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;;; test-pearl-org-write.el --- Tests for pearl org file write-back -*- lexical-binding: t; -*-
;; Copyright (C) 2026 Craig Jennings
;; Author: Craig Jennings <c@cjennings.net>
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Tests for `pearl--update-org-from-issues', the buffer-aware
;; write-back. Uses real temp files (file I/O is the behavior under test);
;; the three branches are no-buffer, clean-buffer, and dirty-buffer.
;;; Code:
(require 'test-bootstrap (expand-file-name "test-bootstrap.el"))
(defvar test-pearl--sample-issues
'((:id "u" :identifier "ENG-1" :title "T" :priority 3 :state (:name "Todo")))
"One normalized issue, enough to render a recognizable org entry.")
(defmacro test-pearl--with-org-file (var &rest body)
"Bind VAR to a fresh temp .org path and run BODY, cleaning up after.
The state mapping is bound so rendering is deterministic."
(declare (indent 1))
`(let* ((,var (make-temp-file "linear-test-" nil ".org"))
(pearl-org-file-path ,var)
(pearl-state-to-todo-mapping '(("Todo" . "TODO"))))
(unwind-protect
(progn ,@body)
(let ((b (find-buffer-visiting ,var)))
(when b
(with-current-buffer b (set-buffer-modified-p nil))
(kill-buffer b)))
(when (file-exists-p ,var) (delete-file ,var)))))
(ert-deftest test-pearl-update-org-no-buffer-writes-file ()
"With no buffer visiting the file, issues are written to disk."
(test-pearl--with-org-file tmp
(let ((b (find-buffer-visiting tmp))) (when b (kill-buffer b)))
(pearl--update-org-from-issues test-pearl--sample-issues)
(let ((content (with-temp-buffer (insert-file-contents tmp) (buffer-string))))
(should (string-match-p "#\\+title: Linear" content))
(should (string-match-p "#\\+LINEAR-SOURCE: " content))
(should (string-match-p "\\*\\* TODO \\[#C\\] T" content)))))
(ert-deftest test-pearl-update-org-clean-buffer-replaces-contents ()
"A clean visiting buffer is replaced in place and saved."
(test-pearl--with-org-file tmp
(let ((buf (find-file-noselect tmp)))
(with-current-buffer buf
(insert "old content")
(save-buffer))
(pearl--update-org-from-issues test-pearl--sample-issues)
(with-current-buffer buf
(should-not (buffer-modified-p))
(should (string-match-p "\\*\\* TODO \\[#C\\] T" (buffer-string)))
(should-not (string-match-p "old content" (buffer-string)))))))
(ert-deftest test-pearl-update-org-dirty-buffer-not-overwritten ()
"A buffer with unsaved edits is left untouched, not clobbered."
(test-pearl--with-org-file tmp
(let ((buf (find-file-noselect tmp)))
(with-current-buffer buf
(insert "unsaved edits"))
(pearl--update-org-from-issues test-pearl--sample-issues)
(with-current-buffer buf
(should (buffer-modified-p))
(should (string-match-p "unsaved edits" (buffer-string)))
(should-not (string-match-p "ENG-1" (buffer-string)))))))
(provide 'test-pearl-org-write)
;;; test-pearl-org-write.el ends here
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