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;;; test-mail-config-mu4e-window.el --- mu4e main-view window placement -*- lexical-binding: t; -*-
;;; Commentary:
;; mu4e's main view defaults to a display-buffer-full-frame action that deletes
;; the window split on launch. mail-config registers a display-buffer-alist
;; entry routing the "*mu4e-main*" buffer to the current window instead. These
;; verify the entry is registered and that, with it active, displaying the main
;; buffer under mu4e's own full-frame action no longer collapses a split.
;;; Code:
(require 'ert)
(require 'mail-config)
(ert-deftest test-mail-config-mu4e-main-entry-registered ()
"Normal: the *mu4e-main* alist entry avoids the full-frame action."
(let ((entry (assoc "\\`\\*mu4e-main\\*\\'" display-buffer-alist)))
(should entry)
(should (memq 'display-buffer-same-window (cadr entry)))
(should-not (memq 'display-buffer-full-frame (cadr entry)))))
(ert-deftest test-mail-config-mu4e-main-keeps-split ()
"Normal: displaying *mu4e-main* under the full-frame action keeps the split.
The registered alist entry takes precedence over the action passed to
`display-buffer', so the sibling window survives."
(let ((a (get-buffer-create "*mail-win-test-a*"))
(main (get-buffer-create "*mu4e-main*")))
(unwind-protect
(save-window-excursion
(delete-other-windows)
(set-window-buffer (selected-window) a)
(split-window (selected-window) nil t) ;; side-by-side, batch-friendly
(let ((n (count-windows)))
(display-buffer main '(display-buffer-reuse-window
display-buffer-reuse-mode-window
display-buffer-full-frame))
(should (= (count-windows) n))))
(ignore-errors (kill-buffer a))
(ignore-errors (kill-buffer main)))))
(provide 'test-mail-config-mu4e-window)
;;; test-mail-config-mu4e-window.el ends here
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