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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.
71 lines
2.1 KiB
Dart
71 lines
2.1 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 'package:flutter/rendering.dart';
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import 'package:test/test.dart';
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import 'rendering_tester.dart';
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int layouts = 0;
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class RenderLayoutWatcher extends RenderProxyBox {
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RenderLayoutWatcher(RenderBox child) : super(child);
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@override
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void performLayout() {
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layouts += 1;
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super.performLayout();
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}
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}
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void main() {
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test('RenderViewport basic test - impact of layout', () {
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RenderSliverToBoxAdapter sliver;
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RenderViewport viewport;
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RenderBox box;
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RenderObject root = new RenderLayoutWatcher(
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viewport = new RenderViewport(
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offset: new ViewportOffset.zero(),
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children: <RenderSliver>[
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sliver = new RenderSliverToBoxAdapter(child: box = new RenderSizedBox(const Size(100.0, 400.0))),
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],
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),
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);
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expect(layouts, 0);
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layout(root);
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expect(layouts, 1);
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expect(box.localToGlobal(box.size.center(Point.origin)), const Point(400.0, 200.0));
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sliver.child = box = new RenderSizedBox(const Size(100.0, 300.0));
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expect(layouts, 1);
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pumpFrame();
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expect(layouts, 1);
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expect(box.localToGlobal(box.size.center(Point.origin)), const Point(400.0, 150.0));
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viewport.offset = new ViewportOffset.fixed(20.0);
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expect(layouts, 1);
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pumpFrame();
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expect(layouts, 1);
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expect(box.localToGlobal(box.size.center(Point.origin)), const Point(400.0, 130.0));
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viewport.offset = new ViewportOffset.fixed(-20.0);
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expect(layouts, 1);
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pumpFrame();
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expect(layouts, 1);
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expect(box.localToGlobal(box.size.center(Point.origin)), const Point(400.0, 170.0));
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viewport.anchor = 20.0 / 600.0;
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expect(layouts, 1);
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pumpFrame();
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expect(layouts, 1);
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expect(box.localToGlobal(box.size.center(Point.origin)), const Point(400.0, 190.0));
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viewport.axisDirection = AxisDirection.up;
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expect(layouts, 1);
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pumpFrame();
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expect(layouts, 1);
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expect(box.localToGlobal(box.size.center(Point.origin)), const Point(400.0, 600.0 - 190.0));
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});
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}
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