I have already responded to the same private support ticket, however, I will post my response here as well in case anyone else is on the lookout for automated testing of Kendo UI Widgets.
We use QUnit to test our widgets and I would recommend checking it out if you are not constrained by using Cucumber:
You are correct in your observation that occasionally the tested Kendo UI Widget is not yet available or no longer exists - one such widget may be the Kendo UI Window (e.g. on its own or in a Kendo UI popup editable Grid or Scheduler). The tested window may be missing as it is destroyed when closed to avoid memory leaks. Kendo UI Window tests are available at:
Finally, all open source widgets tests in our repository are available for your reference at:
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