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;;; test-custom-whitespace-public-wrappers.el --- Tests for the interactive whitespace dispatchers -*- lexical-binding: t; -*-
;;; Commentary:
;; The internal `cj/--*' helpers are exhaustively covered in the
;; sibling test files. This file covers the six interactive
;; dispatchers that route a current-line / region / whole-buffer
;; selection into the appropriate helper:
;;
;; cj/remove-leading-trailing-whitespace
;; cj/collapse-whitespace-line-or-region
;; cj/ensure-single-blank-line
;; cj/delete-blank-lines-region-or-buffer
;; cj/delete-all-whitespace
;; cj/hyphenate-whitespace-in-region
;;
;; `yes-or-no-p' is stubbed for the two prompts; `use-region-p' and
;; the region delimiters are exercised via real `with-temp-buffer'
;; state.
;;; Code:
(require 'ert)
(require 'cl-lib)
(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
(require 'custom-whitespace)
;;; cj/remove-leading-trailing-whitespace
(ert-deftest test-custom-whitespace-wrapper-remove-line-only ()
"Normal: with no region and no prefix, the wrapper trims the current line only."
(with-temp-buffer
(insert " hello \n keep \n")
(goto-char (point-min))
(cj/remove-leading-trailing-whitespace)
(should (equal (buffer-string) "hello\n keep \n"))))
(ert-deftest test-custom-whitespace-wrapper-remove-region ()
"Normal: with an active region, the wrapper trims inside the region."
(with-temp-buffer
(let ((transient-mark-mode t))
(insert " alpha \n beta \n")
(push-mark (point-min) t t)
(goto-char (line-end-position 2))
(cj/remove-leading-trailing-whitespace))
(should (string-match-p "alpha" (buffer-string)))
(should-not (string-match-p " alpha " (buffer-string)))))
(ert-deftest test-custom-whitespace-wrapper-remove-whole-buffer-with-prefix ()
"Normal: a prefix argument widens the operation to the whole buffer."
(with-temp-buffer
(insert " alpha \n beta \n")
(let ((current-prefix-arg '(4)))
(cj/remove-leading-trailing-whitespace))
(should (equal (buffer-string) "alpha\nbeta\n"))))
;;; cj/collapse-whitespace-line-or-region
(ert-deftest test-custom-whitespace-wrapper-collapse-line-only ()
"Normal: with no region, the wrapper collapses whitespace on the current line."
(with-temp-buffer
(insert " alpha beta \n keep here \n")
(goto-char (point-min))
(cj/collapse-whitespace-line-or-region)
(should (equal (buffer-string) "alpha beta\n keep here \n"))))
(ert-deftest test-custom-whitespace-wrapper-collapse-region ()
"Normal: with an active region, the wrapper collapses inside it only."
(with-temp-buffer
(let ((transient-mark-mode t))
(insert " alpha beta \n outside \n")
(goto-char (point-min))
(push-mark (point) t t)
(goto-char (line-end-position))
(cj/collapse-whitespace-line-or-region))
;; First line collapsed, second untouched.
(should (string-match-p "^alpha beta\n" (buffer-string)))
(should (string-match-p " outside \n" (buffer-string)))))
;;; cj/ensure-single-blank-line
(ert-deftest test-custom-whitespace-wrapper-single-blank-region ()
"Normal: with an active region, the wrapper collapses blank-line runs in it."
(with-temp-buffer
(insert "a\n\n\n\nb\n")
(push-mark (point-min) t t)
(goto-char (point-max))
(cj/ensure-single-blank-line (region-beginning) (region-end))
(should (equal (buffer-string) "a\n\nb\n"))))
(ert-deftest test-custom-whitespace-wrapper-single-blank-whole-buffer-yes ()
"Normal: outside a region, an affirmative prompt operates on the whole buffer."
(with-temp-buffer
(insert "a\n\n\n\nb\n\n\nc\n")
(cl-letf (((symbol-function 'yes-or-no-p) (lambda (&rest _) t)))
(call-interactively #'cj/ensure-single-blank-line))
(should (equal (buffer-string) "a\n\nb\n\nc\n"))))
(ert-deftest test-custom-whitespace-wrapper-single-blank-decline-aborts ()
"Error: outside a region, declining the prompt raises `user-error'."
