emacs/test/lisp/comint-tests.el

;;; comint-tests.el --- Tests for comint.el  -*- lexical-binding:t -*-

;; Copyright (C) 2010-2024 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

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;; 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.

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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; 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:

;; Tests for comint and related modes.

;;; Code:

(require 'comint)
(require 'ert)

(defvar comint-testsuite-password-strings
  '("foo@example.net's password: " ; ssh
    "Password for foo@example.org: " ; kinit
    "Password for 'https://foo@example.org':"           ; git push Bug#20910
    "Please enter the password for foo@example.org: "   ; kinit
    "Kerberos password for devnull/root <at> GNU.ORG: " ; ksu
    "Enter passphrase: " ; ssh-add
    "Enter passphrase (empty for no passphrase): " ; ssh-keygen
    "Enter same passphrase again: "     ; ssh-keygen
    "Enter your password: "             ; python3 -m twine ... Bug#37636
    "Passphrase for key root@GNU.ORG: " ; plink
    "[sudo] password for user:" ; Ubuntu sudo
    "[sudo] user 的密码：" ; localized
    "doas (user@host) password:" ; OpenBSD doas
    "PIN for user:"        ; Bug#35523
    "Password (again):"
    "Enter password:"
    "(user@host) Password: " ; openssh-8.6p1
    "Current password:"    ; "passwd" (to change password) in Debian.
    "Enter encryption key: " ; ccrypt
    "Enter decryption key: " ; ccrypt
    "Enter encryption key: (repeat) " ; ccrypt
    "Enter Auth Password:" ; OpenVPN (Bug#35724)
    "Verify password: "    ; zip -e zipfile.zip ... (Bug#47209)
    "Mot de Passe :" ; localized (Bug#29729)
    "Passwort:") ; localized
  "List of strings that should match `comint-password-prompt-regexp'.")

(ert-deftest comint-test-password-regexp ()
  "Test `comint-password-prompt-regexp' against common password strings."
  (dolist (str comint-testsuite-password-strings)
    (should (string-match comint-password-prompt-regexp str))))

(declare-function w32-application-type "w32proc.c")
(defun w32-native-executable-p (fname)
  "Predicate to test program FNAME for being a native Windows application."
  (and (memq (w32-application-type fname) '(w32-native dos))
       (file-executable-p fname)))

(defun w32-native-executable-find (name)
  "Find a native MS-Windows application named NAME.
This is needed to avoid invoking MSYS or Cygwin executables that
happen to lurk on PATH when running the test suite."
  (locate-file name exec-path exec-suffixes 'w32-native-executable-p))

(defun comint-tests/test-password-function (password-function)
  "PASSWORD-FUNCTION can return nil or a string."
  (when-let* ((cat (if (eq system-type 'windows-nt)
                       (w32-native-executable-find "cat")
                     (executable-find "cat"))))
    (let ((comint-password-function password-function))
      (cl-letf (((symbol-function 'read-passwd)
                 (lambda (&rest _args) "non-nil")))
        (with-temp-buffer
          (make-comint-in-buffer "test-comint-password" (current-buffer) cat)
          (let ((proc (get-buffer-process (current-buffer))))
            (set-process-query-on-exit-flag proc nil)
            (set-process-query-on-exit-flag proc nil)
            (comint-send-invisible "Password: ")
            (accept-process-output proc 0.1)
            (should (string-equal
                     (buffer-substring-no-properties (point-min) (point-max))
                     (concat (or (and password-function
                                      (funcall password-function))
                                 "non-nil")
                             "\n")))))))))

(ert-deftest comint-test-no-password-function ()
  "Test that `comint-password-function' not being set does not
alter normal password flow."
  (comint-tests/test-password-function nil))

(ert-deftest comint-test-password-function-with-value ()
  "Test that `comint-password-function' alters normal password
flow.  Hook function returns alternative password."
  (comint-tests/test-password-function
   (lambda (&rest _args) "MaGiC-PaSsWoRd789")))

(ert-deftest comint-test-password-function-with-nil ()
  "Test that `comint-password-function' does not alter the normal
password flow if it returns a nil value."
  (comint-tests/test-password-function #'ignore))

;;; comint-tests.el ends here