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;;; test-pearl-list-comments.el --- Tests for comments in the bulk list -*- 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 rendering comments in the bulk issue list: the per-issue cap
;; (`pearl--cap-issue-list-comments'), the `💬 shown/total' marker
;; (`pearl--comment-count-marker', the Comments heading), and the way the
;; append locator tolerates the marked heading so a later add-comment finds the
;; existing subtree instead of creating a second one.
;;; Code:
(require 'test-bootstrap (expand-file-name "test-bootstrap.el"))
(defun test-pearl--comments (n)
"Return N comment plists, newest-first (createdAt descending), as the fetch returns."
(let (out)
(dotimes (i n)
;; i=0 is the newest; pad the index so string< orders correctly
(push (list :id (format "c%02d" (- n i))
:author "A"
:created-at (format "2026-05-%02dT00:00:00.000Z" (- n i))
:body (format "comment %d" (- n i)))
out))
(nreverse out)))
;;; --cap-issue-list-comments
(ert-deftest test-pearl-cap-comments-under-shown ()
"Fewer comments than the shown cap keeps them all with an exact total."
(let ((pearl-list-comments-shown 5) (pearl-list-comments-count-cap 25))
(let ((out (pearl--cap-issue-list-comments
(list :id "u" :comments (test-pearl--comments 3)))))
(should (= 3 (length (plist-get out :comments))))
(should (equal '(:shown 3 :total 3 :overflow nil)
(plist-get out :comment-count))))))
(ert-deftest test-pearl-cap-comments-over-shown-under-cap ()
"More than the shown cap but within the count cap: show 5, total exact."
(let ((pearl-list-comments-shown 5) (pearl-list-comments-count-cap 25))
(let ((out (pearl--cap-issue-list-comments
(list :id "u" :comments (test-pearl--comments 18)))))
(should (= 5 (length (plist-get out :comments))))
(should (equal '(:shown 5 :total 18 :overflow nil)
(plist-get out :comment-count))))))
(ert-deftest test-pearl-cap-comments-over-count-cap-overflows ()
"More than the count cap: total pins to the cap and overflows."
(let ((pearl-list-comments-shown 5) (pearl-list-comments-count-cap 25))
;; the fetch pulls cap+1 = 26 to detect overflow
(let ((out (pearl--cap-issue-list-comments
(list :id "u" :comments (test-pearl--comments 26)))))
(should (= 5 (length (plist-get out :comments))))
(should (equal '(:shown 5 :total 25 :overflow t)
(plist-get out :comment-count))))))
(ert-deftest test-pearl-cap-comments-none-unchanged ()
"An issue with no fetched comments is returned untouched, with no marker."
(let ((issue (list :id "u" :comments nil)))
(let ((out (pearl--cap-issue-list-comments issue)))
(should-not (plist-get out :comments))
(should-not (plist-get out :comment-count)))))
(ert-deftest test-pearl-cap-comments-keeps-the-newest ()
"The cap keeps the newest `shown' comments (input arrives newest-first)."
(let ((pearl-list-comments-shown 3) (pearl-list-comments-count-cap 25))
(let* ((out (pearl--cap-issue-list-comments
(list :id "u" :comments (test-pearl--comments 7))))
(ids (mapcar (lambda (c) (plist-get c :id)) (plist-get out :comments))))
;; newest three are c07, c06, c05 (the head of the newest-first list)
(should (equal '("c07" "c06" "c05") ids)))))
;;; --comment-count-marker
(ert-deftest test-pearl-comment-count-marker-forms ()
"The marker renders shown/total, with a `+' past the cap and nothing for nil."
(should (string= " 💬 5/18" (pearl--comment-count-marker '(:shown 5 :total 18 :overflow nil))))
(should (string= " 💬 5/25+" (pearl--comment-count-marker '(:shown 5 :total 25 :overflow t))))
(should (string= " 💬 3/3" (pearl--comment-count-marker '(:shown 3 :total 3 :overflow nil))))
(should (string= "" (pearl--comment-count-marker nil))))
;;; --format-comments with a marker
(ert-deftest test-pearl-format-comments-renders-marker-and-order ()
"With count-info the Comments heading carries the marker; bodies honor the sort order."
(let* ((pearl-comment-sort-order 'newest-first)
(comments (test-pearl--comments 5)) ; newest-first as fetched
(out (pearl--format-comments comments '(:shown 5 :total 12 :overflow nil))))
(should (string-match-p "^\\*\\*\\* Comments 💬 5/12$" out))
;; newest (comment 5) renders before oldest (comment 1)
(should (< (string-match "comment 5\\b" out) (string-match "comment 1\\b" out)))))
(ert-deftest test-pearl-format-comments-no-marker-without-count ()
"Without count-info (the single-issue thread), the heading has no marker."
(let ((out (pearl--format-comments (test-pearl--comments 2))))
(should (string-match-p "^\\*\\*\\* Comments$" out))))
;;; the marked heading is still found by the append locator
(ert-deftest test-pearl-append-finds-marked-comments-heading ()
"Adding a comment to an issue whose Comments heading carries a marker reuses it."
(let ((pearl-state-to-todo-mapping '(("Todo" . "TODO")))
(pearl-list-comments-shown 5) (pearl-list-comments-count-cap 25))
(let ((entry (pearl--format-issue-as-org-entry
(pearl--cap-issue-list-comments
(list :id "a" :identifier "ENG-1" :title "issue"
:priority 3 :state '(:name "Todo")
:comments (test-pearl--comments 8))))))
(with-temp-buffer
(insert entry)
(org-mode)
(goto-char (point-min))
;; the rendered Comments heading carries the marker
(should (re-search-forward "^\\*\\*\\* Comments 💬 5/8$" nil t))
(goto-char (point-min))
(re-search-forward "issue")
(pearl--append-comment-to-issue
'(:id "cnew" :author "Z" :created-at "2026-06-01T00:00:00.000Z" :body "appended"))
;; exactly one Comments heading, and the new comment landed under it
(goto-char (point-min))
(should (re-search-forward "^\\*\\*\\* Comments" nil t))
(should-not (re-search-forward "^\\*\\*\\* Comments" nil t))
(should (string-match-p "appended" (buffer-string)))))))
(provide 'test-pearl-list-comments)
;;; test-pearl-list-comments.el ends here
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