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;;; help-fns-tests.el --- tests for help-fns.el -*- lexical-binding: t -*-
;; Copyright (C) 2014-2025 Free Software Foundation, Inc.
;; Maintainer: emacs-devel@gnu.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'ert)
(require 'help-fns)
(require 'subr-x)
(autoload 'help-fns-test--macro "foo" nil nil t)
;;; Several tests for describe-function
(defun help-fns-tests--describe-function (func)
"Helper function for `describe-function' tests.
FUNC is the function to describe, a symbol.
Return first line of the output of (describe-function-1 FUNC)."
(let ((string (with-output-to-string
(describe-function-1 func))))
(string-match "\\(.+\\)\n" string)
(match-string-no-properties 1 string)))
(ert-deftest help-fns-test-bug17410 ()
"Test for https://debbugs.gnu.org/17410 ."
(let ((regexp "autoloaded Lisp macro")
(result (help-fns-tests--describe-function 'help-fns-test--macro)))
(should (string-match regexp result))))
(ert-deftest help-fns-test-built-in ()
(let ((regexp "a primitive-function in .C source code")
(result (help-fns-tests--describe-function 'mapcar)))
(should (string-match regexp result))))
(ert-deftest help-fns-test-interactive-built-in ()
(let ((regexp "an interactive primitive-function in .C source code")
(result (help-fns-tests--describe-function 're-search-forward)))
(should (string-match regexp result))))
(ert-deftest help-fns-test-lisp-macro ()
(let ((regexp "a Lisp macro in .+subr\\.el")
(result (help-fns-tests--describe-function 'when)))
(should (string-match regexp result))))
(ert-deftest help-fns-test-lisp-defun ()
(let ((regexp "a \\([^ ]+\\) in .+subr\\.el")
(result (help-fns-tests--describe-function 'last)))
(should (string-match regexp result))
(should (member (match-string 1 result)
'("native-comp-function" "byte-code-function")))))
(ert-deftest help-fns-test-lisp-defsubst ()
(let ((regexp "a byte-code-function in .+subr\\.el")
(result (help-fns-tests--describe-function 'posn-window)))
(should (string-match regexp result))))
(ert-deftest help-fns-test-alias-to-defun ()
(let ((regexp "an alias for .set-file-modes. in .+subr\\.el")
(result (help-fns-tests--describe-function 'chmod)))
(should (string-match regexp result))))
(ert-deftest help-fns-test-bug23887 ()
"Test for https://debbugs.gnu.org/23887 ."
(let ((regexp "an alias for .re-search-forward. in .+subr\\.el")
(result (help-fns-tests--describe-function 'search-forward-regexp)))
(should (string-match regexp result))))
(ert-deftest help-fns-test-dangling-alias ()
"Make sure we don't burp on bogus aliases."
(let ((f (make-symbol "bogus-alias")))
(define-obsolete-function-alias f 'help-fns-test--undefined-function "past")
(describe-symbol f)))
;;; Test describe-function over functions with funny names
(defun abc\\\[universal-argument\]b\`c\'d\\e\"f (x)
"A function with a funny name.
\(fn XYZZY)"
x)
(defun defgh\\\[universal-argument\]b\`c\'d\\e\"f (x)
"Another function with a funny name."
x)
(ert-deftest help-fns-test-funny-names ()
"Test for help with functions with funny names."
(describe-function 'abc\\\[universal-argument\]b\`c\'d\\e\"f)
(with-current-buffer "*Help*"
(goto-char (point-min))
(should (search-forward
"(abc\\\\\\[universal-argument\\]b\\`c\\'d\\\\e\\\"f XYZZY)")))
(describe-function 'defgh\\\[universal-argument\]b\`c\'d\\e\"f)
(with-current-buffer "*Help*"
(goto-char (point-min))
(should (search-forward
"(defgh\\\\\\[universal-argument\\]b\\`c\\'d\\\\e\\\"f X)"))))
;;; Test for describe-symbol
(ert-deftest help-fns-test-describe-symbol ()
"Test the `describe-symbol' function."
;; 'describe-symbol' would originally signal an error for
;; 'font-lock-comment-face'.
(describe-symbol 'font-lock-comment-face)
(with-current-buffer "*Help*"
(should (> (point-max) 1))
(goto-char (point-min))
(should (looking-at "^font-lock-comment-face is "))))
(defvar foo-test-map)
(defvar help-fns-test--describe-keymap-foo)
;;; Tests for describe-keymap
(defvar-keymap help-fns-test-map
"a" 'test-cmd-a
"b" 'test-cmd-b
"c" 'test-cmd-c)
(ert-deftest help-fns-test-find-keymap-name ()
(should (equal (help-fns-find-keymap-name lisp-mode-map) 'lisp-mode-map))
;; Follow aliasing.
(unwind-protect
(progn
(defvaralias 'foo-test-map 'lisp-mode-map)
(should (equal (help-fns-find-keymap-name foo-test-map) 'lisp-mode-map)))
(makunbound 'foo-test-map)))
(ert-deftest help-fns-test-describe-keymap/symbol ()
(describe-keymap 'help-fns-test-map)
(with-current-buffer "*Help*"
(should (looking-at "^help-fns-test-map is"))
(should (re-search-forward (rx word-start "a" word-end
(+ blank)
word-start "test-cmd-a" word-end)
nil t))))
(ert-deftest help-fns-test-describe-keymap/value ()
(describe-keymap help-fns-test-map)
(with-current-buffer "*Help*"
(should (looking-at "\nKey"))))
(ert-deftest help-fns-test-describe-keymap/not-keymap ()
(should-error (describe-keymap nil))
(should-error (describe-keymap emacs-version))
(should-error (describe-keymap 'some-undefined-variable-foobar)))
(ert-deftest help-fns-test-describe-keymap/let-bound ()
(let ((foobar help-fns-test-map))
(describe-keymap foobar)
(with-current-buffer "*Help*"
(should (looking-at "\nKey")))))
(ert-deftest help-fns-test-describe-keymap/dynamically-bound-no-file ()
(setq help-fns-test--describe-keymap-foo help-fns-test-map)
(describe-keymap 'help-fns-test--describe-keymap-foo)
(with-current-buffer "*Help*"
(should (looking-at "^help-fns-test--describe-keymap-foo is"))))
;;; Tests for find-lisp-object-file-name
(ert-deftest help-fns-test-bug24697-function-search ()
(should-not (find-lisp-object-file-name 'tab-width 1)))
(ert-deftest help-fns-test-bug24697-non-internal-variable ()
(let ((help-fns--test-var (make-symbol "help-fns--test-var")))
;; simulate an internal variable
(put help-fns--test-var 'variable-documentation 1)
(should-not (find-lisp-object-file-name help-fns--test-var 'defface))
(should-not (find-lisp-object-file-name help-fns--test-var 1))))
(ert-deftest help-fns--analyze-function-recursive ()
(defalias 'help-fns--a 'help-fns--b)
(should (equal (help-fns--analyze-function 'help-fns--a)
'(help-fns--a help-fns--b t help-fns--b))))
;;; help-fns-tests.el ends here
|
