Calling a function interactively, and undo-information

[Tobias C. Rittweiler]

Hi,

Is there a way to invoke a function exactly as if it was invoked by the
command-loop? `call-interactively' does not push an undo-boundary on the
undo-list.

It's for writing unit tests that should check for some specific undo
behaviour. Of course, I could call `undo-boundary' myself after calling
the function, but this would test for something slightly different.

Thanks!,

  -T.