(with-temp-buffer
(insert "a\n\n\nb\n")
(cl-letf (((symbol-function 'yes-or-no-p) (lambda (&rest _) nil)))
(should-error (call-interactively #'cj/ensure-single-blank-line)
:type 'user-error))))
;;; cj/delete-blank-lines-region-or-buffer
(ert-deftest test-custom-whitespace-wrapper-delete-blank-region ()
"Normal: with a region, blank lines inside it are deleted."
(with-temp-buffer
(insert "a\n\n\nb\n")
(push-mark (point-min) t t)
(goto-char (point-max))
(cj/delete-blank-lines-region-or-buffer (region-beginning) (region-end))
(should (equal (buffer-string) "a\nb\n"))))
(ert-deftest test-custom-whitespace-wrapper-delete-blank-whole-buffer-yes ()
"Normal: outside a region, an affirmative prompt deletes blank lines buffer-wide."
(with-temp-buffer
(insert "a\n\n\nb\n\n\nc\n")
(cl-letf (((symbol-function 'yes-or-no-p) (lambda (&rest _) t)))
(call-interactively #'cj/delete-blank-lines-region-or-buffer))
(should (equal (buffer-string) "a\nb\nc\n"))))
(ert-deftest test-custom-whitespace-wrapper-delete-blank-decline-aborts ()
"Error: outside a region, declining the prompt raises `user-error'."
(with-temp-buffer
(insert "a\n\n\nb\n")
(cl-letf (((symbol-function 'yes-or-no-p) (lambda (&rest _) nil)))
(should-error (call-interactively #'cj/delete-blank-lines-region-or-buffer)
:type 'user-error))))
;;; cj/delete-all-whitespace
(ert-deftest test-custom-whitespace-wrapper-delete-all-region ()
"Normal: with an active region, all whitespace inside it is removed."
(with-temp-buffer
(let ((transient-mark-mode t))
(insert "a b\nc\td \n")
(goto-char (point-min))
(push-mark (point) t t)
(goto-char (point-max))
(cj/delete-all-whitespace (region-beginning) (region-end)))
(should (equal (buffer-string) "abcd"))))
(ert-deftest test-custom-whitespace-wrapper-delete-all-no-region-messages ()
"Boundary: without an active region, the wrapper messages and no-ops."
(with-temp-buffer
(insert "a b\n")
(let ((msg nil))
(cl-letf (((symbol-function 'message)
(lambda (fmt &rest args) (setq msg (apply #'format fmt args)))))
(cj/delete-all-whitespace (point-min) (point-max)))
(should (string-match-p "No region" msg)))
(should (equal (buffer-string) "a b\n"))))
;;; cj/hyphenate-whitespace-in-region
(ert-deftest test-custom-whitespace-wrapper-hyphenate-region ()
"Normal: with an active region, whitespace runs are replaced by hyphens."
(with-temp-buffer
(let ((transient-mark-mode t))
(insert "hello world\tfoo bar")
(goto-char (point-min))
(push-mark (point) t t)
(goto-char (point-max))
(cj/hyphenate-whitespace-in-region (region-beginning) (region-end)))
(should (equal (buffer-string) "hello-world-foo-bar"))))
(ert-deftest test-custom-whitespace-wrapper-hyphenate-no-region-messages ()
"Boundary: without an active region, the wrapper messages and no-ops."
(with-temp-buffer
(insert "no region here")
(let ((msg nil))
(cl-letf (((symbol-function 'message)
(lambda (fmt &rest args) (setq msg (apply #'format fmt args)))))
(cj/hyphenate-whitespace-in-region (point-min) (point-max)))
(should (string-match-p "No region" msg)))
(should (equal (buffer-string) "no region here"))))
(provide 'test-custom-whitespace-public-wrappers)
;;; test-custom-whitespace-public-wrappers.el ends here
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