animation_group_player_spec.ts

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import {fakeAsync} from '@angular/core/testing';
import {NoopAnimationPlayer} from '../src/animations';
import {AnimationGroupPlayer} from '../src/players/animation_group_player';

{
  describe('AnimationGroupPlayer', function() {
    it('should getPosition of an empty group', fakeAsync(() => {
         const players: NoopAnimationPlayer[] = [];
         const groupPlayer = new AnimationGroupPlayer(players);
         expect(groupPlayer.getPosition()).toBe(0);
       }));

    it('should getPosition of a single player in a group', fakeAsync(() => {
         const player = new NoopAnimationPlayer(5, 5);
         player.getPosition = () => 2;
         const players = [player];
         const groupPlayer = new AnimationGroupPlayer(players);
         expect(groupPlayer.getPosition()).toBe(0.2);
       }));

    it('should getPosition based on the longest player in the group', fakeAsync(() => {
         const longestPlayer = new NoopAnimationPlayer(5, 5);
         longestPlayer.getPosition = () => 2;
         const players = [
           new NoopAnimationPlayer(1, 4),
           new NoopAnimationPlayer(4, 1),
           new NoopAnimationPlayer(7, 0),
           longestPlayer,
           new NoopAnimationPlayer(1, 1),
         ];
         const groupPlayer = new AnimationGroupPlayer(players);
         expect(groupPlayer.getPosition()).toBe(0.2);
       }));
  });
}