Ember run loop sync issues

link.js

MR.TopicsLinkView = Em.View.extend({
  topic: null,
  tagName: 'li',
  classNames: 'topic link',
  templateName: 'ember/templates/topics/link',
  contextBinding: 'topic',

  didInsertElement: function() {
    this._bindDrag();
    this._bindDrop();
  },

  _bindDrag: function() {
    var $view = this.$();

    $view.draggable({
      helper: function() {
        return $view.emberClone();
      },
      scope: 'reorder-topics'
    });

    $view.bind('dragstart', $.callbackArgs(this._onDragStart, this));
  },

  _bindDrop: function() {
    var $view = this.$();

    $view.droppable({
      scope: 'reorder-topics',
      greedy: true,
      activeClass: 'drag-active',
      hoverClass: 'drag-hover'
    });

    $view.bind('drop', $.callbackArgs(this._onDrop, this));
  },

  _onDragStart: function(event, ui, view) {
    var controller, topic;

    controller = view.get('controller');
    topic = view.get('topic');

    controller.setDraggingTopic(topic);
  },

  _onDrop: function(event, ui, view) {
    var controller, topicBefore;

    controller = view.get('controller');
    topicBefore = view.get('topic');

    controller.saveDraggingAfter(topicBefore);
  }
});

link_spec.js

describe("MR.TopicsLinkView", function() {
  var ui, controller, view, topic;

  beforeEach(function() {
    ui = {};

    controller = MR.TopicsController.create();
    topic = MR.Topic.createRecord();

    Em.run(function() {
      view = MR.TopicsLinkView.create({
        controller: controller,
        topic: topic
      });
      view.appendTo('#jasmine_content');
    });
  });

  afterEach(function() {
    view.destroy();
  });

  describe("drag n drop", function() {
    describe("drag", function() {
      it("sets the dragging topic to itself", function() {
        spyOn(controller, 'setDraggingTopic');

        view.$().trigger('dragstart', ui);

        expect(controller.setDraggingTopic).emberToHaveBeenCalledWith(topic);
      });
    });

    describe("drop", function() {
      it("saves the dropped topic", function() {
        spyOn(controller, 'saveDraggingAfter');

        view.$().trigger('drop', ui);

        expect(controller.saveDraggingAfter).emberToHaveBeenCalledWith(topic);
      });
    });
  });
});