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a816611de1
Also, rename ScrollableMetrics to ScrollMetrics, which follows the naming convention for most of the other classes (e.g., ScrollPosition, ScrollPhysics). Finally, fix a bug whereby SingleChildScrollView could not have a GlobalKey, because, write test, find bug.
72 lines
2.1 KiB
Dart
72 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/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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class TestScrollBehavior extends ScrollBehavior2 {
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TestScrollBehavior(this.flag);
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final bool flag;
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@override
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ScrollPhysics getScrollPhysics(BuildContext context) {
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return flag
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? const ClampingScrollPhysics()
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: const BouncingScrollPhysics();
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}
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@override
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bool shouldNotify(TestScrollBehavior old) => flag != old.flag;
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}
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void main() {
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testWidgets('Inherited ScrollConfiguration changed', (WidgetTester tester) async {
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final GlobalKey key = new GlobalKey(debugLabel: 'scrollable');
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TestScrollBehavior behavior;
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ScrollPosition position;
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Widget scrollView = new SingleChildScrollView(
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key: key,
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child: new Builder(
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builder: (BuildContext context) {
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behavior = ScrollConfiguration2.of(context);
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position = Scrollable2.of(context).position;
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return new Container(height: 1000.0);
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},
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),
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);
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await tester.pumpWidget(
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new ScrollConfiguration2(
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behavior: new TestScrollBehavior(true),
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child: scrollView,
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),
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);
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expect(behavior, isNotNull);
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expect(behavior.flag, isTrue);
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expect(position.physics, const isInstanceOf<ClampingScrollPhysics>());
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ScrollMetrics metrics = position.getMetrics();
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expect(metrics.extentAfter, equals(400.0));
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expect(metrics.viewportDimension, equals(600.0));
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// Same Scrollable, different ScrollConfiguration
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await tester.pumpWidget(
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new ScrollConfiguration2(
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behavior: new TestScrollBehavior(false),
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child: scrollView,
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),
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);
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expect(behavior, isNotNull);
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expect(behavior.flag, isFalse);
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expect(position.physics, const isInstanceOf<BouncingScrollPhysics>());
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// Regression test for https://github.com/flutter/flutter/issues/5856
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metrics = position.getMetrics();
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expect(metrics.extentAfter, equals(400.0));
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expect(metrics.viewportDimension, equals(600.0));
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});
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}
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