angular-docs-cn/packages/animations/test/animation_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 {flushMicrotasks} from '../../core/testing/src/fake_async';
import {NoopAnimationPlayer} from '../src/players/animation_player';
import {scheduleMicroTask} from '../src/util';

{
  describe('NoopAnimationPlayer', function() {
    it('should finish after the next microtask once started', fakeAsync(() => {
         const log: string[] = [];

         const player = new NoopAnimationPlayer();
         player.onStart(() => log.push('started'));
         player.onDone(() => log.push('done'));
         flushMicrotasks();

         expect(log).toEqual([]);
         player.play();
         expect(log).toEqual(['started']);

         flushMicrotasks();
         expect(log).toEqual(['started', 'done']);
       }));

    it('should fire all callbacks when destroyed', () => {
      const log: string[] = [];

      const player = new NoopAnimationPlayer();
      player.onStart(() => log.push('started'));
      player.onDone(() => log.push('done'));
      player.onDestroy(() => log.push('destroy'));
      expect(log).toEqual([]);

      player.destroy();
      expect(log).toEqual(['started', 'done', 'destroy']);
    });

    it('should fire start/done callbacks manually when called directly', fakeAsync(() => {
         const log: string[] = [];

         const player = new NoopAnimationPlayer();
         player.onStart(() => log.push('started'));
         player.onDone(() => log.push('done'));
         flushMicrotasks();

         (player as any).triggerCallback('start');
         expect(log).toEqual(['started']);

         player.play();
         expect(log).toEqual(['started']);

         (player as any).triggerCallback('done');
         expect(log).toEqual(['started', 'done']);

         player.finish();
         expect(log).toEqual(['started', 'done']);

         flushMicrotasks();
         expect(log).toEqual(['started', 'done']);
       }));

    it('should fire off start callbacks before triggering the finish callback', fakeAsync(() => {
         const log: string[] = [];

         const player = new NoopAnimationPlayer();
         player.onStart(() => {
           scheduleMicroTask(() => log.push('started'));
         });
         player.onDone(() => log.push('done'));
         expect(log).toEqual([]);

         player.play();
         expect(log).toEqual([]);

         flushMicrotasks();
         expect(log).toEqual(['started', 'done']);
       }));
  });
}