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This requires all AnimationController objects to be given a TickerProvider, a class that can create the Ticker. It also provides some nice mixins for people who want to have their State provide a TickerProvider. And a schedulerTickerProvider for those cases where you just want to see your battery burn. Also, we now enforce destruction order for elements.
47 lines
1.5 KiB
Dart
47 lines
1.5 KiB
Dart
// Copyright 2016 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/animation.dart';
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import 'package:flutter/widgets.dart';
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import 'animation_tester.dart';
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void main() {
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test('Can chain tweens', () {
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Tween<double> tween = new Tween<double>(begin: 0.30, end: 0.50);
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expect(tween, hasOneLineDescription);
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Animatable<double> chain = tween.chain(new Tween<double>(begin: 0.50, end: 1.0));
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AnimationController controller = new AnimationController(
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vsync: const TestVSync(),
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);
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expect(chain.evaluate(controller), 0.40);
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expect(chain, hasOneLineDescription);
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});
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test('Can animated tweens', () {
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Tween<double> tween = new Tween<double>(begin: 0.30, end: 0.50);
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AnimationController controller = new AnimationController(
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vsync: const TestVSync(),
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);
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Animation<double> animation = tween.animate(controller);
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controller.value = 0.50;
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expect(animation.value, 0.40);
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expect(animation, hasOneLineDescription);
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expect(animation.toStringDetails(), hasOneLineDescription);
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});
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test('SizeTween', () {
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SizeTween tween = new SizeTween(begin: Size.zero, end: new Size(20.0, 30.0));
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expect(tween.lerp(0.5), equals(new Size(10.0, 15.0)));
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expect(tween, hasOneLineDescription);
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});
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test('IntTween', () {
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IntTween tween = new IntTween(begin: 5, end: 9);
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expect(tween.lerp(0.5), 7);
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expect(tween.lerp(0.7), 8);
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});
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}
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