Currently Test Studio supports Toggle calendar action and selecting date from the visible month when automating Kendo Angular datepicker. 

It will be helpful if the support is extended and setting the date directly in the KendoInput is also an option. As of now using Actions.SetText() is not triggering the necessary events and real user behavior is required to handle the scenario. 

Depending on the exact implementation, a coded step may be required to enter valid date.