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;;; test-prog-webdev-format.el --- Tests for the webdev prettier formatter -*- lexical-binding: t; -*-
;;; Commentary:
;; Covers the prettier-formatting path in `modules/prog-webdev.el':
;; - `cj/--webdev-format-command' (pure: file -> "prettier --stdin-filepath ...")
;; - `cj/webdev-format-buffer' (interactive wrapper; `executable-find' and
;; `shell-command-on-region' stubbed)
;;
;; `cj/webdev-keybindings' (the C-; f mount) is already covered by
;; `test-prog-webdev--format-wiring.el'.
;;; 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))
(require 'testutil-format-wiring)
(format-test--ensure-packages-init)
(require 'prog-webdev)
;; --------------------------- cj/--webdev-format-command ----------------------
(ert-deftest test-prog-webdev--format-command-normal ()
"Normal: a plain .ts path yields the stdin-filepath prettier command."
(should (equal "prettier --stdin-filepath /home/me/app.ts"
(cj/--webdev-format-command "/home/me/app.ts"))))
(ert-deftest test-prog-webdev--format-command-spaces-quoted ()
"Boundary: a path with spaces is shell-quoted."
(should (equal (format "prettier --stdin-filepath %s"
(shell-quote-argument "/home/me/my app/index.tsx"))
(cj/--webdev-format-command "/home/me/my app/index.tsx"))))
(ert-deftest test-prog-webdev--format-command-tsx-extension ()
"Boundary: a .tsx path is passed through (prettier infers the parser)."
(should (equal "prettier --stdin-filepath /x/Component.tsx"
(cj/--webdev-format-command "/x/Component.tsx"))))
;; ---------------------------- cj/webdev-format-buffer ------------------------
(ert-deftest test-prog-webdev-format-buffer-runs-prettier-on-the-file ()
"Normal: with prettier on PATH, the region command targets `buffer-file-name'."
(let (cmd)
(cl-letf (((symbol-function 'executable-find) (lambda (_p) "/usr/bin/prettier"))
((symbol-function 'shell-command-on-region)
(lambda (_start _end command &rest _) (setq cmd command))))
(with-temp-buffer
(insert "const x=1\n")
(setq buffer-file-name "/home/me/app.ts")
(cj/webdev-format-buffer)
(setq buffer-file-name nil)))
(should (equal (cj/--webdev-format-command "/home/me/app.ts") cmd))))
(ert-deftest test-prog-webdev-format-buffer-falls-back-to-file-ts ()
"Boundary: a buffer with no file uses the \"file.ts\" filename hint."
(let (cmd)
(cl-letf (((symbol-function 'executable-find) (lambda (_p) "/usr/bin/prettier"))
((symbol-function 'shell-command-on-region)
(lambda (_start _end command &rest _) (setq cmd command))))
(with-temp-buffer
(insert "const x=1\n")
(should-not buffer-file-name)
(cj/webdev-format-buffer)))
(should (equal (cj/--webdev-format-command "file.ts") cmd))))
(ert-deftest test-prog-webdev-format-buffer-clamps-point-to-point-max ()
"Boundary: after a format that shrinks the buffer, point clamps to point-max."
(cl-letf (((symbol-function 'executable-find) (lambda (_p) "/usr/bin/prettier"))
((symbol-function 'shell-command-on-region)
(lambda (_start _end _command &rest _)
(delete-region (point-min) (point-max))
(insert "x"))))
(with-temp-buffer
(insert "a really long original buffer body that prettier will shorten\n")
(goto-char 40)
(cj/webdev-format-buffer)
(should (= (point) (point-max))))))
(ert-deftest test-prog-webdev-format-buffer-errors-without-prettier ()
"Error: prettier missing -> `user-error', nothing shells out."
(let ((ran nil))
(cl-letf (((symbol-function 'executable-find) (lambda (_p) nil))
((symbol-function 'shell-command-on-region)
(lambda (&rest _) (setq ran t))))
(with-temp-buffer
(should-error (cj/webdev-format-buffer) :type 'user-error)))
(should-not ran)))
(provide 'test-prog-webdev-format)
;;; test-prog-webdev-format.el ends here
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