test/automated/process-tests.el

   1 ;;; process-tests.el --- Testing the process facilities
   2
   3 ;; Copyright (C) 2013-2014 Free Software Foundation, Inc.
   4
   5 ;; This program is free software; you can redistribute it and/or modify
   6 ;; it under the terms of the GNU General Public License as published by
   7 ;; the Free Software Foundation, either version 3 of the License, or
   8 ;; (at your option) any later version.
   9
  10 ;; This program is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;; GNU General Public License for more details.
  14
  15 ;; You should have received a copy of the GNU General Public License
  16 ;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 ;;; Commentary:
  19
  20 ;;
  21
  22 ;;; Code:
  23
  24 (require 'ert)
  25
  26 ;; Timeout in seconds; the test fails if the timeout is reached.
  27 (defvar process-test-sentinel-wait-timeout 2.0)
  28
  29 ;; Start a process that exits immediately.  Call WAIT-FUNCTION,
  30 ;; possibly multiple times, to wait for the process to complete.
  31 (defun process-test-sentinel-wait-function-working-p (wait-function)
  32   (let ((proc (start-process "test" nil "bash" "-c" "exit 20"))
  33         (sentinel-called nil)
  34         (start-time (float-time)))
  35     (set-process-sentinel proc (lambda (proc msg)
  36                                  (setq sentinel-called t)))
  37     (while (not (or sentinel-called
  38                     (> (- (float-time) start-time)
  39                        process-test-sentinel-wait-timeout)))
  40       (funcall wait-function))
  41     (cl-assert (eq (process-status proc) 'exit))
  42     (cl-assert (= (process-exit-status proc) 20))
  43     sentinel-called))
  44
  45 (ert-deftest process-test-sentinel-accept-process-output ()
  46   (should (process-test-sentinel-wait-function-working-p
  47            #'accept-process-output)))
  48
  49 (ert-deftest process-test-sentinel-sit-for ()
  50   (should
  51    (process-test-sentinel-wait-function-working-p (lambda () (sit-for 0.01 t)))))
  52
  53 (provide 'process-tests)