// Copyright 2016 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'package:flutter_test/flutter_test.dart'; import 'package:flutter/animation.dart'; import 'package:flutter/widgets.dart'; void main() { test('Can chain tweens', () { Tween<double> tween = new Tween<double>(begin: 0.30, end: 0.50); expect(tween, hasOneLineDescription); Animatable<double> chain = tween.chain(new Tween<double>(begin: 0.50, end: 1.0)); AnimationController controller = new AnimationController(); expect(chain.evaluate(controller), 0.40); expect(chain, hasOneLineDescription); }); test('Can animated tweens', () { Tween<double> tween = new Tween<double>(begin: 0.30, end: 0.50); AnimationController controller = new AnimationController(); Animation<double> animation = tween.animate(controller); controller.value = 0.50; expect(animation.value, 0.40); expect(animation, hasOneLineDescription); expect(animation.toStringDetails(), hasOneLineDescription); }); test('SizeTween', () { SizeTween tween = new SizeTween(begin: Size.zero, end: new Size(20.0, 30.0)); expect(tween.lerp(0.5), equals(new Size(10.0, 15.0))); expect(tween, hasOneLineDescription); }); test('IntTween', () { IntTween tween = new IntTween(begin: 5, end: 9); expect(tween.lerp(0.5), 7); expect(tween.lerp(0.7), 8); }); }