Intermittent issues triggering events on elements with bound actions

[robmonie]

We've been experiencing an intermittent issue with triggering focus events on inputs within Ember acceptance tests. Sometimes the events trigger and sometimes they don't. This problem occurs with the various helpers such as click('.my-class'), triggerEvent('.my-class', 'focus') or when do this long hand via something like...

andThen(function(){
  Ember.run(function() {
    find('.my-class').focus();
  });
});

The following test app demonstrates this in isolation. See the readme for info about how to run the tests and increase your chances of the problem occurring.

https://github.com/robmonie/test-event-trigger

The tests also include tests against click events on a button that always pass.

Any thoughts on this would be much appreciated. I'd be very happy to find out i'm doing something incorrectly to cause this. If you think there's a better place to raise this, please let me know.

[v-shan]

Hi @robmonie we're experiencing the exact same issues (triggers sometimes, often fails when running via testem in parallel with phantomjs). Did you ever figure it out?

[robmonie]

Hi @v-shan. I'm pretty sure we gave up and worked around this by not triggering focus on the input in our tests but instead triggering a click which has the side effect of focusing the input.

[v-shan]

Thanks @robmonie - we were able to work around this by using triggerHandler instead

[robmonie]

Thanks for the follow up @v-shan. You've actually reminded me of the real reason this wasn't working for us. We noticed that it was due to the browser window not being in focus sometimes when running the tests. When this is the case, the focus/blur events don't fire on the elements being tested.

[v-shan]

@robmonie makes sense- I think we had the same issue. With triggerHandler, "the browser's default focus action would not be triggered, only the event handlers bound to the focus event".

[Turbo87]

I'd recommend to use the focus() helper of https://github.com/cibernox/ember-native-dom-helpers and test in a real browser like headless Chrome because phantom has some known issues with focusing.