* lisp/emacs-lisp/ert-x.el (ert-play-keys): new defun.
* test/lisp/simple-tests.el (undo-test-kill-c-a-then-undo)
(undo-test-point-after-forward-kill): Use new function
`ert-play-keys' and `(ert-with-test-buffer (:selected t) ...)'
rather (with-temp-buffer (switch-to-buffer (current-buffer) ...)'.
* test/lisp/erc/erc-scenarios-spelling.el
(erc-scenarios-spelling--auto-correct): Use new function
`ert-play-keys' and `(ert-with-buffer-selected ...)' rather than
`execute-kbd-macro' and `(with-current-buffer
... (set-window-buffer nil (current-buffer) ...)'.
* doc/misc/ert.texi (Helper Functions): Document ert-play-keys,
and differences between ert-simulate-command, ert-simulate-keys
& ert-play-keys.
* test/lisp/emacs-lisp/ert-x-tests.el
(ert-x-tests-play-keys)
(ert-x-tests-simulate-command, ert-x-tests-simulate-keys): New
tests.
5b6fc8ebfc