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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 state <-> org keyword, the cached TODO-states regex, and
;; Linear priority -> org cookie / readable name.
;;; Code:
(require 'test-bootstrap (expand-file-name "test-bootstrap.el"))
;; A small, explicit mapping used across the state tests so cases don't
;; depend on the package default.
(defmacro test-pearl--with-mapping (mapping &rest body)
"Run BODY with the state mapping bound to MAPPING and the cache cleared."
(declare (indent 1))
`(let ((pearl-state-to-todo-mapping ,mapping)
(pearl-todo-states-pattern nil)
(pearl--todo-states-pattern-source nil))
,@body))
;;; pearl--map-linear-state-to-org
(ert-deftest test-pearl-map-linear-state-to-org-mapped-returns-keyword ()
"A Linear state present in the mapping returns its org keyword."
(test-pearl--with-mapping '(("Todo" . "TODO") ("In Progress" . "DOING"))
(should (string-equal "DOING" (pearl--map-linear-state-to-org "In Progress")))))
(ert-deftest test-pearl-map-linear-state-to-org-unmapped-defaults-todo ()
"An unmapped Linear state falls back to TODO."
(test-pearl--with-mapping '(("Todo" . "TODO") ("Done" . "DONE"))
(should (string-equal "TODO" (pearl--map-linear-state-to-org "Triage")))))
(ert-deftest test-pearl-map-linear-state-to-org-nil-defaults-todo ()
"A nil state falls back to TODO rather than erroring."
(test-pearl--with-mapping '(("Todo" . "TODO"))
(should (string-equal "TODO" (pearl--map-linear-state-to-org nil)))))
;;; pearl--map-org-state-to-linear
(ert-deftest test-pearl-map-org-state-to-linear-mapped-returns-state ()
"An org keyword present in the mapping returns its Linear state."
(test-pearl--with-mapping '(("Todo" . "TODO") ("In Progress" . "DOING"))
(should (string-equal "In Progress" (pearl--map-org-state-to-linear "DOING")))))
(ert-deftest test-pearl-map-org-state-to-linear-unmapped-returns-nil ()
"An org keyword not in the mapping returns nil."
(test-pearl--with-mapping '(("Todo" . "TODO") ("Done" . "DONE"))
(should (null (pearl--map-org-state-to-linear "WAITING")))))
(ert-deftest test-pearl-map-org-state-to-linear-nil-returns-nil ()
"A nil org keyword returns nil."
(test-pearl--with-mapping '(("Todo" . "TODO"))
(should (null (pearl--map-org-state-to-linear nil)))))
;;; pearl--get-todo-states-pattern
(ert-deftest test-pearl-get-todo-states-pattern-builds-alternation ()
"The pattern is the org keywords joined with regex alternation."
(test-pearl--with-mapping '(("Todo" . "TODO") ("In Progress" . "IN-PROGRESS") ("Done" . "DONE"))
(should (string-equal "TODO\\|IN-PROGRESS\\|DONE"
(pearl--get-todo-states-pattern)))))
(ert-deftest test-pearl-get-todo-states-pattern-empty-mapping ()
"An empty mapping yields an empty pattern string."
(test-pearl--with-mapping '()
(should (string-equal "" (pearl--get-todo-states-pattern)))))
(ert-deftest test-pearl-get-todo-states-pattern-recomputes-after-mapping-change ()
"The cached pattern is recomputed when the mapping changes mid-session.
Regression for the stale-cache bug: a once-populated pattern must not
outlive a change to `pearl-state-to-todo-mapping'."
(test-pearl--with-mapping '(("Todo" . "TODO") ("Done" . "DONE"))
(should (string-equal "TODO\\|DONE" (pearl--get-todo-states-pattern)))
;; Change the mapping after the pattern has been cached.
(setq pearl-state-to-todo-mapping
'(("Todo" . "TODO") ("In Progress" . "DOING") ("Done" . "DONE")))
(should (string-equal "TODO\\|DOING\\|DONE"
(pearl--get-todo-states-pattern)))))
;;; 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-zero-defaults-c ()
"Priority 0 (No priority) falls back to [#C]."
(should (string-equal "[#C]" (pearl--map-linear-priority-to-org 0))))
(ert-deftest test-pearl-map-linear-priority-to-org-nil-and-unknown-default-c ()
"A nil or out-of-range priority falls back to [#C]."
(should (string-equal "[#C]" (pearl--map-linear-priority-to-org nil)))
(should (string-equal "[#C]" (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-nil-and-unknown-default-medium ()
"A nil, zero, or out-of-range priority falls back to Medium."
(should (string-equal "Medium" (pearl--get-linear-priority-name 0)))
(should (string-equal "Medium" (pearl--get-linear-priority-name nil)))
(should (string-equal "Medium" (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
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