449f4a6673
* Update project.pbxproj files to say Flutter rather than Chromium Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright. * Update the copyright notice checker to require a standard notice on all files * Update copyrights on Dart files. (This was a mechanical commit.) * Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine. Some were already marked "The Flutter Authors", not clear why. Their dates have been normalized. Some were missing the blank line after the license. Some were randomly different in trivial ways for no apparent reason (e.g. missing the trailing period). * Clean up the copyrights in non-Dart files. (Manual edits.) Also, make sure templates don't have copyrights. * Fix some more ORGANIZATIONNAMEs
79 lines
2.9 KiB
Dart
79 lines
2.9 KiB
Dart
// Copyright 2014 The Flutter 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/scheduler.dart';
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import 'package:flutter/widgets.dart';
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void main() {
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testWidgets('Does not animate if already at target position', (WidgetTester tester) async {
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final ScrollController controller = ScrollController();
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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children: List<Widget>.generate(80, (int i) => Text('$i', textDirection: TextDirection.ltr)),
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controller: controller,
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),
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),
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);
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expectNoAnimation();
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final double currentPosition = controller.position.pixels;
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controller.position.animateTo(currentPosition, duration: const Duration(seconds: 10), curve: Curves.linear);
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expectNoAnimation();
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expect(controller.position.pixels, currentPosition);
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});
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testWidgets('Does not animate if already at target position within tolerance', (WidgetTester tester) async {
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final ScrollController controller = ScrollController();
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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children: List<Widget>.generate(80, (int i) => Text('$i', textDirection: TextDirection.ltr)),
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controller: controller,
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),
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),
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);
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expectNoAnimation();
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final double halfTolerance = controller.position.physics.tolerance.distance / 2;
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expect(halfTolerance, isNonZero);
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final double targetPosition = controller.position.pixels + halfTolerance;
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controller.position.animateTo(targetPosition, duration: const Duration(seconds: 10), curve: Curves.linear);
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expectNoAnimation();
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expect(controller.position.pixels, targetPosition);
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});
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testWidgets('Animates if going to a position outside of tolerance', (WidgetTester tester) async {
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final ScrollController controller = ScrollController();
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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children: List<Widget>.generate(80, (int i) => Text('$i', textDirection: TextDirection.ltr)),
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controller: controller,
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),
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),
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);
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expectNoAnimation();
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final double doubleTolerance = controller.position.physics.tolerance.distance * 2;
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expect(doubleTolerance, isNonZero);
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final double targetPosition = controller.position.pixels + doubleTolerance;
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controller.position.animateTo(targetPosition, duration: const Duration(seconds: 10), curve: Curves.linear);
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expect(SchedulerBinding.instance.transientCallbackCount, equals(1), reason: 'Expected an animation.');
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});
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}
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void expectNoAnimation() {
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expect(SchedulerBinding.instance.transientCallbackCount, equals(0), reason: 'Expected no animation.');
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}
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