Helps

“How do I avoid timing problems while doing integration tests on single page apps?”

• Use a wait_until block with a selector which has not been cached.
• Use a wait_until block with a piece of javascript using evaluate_script which you expect to return when your page is finished loading.
• Use a wait_until block which waits for all AJAX to stop using $.ajaxStop().

Interesting

• Time.parse(invalid) will throw an exception, but
  Time.zone.parse(invalid) will return nil. Because Time.parse is part of the Ruby library while Time.zone is part of Rails.
• parallel_tests really does speed up your tests. It munges all the output together into an ugly mess though.