result2)
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});
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}
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