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;;; test-nov-reading--palette.el --- nov reading-palette tests -*- lexical-binding: t; -*-
;;; Commentary:
;; Pure-logic tests for the nov-mode reading-palette selector: name->face
;; resolution and the cycle order (palettes, then the no-palette state, wrapping).
;; The buffer-local face-remap application is exercised live, not here.
;;; Code:
(require 'ert)
(require 'cl-lib)
(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
(require 'nov-reading)
(declare-function cj/nov--reading-palette-face "nov-reading" (name))
(declare-function cj/nov--next-reading-palette "nov-reading" (current names))
(defvar cj/nov-reading-palettes)
;;; ----------------------- cj/nov--reading-palette-face -----------------------
(ert-deftest test-nov-reading-palette-face-known ()
"Normal: a known palette name resolves to its face."
(let ((cj/nov-reading-palettes '(("sepia" . cj/nov-reading-sepia)
("dark" . cj/nov-reading-dark))))
(should (eq (cj/nov--reading-palette-face "sepia") 'cj/nov-reading-sepia))
(should (eq (cj/nov--reading-palette-face "dark") 'cj/nov-reading-dark))))
(ert-deftest test-nov-reading-palette-face-unknown ()
"Error: an unknown name resolves to nil."
(let ((cj/nov-reading-palettes '(("sepia" . cj/nov-reading-sepia))))
(should-not (cj/nov--reading-palette-face "nope"))))
(ert-deftest test-nov-reading-palette-face-nil ()
"Boundary: a nil name resolves to nil."
(let ((cj/nov-reading-palettes '(("sepia" . cj/nov-reading-sepia))))
(should-not (cj/nov--reading-palette-face nil))))
;;; ----------------------- cj/nov--next-reading-palette -----------------------
(ert-deftest test-nov-reading-next-palette-advances ()
"Normal: cycles to the next palette in order."
(should (equal (cj/nov--next-reading-palette "sepia" '("sepia" "dark" "light"))
"dark")))
(ert-deftest test-nov-reading-next-palette-last-to-none ()
"Boundary: the last palette cycles to the no-palette state (nil)."
(should-not (cj/nov--next-reading-palette "light" '("sepia" "dark" "light"))))
(ert-deftest test-nov-reading-next-palette-none-to-first ()
"Boundary: the no-palette state (nil) cycles to the first palette."
(should (equal (cj/nov--next-reading-palette nil '("sepia" "dark" "light"))
"sepia")))
(ert-deftest test-nov-reading-next-palette-unknown-current-falls-to-first ()
"Error: an unknown current palette falls back to the first."
(should (equal (cj/nov--next-reading-palette "gone" '("sepia" "dark" "light"))
"sepia")))
(provide 'test-nov-reading--palette)
;;; test-nov-reading--palette.el ends here
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