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| | ;;; eshell-tests-helpers.el --- Eshell test suite helpers -*- lexical-binding:t -*-
;; Copyright (C) 1999-2022 Free Software Foundation, Inc.
;; Author: John Wiegley <johnw@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:
;; Eshell test suite helpers.
;;; Code:
(require 'ert)
(require 'ert-x)
(require 'esh-mode)
(require 'eshell)
(defvar eshell-history-file-name nil)
(defvar eshell-test--max-subprocess-time 5
"The maximum amount of time to wait for a subprocess to finish, in seconds.
See `eshell-wait-for-subprocess'.")
(defmacro with-temp-eshell (&rest body)
"Evaluate BODY in a temporary Eshell buffer."
`(save-current-buffer
(ert-with-temp-directory eshell-directory-name
(let* (;; We want no history file, so prevent Eshell from falling
;; back on $HISTFILE.
(process-environment (cons "HISTFILE" process-environment))
(eshell-history-file-name nil)
(eshell-buffer (eshell t)))
(unwind-protect
(with-current-buffer eshell-buffer
,@body)
(let (kill-buffer-query-functions)
(kill-buffer eshell-buffer)))))))
(defun eshell-wait-for-subprocess (&optional all)
"Wait until there is no interactive subprocess running in Eshell.
If ALL is non-nil, wait until there are no Eshell subprocesses at
all running.
If this takes longer than `eshell-test--max-subprocess-time',
raise an error."
(let ((start (current-time)))
(while (if all eshell-process-list (eshell-interactive-process-p))
(when (> (float-time (time-since start))
eshell-test--max-subprocess-time)
(error "timed out waiting for subprocess(es)"))
(sit-for 0.1))))
(defun eshell-insert-command (command &optional func)
"Insert a COMMAND at the end of the buffer.
After inserting, call FUNC. If FUNC is nil, instead call
`eshell-send-input'."
(goto-char eshell-last-output-end)
(insert-and-inherit command)
(funcall (or func 'eshell-send-input)))
(defun eshell-match-output (regexp)
"Test whether the output of the last command matches REGEXP."
(string-match-p
regexp (buffer-substring-no-properties
(eshell-beginning-of-output) (eshell-end-of-output))))
(defun eshell-match-output--explainer (regexp)
"Explain the result of `eshell-match-output'."
`(mismatched-output
(command ,(buffer-substring-no-properties
eshell-last-input-start eshell-last-input-end))
(output ,(buffer-substring-no-properties
(eshell-beginning-of-output) (eshell-end-of-output)))
(regexp ,regexp)))
(put 'eshell-match-output 'ert-explainer #'eshell-match-output--explainer)
(defun eshell-match-command-output (command regexp &optional func)
"Insert a COMMAND at the end of the buffer and match the output with REGEXP."
(eshell-insert-command command func)
(eshell-wait-for-subprocess)
(should (eshell-match-output regexp)))
(defvar eshell-history-file-name)
(defun eshell-test-command-result (command)
"Like `eshell-command-result', but not using HOME."
(ert-with-temp-directory eshell-directory-name
(let ((eshell-history-file-name nil))
(eshell-command-result command))))
(defun eshell-command-result--equal (_command actual expected)
"Compare the ACTUAL result of a COMMAND with its EXPECTED value."
(equal actual expected))
(defun eshell-command-result--equal-explainer (command actual expected)
"Explain the result of `eshell-command-result--equal'."
`(nonequal-result
(command ,command)
(result ,actual)
(expected ,expected)))
(put 'eshell-command-result--equal 'ert-explainer
#'eshell-command-result--equal-explainer)
(defun eshell-command-result-equal (command result)
"Execute COMMAND non-interactively and compare it to RESULT."
(should (eshell-command-result--equal
command
(eshell-test-command-result command)
result)))
(provide 'eshell-tests-helpers)
;;; eshell-tests-helpers.el ends here
|