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+;;; test-pearl-saved.el --- Tests for saved queries + sort -*- 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 local saved queries and the sort layer: the client-side
+;; `--sort-issues', the sort->orderBy mapping, and `pearl-run-saved-query'
+;; threading the filter, source, and order through.
+
+;;; Code:
+
+(require 'test-bootstrap (expand-file-name "test-bootstrap.el"))
+(require 'cl-lib)
+
+;;; --sort-issues
+
+(defconst test-pearl--sort-sample
+  '((:title "banana" :priority 2 :updated-at "2026-05-23T10:00:00.000Z")
+    (:title "apple"  :priority 1 :updated-at "2026-05-23T12:00:00.000Z")
+    (:title "cherry" :priority 3 :updated-at "2026-05-23T08:00:00.000Z"))
+  "Three issues for exercising the client-side sort.")
+
+(ert-deftest test-pearl-sort-issues-nil-sort-unchanged ()
+  "With no sort key, the issues are returned in their original order."
+  (should (equal test-pearl--sort-sample
+                 (pearl--sort-issues test-pearl--sort-sample nil nil))))
+
+(ert-deftest test-pearl-sort-issues-title-asc ()
+  "Sorting by title ascending orders alphabetically."
+  (let ((out (pearl--sort-issues test-pearl--sort-sample 'title 'asc)))
+    (should (equal '("apple" "banana" "cherry")
+                   (mapcar (lambda (i) (plist-get i :title)) out)))))
+
+(ert-deftest test-pearl-sort-issues-updated-desc-default ()
+  "Sorting by updated, descending, puts the most recent first."
+  (let ((out (pearl--sort-issues test-pearl--sort-sample 'updated 'desc)))
+    (should (string= "apple" (plist-get (car out) :title)))
+    (should (string= "cherry" (plist-get (car (last out)) :title)))))
+
+(ert-deftest test-pearl-sort-issues-priority-asc ()
+  "Sorting by priority ascending orders by the numeric value."
+  (let ((out (pearl--sort-issues test-pearl--sort-sample 'priority 'asc)))
+    (should (equal '(1 2 3) (mapcar (lambda (i) (plist-get i :priority)) out)))))
+
+;;; --sort->order-by
+
+(ert-deftest test-pearl-sort-to-order-by ()
+  "Updated/created map to the server orderBy; everything else defaults to updatedAt."
+  (should (eq 'updatedAt (pearl--sort->order-by 'updated)))
+  (should (eq 'createdAt (pearl--sort->order-by 'created)))
+  (should (eq 'updatedAt (pearl--sort->order-by 'title))))
+
+;;; run-saved-query
+
+(ert-deftest test-pearl-run-saved-query-threads-filter-and-source ()
+  "Running a saved query compiles its filter and renders with a sorted source."
+  (let ((pearl-saved-queries
+         '(("My bugs" :filter (:labels ("bug") :open t) :sort priority :order asc)))
+        (built nil) (rendered-source nil) (order nil))
+    (cl-letf (((symbol-function 'pearl--build-issue-filter)
+               (lambda (plist) (setq built plist) '((compiled . t))))
+              ((symbol-function 'pearl--query-issues-async)
+               (lambda (_filter cb &optional ord) (setq order ord)
+                 (funcall cb (pearl--make-query-result 'ok :issues nil))))
+              ((symbol-function 'pearl--render-query-result)
+               (lambda (_result source) (setq rendered-source source))))
+      (pearl-run-saved-query "My bugs")
+      (should (equal '(:labels ("bug") :open t) built))
+      (should (eq 'priority (plist-get rendered-source :sort)))
+      (should (eq 'asc (plist-get rendered-source :order)))
+      (should (eq 'filter (plist-get rendered-source :type)))
+      (should (eq 'updatedAt order)))))
+
+(ert-deftest test-pearl-run-saved-query-unknown-errors ()
+  "An unknown saved-query name signals a user error."
+  (let ((pearl-saved-queries '(("Known" :filter (:open t)))))
+    (should-error (pearl-run-saved-query "Missing") :type 'user-error)))
+
+;;; render applies the source sort
+
+(ert-deftest test-pearl-render-query-result-sorts-by-source ()
+  "The render boundary sorts issues by the source's sort/order before writing."
+  (let ((written nil)
+        (source '(:type filter :name "By title" :filter nil :sort title :order asc)))
+    (cl-letf (((symbol-function 'pearl--normalize-issue) #'identity)
+              ((symbol-function 'pearl--update-org-from-issues)
+               (lambda (issues &optional _s _t) (setq written issues))))
+      (pearl--render-query-result
+       (pearl--make-query-result
+        'ok :issues '((:title "banana") (:title "apple")))
+       source)
+      (should (equal '("apple" "banana")
+                     (mapcar (lambda (i) (plist-get i :title)) written))))))
+
+(provide 'test-pearl-saved)
+;;; test-pearl-saved.el ends here