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;;; test-pearl-output.el --- Tests for the active-file output model -*- 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 the active-file output model: the filter summary, the
;; source-tracking header (with the affordance preamble) written by
;; `--build-org-content', reading the active source back from a buffer, and
;; `pearl-refresh-current-view' re-running the recorded source.
;;; Code:
(require 'test-bootstrap (expand-file-name "test-bootstrap.el"))
(require 'cl-lib)
;;; --summarize-filter
(ert-deftest test-pearl-summarize-filter-fields ()
"A filter plist summarizes its set dimensions in a readable string."
(let ((s (pearl--summarize-filter '(:assignee :me :open t :state "In Progress"))))
(should (string-match-p "assignee" s))
(should (string-match-p "open" s))
(should (string-match-p "In Progress" s))))
(ert-deftest test-pearl-summarize-filter-empty ()
"An empty filter summarizes as all issues."
(should (string-match-p "all" (pearl--summarize-filter nil))))
;;; --build-org-content with a source
(ert-deftest test-pearl-build-org-content-source-header ()
"With a source, the header carries the title, serialized source, and count."
(let* ((source '(:type filter :name "My open issues" :filter (:assignee :me :open t)))
(out (pearl--build-org-content '() source)))
(should (string-match-p "^#\\+title: Linear — My open issues$" out))
(should (string-match-p "^#\\+LINEAR-SOURCE: " out))
(should (string-match-p "^#\\+LINEAR-COUNT: 0$" out))
;; affordance preamble is present as org comments, not content
(should (string-match-p "^# .*pearl-sync-current-issue" out))))
(ert-deftest test-pearl-build-org-content-source-roundtrips ()
"The serialized source in the header reads back to the original plist."
(let* ((source '(:type filter :name "Bugs" :filter (:labels ("bug") :open t)))
(out (pearl--build-org-content '() source)))
(with-temp-buffer
(insert out)
(should (equal source (pearl--read-active-source))))))
(ert-deftest test-pearl-build-org-content-default-source-back-compat ()
"Called with no source, the content still has a title and no entries."
(let ((out (pearl--build-org-content '())))
(should (string-match-p "^#\\+title:" out))
(should-not (string-match-p "^\\*\\*\\* " out))))
;;; --read-active-source
(ert-deftest test-pearl-read-active-source-absent ()
"A buffer with no source header reads back nil."
(with-temp-buffer
(insert "#+title: something\n\n* a heading\n")
(should-not (pearl--read-active-source))))
;;; refresh-current-view
(ert-deftest test-pearl-refresh-current-view-reruns-source ()
"Refresh reads the recorded filter source and merges the re-run result."
(let ((ran nil) (merged-source nil)
(source '(:type filter :name "My open issues" :filter (:assignee :me :open t))))
(with-temp-buffer
(insert (format "#+title: Linear — My open issues\n#+LINEAR-SOURCE: %s\n\n"
(prin1-to-string source)))
(org-mode)
(cl-letf (((symbol-function 'pearl--query-issues-async)
(lambda (_filter cb)
(setq ran t)
(funcall cb (pearl--make-query-result 'ok :issues nil))))
((symbol-function 'pearl--merge-query-result)
(lambda (_result src) (setq merged-source src))))
(pearl-refresh-current-view)
(should ran)
(should (equal source merged-source))))))
(ert-deftest test-pearl-refresh-current-view-no-source-errors ()
"Refresh with no recorded source signals a user error."
(with-temp-buffer
(insert "#+title: plain\n")
(org-mode)
(should-error (pearl-refresh-current-view) :type 'user-error)))
;;; --update-org-from-issues surfaces the result
(ert-deftest test-pearl-update-org-surfaces-fresh-buffer ()
"With no buffer visiting the file, the write creates one and surfaces it."
(let* ((tmp (make-temp-file "pearl-out" nil ".org"))
(pearl-org-file-path tmp)
(surfaced nil))
(unwind-protect
(progn
(when (find-buffer-visiting tmp) (kill-buffer (find-buffer-visiting tmp)))
(cl-letf (((symbol-function 'pearl--surface-buffer)
(lambda (b) (setq surfaced b))))
(pearl--update-org-from-issues '() '(:type filter :name "X" :filter nil) nil))
(should (bufferp surfaced))
(should (buffer-live-p surfaced))
(should (string= (file-truename tmp)
(file-truename (buffer-file-name surfaced)))))
(when (find-buffer-visiting tmp) (kill-buffer (find-buffer-visiting tmp)))
(ignore-errors (delete-file tmp)))))
(ert-deftest test-pearl-update-org-surfaces-existing-buffer ()
"With a clean buffer visiting the file, the update surfaces that buffer."
(let* ((tmp (make-temp-file "pearl-out" nil ".org"))
(pearl-org-file-path tmp)
(surfaced nil)
(buf (find-file-noselect tmp)))
(unwind-protect
(progn
(with-current-buffer buf (set-buffer-modified-p nil))
(cl-letf (((symbol-function 'pearl--surface-buffer)
(lambda (b) (setq surfaced b))))
(pearl--update-org-from-issues '() '(:type filter :name "X" :filter nil) nil))
(should (eq surfaced buf)))
(when (buffer-live-p buf)
(with-current-buffer buf (set-buffer-modified-p nil))
(kill-buffer buf))
(ignore-errors (delete-file tmp)))))
(provide 'test-pearl-output)
;;; test-pearl-output.el ends here
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