Ember.js：如何在组件测试中断言事件未绑定？

Question

In component code like:

didInsertElement() {
  this.$('.something').on(//...);
},
willDestroyElement() {
  this.$('.something').off(//...);
}

You have the method of querying for events $._data(this.$('.something')[0], 'events') , but when destroyed, the element is gone. Is there a way to assert in test that the event was actually unbound before destroyed? Is there a way to query for all events on the page then somehow filter for the one in question?

Answer 1

There is no way to programmatically determine whether an event has been bound or unbound to an element without adding an interface in between and tracking it there.

So in effect, you've actually answered your own question: accessing the listener via jQuery is the way to go. Cache the element before destroying the component, and use it for the lookup after.