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;;; test-custom-buffer-file-copy-buffer-source.el --- Tests for cj/copy-buffer-source-as-kill -*- lexical-binding: t; -*-
;;; Commentary:
;; Tests the dispatch behavior of `cj/copy-buffer-source-as-kill', the
;; major-mode-aware extension of the old
;; `cj/copy-path-to-buffer-file-as-kill' (which is kept as a
;; `defalias' for backwards compat).
;;
;; Dispatch tiers:
;; eww-mode -> (eww-current-url)
;; elfeed-show-mode -> (elfeed-entry-link elfeed-show-entry)
;; dired-mode -> (dired-get-filename nil t)
;; dirvish-mode -> (dired-get-filename nil t)
;; doc-view-mode -> buffer-file-name
;; pdf-view-mode -> buffer-file-name
;; anything else -> buffer-file-name fallback (errors if nil)
;;; Code:
(require 'ert)
(require 'cl-lib)
(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
(require 'custom-buffer-file)
;; Top-level defvars so let-bindings reach the dynamic var under
;; lexical scope (and stand-ins for vars defined in modes we don't
;; require here).
(defvar elfeed-show-entry nil)
;;; Fallback to buffer-file-name
(ert-deftest test-copy-buffer-source-falls-back-to-buffer-file-name ()
"Normal: a file-visiting buffer with no special dispatch falls back
to `buffer-file-name'."
(let (kill-ring)
(with-temp-buffer
(setq buffer-file-name "/tmp/notes.txt")
(fundamental-mode)
(cl-letf (((symbol-function 'message) #'ignore))
(cj/copy-buffer-source-as-kill))
(should (equal (car kill-ring) "/tmp/notes.txt")))))
(ert-deftest test-copy-buffer-source-errors-on-nil-source ()
"Error: a buffer with no file and no mode dispatch signals a user-error."
(with-temp-buffer
(fundamental-mode)
(setq buffer-file-name nil)
(should-error (cj/copy-buffer-source-as-kill) :type 'user-error)))
;;; eww-mode dispatch
(ert-deftest test-copy-buffer-source-eww-copies-current-url ()
"Normal: in eww-mode, copy `(eww-current-url)'."
(let (kill-ring)
(cl-letf (((symbol-function 'eww-current-url)
(lambda () "https://example.org/article")))
(with-temp-buffer
(setq major-mode 'eww-mode)
(cl-letf (((symbol-function 'message) #'ignore))
(cj/copy-buffer-source-as-kill))
(should (equal (car kill-ring) "https://example.org/article"))))))
;;; elfeed-show-mode dispatch
(ert-deftest test-copy-buffer-source-elfeed-copies-entry-link ()
"Normal: in elfeed-show-mode, copy the entry's link."
(let ((kill-ring nil)
(elfeed-show-entry (list :link "https://feed.test/post/42")))
(cl-letf (((symbol-function 'elfeed-entry-link)
(lambda (entry) (plist-get entry :link))))
(with-temp-buffer
(setq major-mode 'elfeed-show-mode)
(cl-letf (((symbol-function 'message) #'ignore))
(cj/copy-buffer-source-as-kill))
(should (equal (car kill-ring) "https://feed.test/post/42"))))))
;;; dired-mode dispatch
(ert-deftest test-copy-buffer-source-dired-copies-file-at-point ()
"Normal: in dired-mode, copy the absolute path of the file at point
(not the dired buffer's `default-directory')."
(let (kill-ring)
(cl-letf (((symbol-function 'dired-get-filename)
(lambda (&optional _localp _no-error)
"/home/u/projects/notes.org")))
(with-temp-buffer
(setq major-mode 'dired-mode)
(cl-letf (((symbol-function 'message) #'ignore))
(cj/copy-buffer-source-as-kill))
(should (equal (car kill-ring) "/home/u/projects/notes.org"))))))
(ert-deftest test-copy-buffer-source-dirvish-copies-file-at-point ()
"Normal: dirvish-mode dispatches identically to dired-mode."
(let (kill-ring)
(cl-letf (((symbol-function 'dired-get-filename)
(lambda (&optional _localp _no-error)
"/home/u/books/the-book.epub")))
(with-temp-buffer
(setq major-mode 'dirvish-mode)
(cl-letf (((symbol-function 'message) #'ignore))
(cj/copy-buffer-source-as-kill))
(should (equal (car kill-ring) "/home/u/books/the-book.epub"))))))
;;; doc-view / pdf-view dispatch
(ert-deftest test-copy-buffer-source-doc-view-copies-buffer-file ()
"Normal: doc-view-mode copies the underlying file path
(`buffer-file-name')."
(let (kill-ring)
(with-temp-buffer
(setq buffer-file-name "/home/u/papers/paper.pdf"
major-mode 'doc-view-mode)
(cl-letf (((symbol-function 'message) #'ignore))
(cj/copy-buffer-source-as-kill))
(should (equal (car kill-ring) "/home/u/papers/paper.pdf")))))
(ert-deftest test-copy-buffer-source-pdf-view-copies-buffer-file ()
"Normal: pdf-view-mode copies the underlying file path."
(let (kill-ring)
(with-temp-buffer
(setq buffer-file-name "/home/u/books/manual.pdf"
major-mode 'pdf-view-mode)
(cl-letf (((symbol-function 'message) #'ignore))
(cj/copy-buffer-source-as-kill))
(should (equal (car kill-ring) "/home/u/books/manual.pdf")))))
;;; Backwards-compat alias
(ert-deftest test-copy-path-old-name-aliases-new-command ()
"Backwards compat: `cj/copy-path-to-buffer-file-as-kill' still
resolves to the new `cj/copy-buffer-source-as-kill' via defalias."
(should (eq (symbol-function 'cj/copy-path-to-buffer-file-as-kill)
'cj/copy-buffer-source-as-kill)))
;;; Keybinding
(ert-deftest test-copy-buffer-source-bound-on-b-p ()
"Normal: `p' in `cj/buffer-and-file-map' invokes the new command."
(should (eq (keymap-lookup cj/buffer-and-file-map "p")
#'cj/copy-buffer-source-as-kill)))
(provide 'test-custom-buffer-file-copy-buffer-source)
;;; test-custom-buffer-file-copy-buffer-source.el ends here
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