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;;; test-ui-config--buffer-cursor-state.el --- Tests for cursor-state classification -*- lexical-binding: t; -*-
;;; Commentary:
;; `cj/--buffer-cursor-state' picks the buffer-state symbol that
;; `cj/set-cursor-color-according-to-mode' maps to a cursor color via
;; `cj/buffer-status-colors'. The subtle case: a live ghostel terminal is
;; technically `buffer-read-only' but the user types into it -- keystrokes go
;; to the terminal process -- so it must report a writeable state, not
;; `read-only'. ghostel's `copy' / `emacs' input modes are the exception:
;; there the buffer really is a read-only Emacs buffer the user navigates, so
;; `read-only' (the orange cursor) is correct and kept.
;;; Code:
(require 'ert)
(require 'cl-lib)
(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
(add-to-list 'load-path (expand-file-name "tests" user-emacs-directory))
(setq load-prefer-newer t)
(defvar ghostel--input-mode nil)
(require 'ui-config)
(require 'testutil-ghostel-buffers)
(ert-deftest test-ui-config-buffer-cursor-state-readwrite-unmodified ()
"Normal: a clean writeable buffer reports `unmodified'."
(with-temp-buffer
(set-buffer-modified-p nil)
(should (eq (cj/--buffer-cursor-state) 'unmodified))))
(ert-deftest test-ui-config-buffer-cursor-state-readwrite-modified ()
"Normal: a writeable buffer with unsaved changes reports `modified'."
(with-temp-buffer
(insert "x")
(should (eq (cj/--buffer-cursor-state) 'modified))))
(ert-deftest test-ui-config-buffer-cursor-state-read-only ()
"Normal: a plain read-only buffer reports `read-only'."
(with-temp-buffer
(setq buffer-read-only t)
(should (eq (cj/--buffer-cursor-state) 'read-only))))
(ert-deftest test-ui-config-buffer-cursor-state-overwrite ()
"Boundary: `overwrite-mode' wins over the modified/unmodified split."
(with-temp-buffer
(insert "x")
(overwrite-mode 1)
(should (eq (cj/--buffer-cursor-state) 'overwrite))))
(ert-deftest test-ui-config-buffer-cursor-state-live-ghostel-is-writeable ()
"Boundary: a live ghostel buffer is `buffer-read-only' but reports a
writeable state -- the user types into the terminal process there, so the
read-only (orange) cursor would be misleading."
(let ((buf (cj/test--make-fake-ghostel-buffer "*test-ghostel-cursor-state*")))
(unwind-protect
(with-current-buffer buf
(setq buffer-read-only t) ; ghostel keeps the buffer read-only
(setq-local ghostel--input-mode 'semi-char)
(should-not (eq (cj/--buffer-cursor-state) 'read-only)))
(when (buffer-live-p buf) (kill-buffer buf)))))
(ert-deftest test-ui-config-buffer-cursor-state-ghostel-copy-mode-is-read-only ()
"Boundary: in ghostel `copy' mode the buffer is a read-only Emacs buffer
the user navigates, so `read-only' (orange) is kept."
(let ((buf (cj/test--make-fake-ghostel-buffer "*test-ghostel-cursor-state-copy*")))
(unwind-protect
(with-current-buffer buf
(setq buffer-read-only t)
(setq-local ghostel--input-mode 'copy)
(should (eq (cj/--buffer-cursor-state) 'read-only)))
(when (buffer-live-p buf) (kill-buffer buf)))))
(ert-deftest test-ui-config-set-cursor-color-live-ghostel-not-orange ()
"Normal: in a live ghostel terminal the cursor-color hook picks a writeable
color, not the read-only orange -- even though the buffer is read-only.
`display-graphic-p' is stubbed t so the function reaches its work body in
batch mode (the live function no-ops on TTY frames by design)."
(let ((buf (cj/test--make-fake-ghostel-buffer "*test-ghostel-cursor-color*"))
(applied 'unset))
(unwind-protect
(with-current-buffer buf
(setq buffer-read-only t)
(setq-local ghostel--input-mode 'semi-char)
(let ((cj/-cursor-last-color nil)
(cj/-cursor-last-buffer nil))
(cl-letf (((symbol-function 'display-graphic-p) (lambda () t))
((symbol-function 'set-cursor-color)
(lambda (c) (setq applied c))))
(cj/set-cursor-color-according-to-mode)))
(should (stringp applied))
(should-not (equal applied
(alist-get 'read-only cj/buffer-status-colors))))
(when (buffer-live-p buf) (kill-buffer buf)))))
(provide 'test-ui-config--buffer-cursor-state)
;;; test-ui-config--buffer-cursor-state.el ends here
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