text: /**
   * Copyright 2017 Google Inc.
   * 
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  suite('animation-constructor', function() {
    setup(function() {
      document.timeline._players = [];
    });
  
    test('Playing an Animation makes a Player', function() {
      var animation = new Animation(document.body, [], 1000);
      assert.equal(document.body.getAnimationPlayers().length, 0);
  
      var player = document.timeline.play(animation);
      tick(200);
      assert.equal(document.body.getAnimationPlayers().length, 1);
  
      tick(1600);
      assert.equal(document.body.getAnimationPlayers().length, 0);
    });
  
    test('Setting the timing function on an Animation works', function() {
      function leftAsNumber(target) {
        left = getComputedStyle(target).left;
        return Number(left.substring(0, left.length - 2));
      }
  
      var target1 = document.createElement('div');
      var target2 = document.createElement('div');
      target1.style.position = 'absolute';
      target2.style.position = 'absolute';
      document.body.appendChild(target1);
      document.body.appendChild(target2);
  
      var animation1 = new Animation(target1, [{left: '0px'}, {left: '50px'}], 1000);
      var animation2 = new Animation(target2, [{left: '0px'}, {left: '50px'}], {duration: 1000, easing: 'ease-in'});
  
      var player1 = document.timeline.play(animation1);
      var player2 = document.timeline.play(animation2);
  
      tick(0);
      assert.equal(leftAsNumber(target1), 0);
      assert.equal(leftAsNumber(target2), 0);
  
      tick(250);
      assert.closeTo(leftAsNumber(target1), 12.5, 1);
      assert.closeTo(leftAsNumber(target2), 4.65, 1);
  
      tick(500);
      assert.closeTo(leftAsNumber(target1), 25, 1);
      assert.closeTo(leftAsNumber(target2), 15.25, 1);
    });
  
    test('Timing is always converted to AnimationTimingInput', function() {
      var target = document.createElement('div');
      document.body.appendChild(target);
  
      var keyframes = [{background: 'blue'}, {background: 'red'}];
  
      var animation = new Animation(target, keyframes, 200);
      assert.equal(animation.timing.duration, 200);
  
      animation = new Animation(target, keyframes);
      assert.isDefined(animation.timing);
  
      animation = new Animation(target, keyframes, {duration: 200});
      var group = new AnimationGroup([animation]);
      assert.equal(group.timing.duration, 'auto');
    });
  });
  