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;;; test-pearl-adhoc.el --- Tests for the ad-hoc filtered command -*- 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 ad-hoc filter command: the pure `--assemble-filter' that
;; turns chosen dimension values into a filter plist, `--save-query', and
;; `pearl-list-issues-filtered' running and optionally saving.

;;; Code:

(require 'test-bootstrap (expand-file-name "test-bootstrap.el"))
(require 'cl-lib)

;;; --assemble-filter

(ert-deftest test-pearl-assemble-filter-only-set-keys ()
  "Only the dimensions that were chosen appear in the filter plist."
  (let ((f (pearl--assemble-filter nil t nil nil nil nil)))
    (should (eq t (plist-get f :open)))
    (should-not (plist-member f :team))
    (should-not (plist-member f :labels))))

(ert-deftest test-pearl-assemble-filter-full ()
  "All chosen dimensions land in the plist."
  (let ((f (pearl--assemble-filter "ENG" t "In Progress" "Foo" '("bug" "p1") :me)))
    (should (string= "ENG" (plist-get f :team)))
    (should (eq t (plist-get f :open)))
    (should (string= "In Progress" (plist-get f :state)))
    (should (string= "Foo" (plist-get f :project)))
    (should (equal '("bug" "p1") (plist-get f :labels)))
    (should (eq :me (plist-get f :assignee)))))

(ert-deftest test-pearl-assemble-filter-empty-labels-omitted ()
  "An empty label list does not add a :labels key."
  (let ((f (pearl--assemble-filter nil nil nil nil '() nil)))
    (should-not (plist-member f :labels))))

;;; --save-query

(ert-deftest test-pearl-save-query-adds-entry ()
  "Saving a query adds it to the saved-queries variable."
  (let ((pearl-saved-queries nil))
    (cl-letf (((symbol-function 'customize-save-variable) (lambda (&rest _) nil)))
      (pearl--save-query "My filter" '(:open t :labels ("bug")))
      (let ((entry (assoc "My filter" pearl-saved-queries)))
        (should entry)
        (should (equal '(:open t :labels ("bug")) (plist-get (cdr entry) :filter)))))))

(ert-deftest test-pearl-save-query-replaces-same-name ()
  "Saving under an existing name replaces that entry rather than duplicating."
  (let ((pearl-saved-queries '(("Dup" :filter (:open t)))))
    (cl-letf (((symbol-function 'customize-save-variable) (lambda (&rest _) nil)))
      (pearl--save-query "Dup" '(:priority 1))
      (should (= 1 (cl-count "Dup" pearl-saved-queries
                             :key #'car :test #'string=)))
      (should (equal '(:priority 1)
                     (plist-get (cdr (assoc "Dup" pearl-saved-queries)) :filter))))))

;;; pearl-list-issues-filtered

(ert-deftest test-pearl-list-issues-filtered-runs-with-source ()
  "Running an ad-hoc filter compiles it and renders with a filter source."
  (let ((built nil) (rendered-source 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)
                 (funcall cb (pearl--make-query-result 'ok :issues nil))))
              ((symbol-function 'pearl--render-query-result)
               (lambda (_result source) (setq rendered-source source))))
      (pearl-list-issues-filtered '(:assignee :me :open t) nil)
      (should (equal '(:assignee :me :open t) built))
      (should (eq 'filter (plist-get rendered-source :type)))
      (should (equal '(:assignee :me :open t) (plist-get rendered-source :filter))))))

(ert-deftest test-pearl-list-issues-filtered-saves-when-named ()
  "Passing a save name persists the ad-hoc filter as a saved query."
  (let ((pearl-saved-queries nil))
    (cl-letf (((symbol-function 'pearl--build-issue-filter) (lambda (_p) nil))
              ((symbol-function 'pearl--query-issues-async)
               (lambda (_f cb &optional _o)
                 (funcall cb (pearl--make-query-result 'empty :issues nil))))
              ((symbol-function 'pearl--render-query-result) (lambda (&rest _) nil))
              ((symbol-function 'customize-save-variable) (lambda (&rest _) nil)))
      (pearl-list-issues-filtered '(:open t) "Saved adhoc")
      (should (assoc "Saved adhoc" pearl-saved-queries)))))

(provide 'test-pearl-adhoc)
;;; test-pearl-adhoc.el ends here