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;;; test-nerd-icons-config--color-dir.el --- Tests for cj/--nerd-icons-color-dir -*- lexical-binding: t; -*-
;;; Commentary:
;; Tests for the :filter-return advice that attaches a color face to the
;; output of `nerd-icons-icon-for-dir'. Without this, directory icons render
;; in the buffer default face — so a face-remap of `default' (buffer-local
;; or global) catches the icons unintentionally.
;;; Code:
(require 'ert)
(require 'cl-lib)
(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
(require 'nerd-icons-config)
(ert-deftest test-nerd-icons-config--color-dir-attaches-face ()
"Normal: adds nerd-icons-yellow to the face stack of a propertized icon."
(let ((icon (propertize "X" 'face '(:family "Symbols Nerd Font Mono" :height 1.0))))
(let ((result (cj/--nerd-icons-color-dir icon)))
(should (memq 'nerd-icons-yellow
(ensure-list (get-text-property 0 'face result)))))))
(ert-deftest test-nerd-icons-config--color-dir-preserves-family ()
"Normal: retains the original :family / :height attributes."
(let ((icon (propertize "X" 'face '(:family "Symbols Nerd Font Mono" :height 1.0))))
(let* ((result (cj/--nerd-icons-color-dir icon))
(face (get-text-property 0 'face result))
(specs (ensure-list face))
(plist (seq-find (lambda (x) (and (listp x) (plist-member x :family))) specs)))
(should (equal (plist-get plist :family) "Symbols Nerd Font Mono"))
(should (equal (plist-get plist :height) 1.0)))))
(ert-deftest test-nerd-icons-config--color-dir-empty-string ()
"Boundary: an empty icon string returns unchanged (no range to propertize)."
(let ((icon ""))
(should (equal (cj/--nerd-icons-color-dir icon) ""))))
(ert-deftest test-nerd-icons-config--color-dir-non-string-passthrough ()
"Error: a nil input returns nil rather than erroring."
(should-not (cj/--nerd-icons-color-dir nil)))
(ert-deftest test-nerd-icons-config--color-dir-idempotent ()
"Boundary: calling twice on the same icon adds the face only once.
nerd-icons memoizes its return strings — without this guard, repeated
renders would stack `nerd-icons-yellow' over and over on the cached string."
(let ((icon (propertize "X" 'face '(:family "Symbols Nerd Font Mono" :height 1.0))))
(cj/--nerd-icons-color-dir icon)
(cj/--nerd-icons-color-dir icon)
(cj/--nerd-icons-color-dir icon)
(let* ((face (get-text-property 0 'face icon))
(specs (ensure-list face))
(yellows (cl-count 'nerd-icons-yellow specs)))
(should (= yellows 1)))))
(provide 'test-nerd-icons-config--color-dir)
;;; test-nerd-icons-config--color-dir.el ends here
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