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;;; test-pearl-mapping.el --- Tests for pearl mapping helpers -*- 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:

;; Unit tests for the pure mapping helpers in pearl.el:
;; Linear priority -> org cookie / readable name, and the priority list.

;;; Code:

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

;; The static Linear-state -> Org-keyword mapping and its derived regex were
;; removed once keyword rendering moved to slugifying the state name
;; (`pearl--state-name-to-keyword'), and the keyword -> state-id direction moved
;; to resolving through the team's states (`pearl--resolve-keyword-to-state').
;; What remains pure-mapping-shaped is the priority conversion, tested below.

;;; pearl--map-linear-priority-to-org

(ert-deftest test-pearl-map-linear-priority-to-org-known-values ()
  "Linear priorities 1-4 map to org cookies A-D."
  (should (string-equal "[#A]" (pearl--map-linear-priority-to-org 1)))
  (should (string-equal "[#B]" (pearl--map-linear-priority-to-org 2)))
  (should (string-equal "[#C]" (pearl--map-linear-priority-to-org 3)))
  (should (string-equal "[#D]" (pearl--map-linear-priority-to-org 4))))

(ert-deftest test-pearl-map-linear-priority-to-org-none-no-cookie ()
  "Priority 0 (No priority) maps to no cookie, distinct from Medium's [#C]."
  (should (string-equal "" (pearl--map-linear-priority-to-org 0))))

(ert-deftest test-pearl-map-linear-priority-to-org-nil-and-unknown-no-cookie ()
  "A nil or out-of-range priority maps to no cookie."
  (should (string-equal "" (pearl--map-linear-priority-to-org nil)))
  (should (string-equal "" (pearl--map-linear-priority-to-org 99))))

;;; pearl--get-linear-priority-name

(ert-deftest test-pearl-get-linear-priority-name-known-values ()
  "Linear priorities 1-4 have readable names."
  (should (string-equal "Urgent" (pearl--get-linear-priority-name 1)))
  (should (string-equal "High"   (pearl--get-linear-priority-name 2)))
  (should (string-equal "Medium" (pearl--get-linear-priority-name 3)))
  (should (string-equal "Low"    (pearl--get-linear-priority-name 4))))

(ert-deftest test-pearl-get-linear-priority-name-none-and-unknown ()
  "Zero (None), nil, and out-of-range priorities read as None."
  (should (string-equal "None" (pearl--get-linear-priority-name 0)))
  (should (string-equal "None" (pearl--get-linear-priority-name nil)))
  (should (string-equal "None" (pearl--get-linear-priority-name 99))))

;;; pearl-get-priorities

(ert-deftest test-pearl-get-priorities-returns-fixed-alist ()
  "The priority list maps the five Linear priority names to their integers."
  (let ((priorities (pearl-get-priorities)))
    (should (equal 0 (cdr (assoc "No priority" priorities))))
    (should (equal 1 (cdr (assoc "Urgent" priorities))))
    (should (equal 2 (cdr (assoc "High" priorities))))
    (should (equal 3 (cdr (assoc "Medium" priorities))))
    (should (equal 4 (cdr (assoc "Low" priorities))))))

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