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I'm writing tests for an interactive function. I've been using the unread-command-events variable in conjunction with call-interactively to verify that it does the right thing.

However, I just discovered that this doesn't work in batch mode.

For example:

(defun my-dummy (s)
  (interactive "sWrite something: ")
  s)

(ert-deftest my-dummy-test ()
  (let ((unread-command-events (listify-key-sequence "Hi!\n")))
    (should (equal (call-interactively #'my-dummy)
                   "Hi!"))))

When running ert in interactive mode, this works. However, in batch mode, Emacs stops and read the keyboard without consuming input from unread-command-events.

In this a bug in batch mode or is this the expected behaviour?

Is there any other way to do this in batch mode?

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