;;; network-stream-tests.el --- tests for network processes       -*- lexical-binding: t; -*-

;; Copyright (C) 2016 Free Software Foundation, Inc.

;; Author: Lars Ingebrigtsen <larsi@gnus.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 <http://www.gnu.org/licenses/>.

;;; Commentary:


;;; Code:

(require 'gnutls)

(ert-deftest make-local-unix-server ()
  (skip-unless (featurep 'make-network-process '(:family local)))
  (let* ((file (make-temp-name "/tmp/server-test"))
         (server
          (make-network-process
           :name "server"
           :server t
           :buffer (get-buffer-create "*server*")
           :noquery t
           :family 'local
           :service file)))
    (should (equal (process-contact server :local) file))
    (delete-file (process-contact server :local))))

(ert-deftest make-local-tcp-server-with-unspecified-port ()
  (let ((server
         (make-network-process
          :name "server"
          :server t
          :noquery t
          :family 'ipv4
          :service t
          :host 'local)))
    (should (and (arrayp (process-contact server :local))
                 (numberp (aref (process-contact server :local) 4))
                 (> (aref (process-contact server :local) 4) 0)))
    (delete-process server)))

(ert-deftest make-local-tcp-server-with-specified-port ()
  (let ((server
         (make-network-process
          :name "server"
          :server t
          :noquery t
          :family 'ipv4
          :service 57869
          :host 'local)))
    (should (and (arrayp (process-contact server :local))
                 (= (aref (process-contact server :local) 4) 57869)))
    (delete-process server)))

(defun make-server (host)
  (make-network-process
   :name "server"
   :server t
   :noquery t
   :family 'ipv4
   :coding 'raw-text-unix
   :buffer (get-buffer-create "*server*")
   :service t
   :sentinel 'server-sentinel
   :filter 'server-process-filter
   :host host))

(defun server-sentinel (_proc _msg)
  )

(defun server-process-filter (proc string)
  (message "Received %s" string)
  (let ((prev (process-get proc 'previous-string)))
    (when prev
      (setq string (concat prev string))
      (process-put proc 'previous-string nil)))
  (if (and (not (string-match "\n" string))
           (> (length string) 0))
      (process-put proc 'previous-string string))
  (let ((command (split-string string)))
    (cond
     ((equal (car command) "echo")
      (process-send-string proc (concat (cadr command) "\n")))
     (t
      ))))

(ert-deftest echo-server-with-dns ()
  (let* ((server (make-server (system-name)))
         (port (aref (process-contact server :local) 4))
         (proc (make-network-process :name "foo"
                                     :buffer (generate-new-buffer "*foo*")
                                     :host (system-name)
                                     :service port)))
    (with-current-buffer (process-buffer proc)
      (process-send-string proc "echo foo")
      (sleep-for 0.1)
      (should (equal (buffer-string) "foo\n")))
    (delete-process server)))

(ert-deftest echo-server-with-localhost ()
  (let* ((server (make-server 'local))
         (port (aref (process-contact server :local) 4))
         (proc (make-network-process :name "foo"
                                     :buffer (generate-new-buffer "*foo*")
                                     :host "localhost"
                                     :service port)))
    (with-current-buffer (process-buffer proc)
      (process-send-string proc "echo foo")
      (sleep-for 0.1)
      (should (equal (buffer-string) "foo\n")))
    (delete-process server)))

(ert-deftest echo-server-with-ip ()
  (let* ((server (make-server 'local))
         (port (aref (process-contact server :local) 4))
         (proc (make-network-process :name "foo"
                                     :buffer (generate-new-buffer "*foo*")
                                     :host "127.0.0.1"
                                     :service port)))
    (with-current-buffer (process-buffer proc)
      (process-send-string proc "echo foo")
      (sleep-for 0.1)
      (should (equal (buffer-string) "foo\n")))
    (delete-process server)))

(ert-deftest echo-server-nowait ()
  (let* ((server (make-server 'local))
         (port (aref (process-contact server :local) 4))
         (proc (make-network-process :name "foo"
                                     :buffer (generate-new-buffer "*foo*")
                                     :host "localhost"
                                     :nowait t
                                     :service port)))
    (should (eq (process-status proc) 'connect))
    (should (null (ignore-errors
                    (process-send-string proc "echo bar")
                    t)))
    (while (eq (process-status proc) 'connect)
      (sit-for 0.1))
    (with-current-buffer (process-buffer proc)
      (process-send-string proc "echo foo")
      (sleep-for 0.1)
      (should (equal (buffer-string) "foo\n")))
    (delete-process server)))

(defun make-tls-server ()
  (start-process "gnutls" (generate-new-buffer "*tls*")
                 "gnutls-serv" "--http"
                 "--x509keyfile" "lisp/net/key.pem"
                 "--x509certfile" "lisp/net/cert.pem"
                 "--port" "44330"))

(ert-deftest connect-to-tls-ipv4-wait ()
  (skip-unless (executable-find "gnutls-serv"))
  (skip-unless (gnutls-available-p))
  (let ((server (make-tls-server))
        (times 0)
        proc status)
    (sleep-for 1)
    (with-current-buffer (process-buffer server)
      (message "gnutls-serv: %s" (buffer-string)))

    ;; It takes a while for gnutls-serv to start.
    (while (and (null (ignore-errors
                        (setq proc (make-network-process
                                    :name "bar"
                                    :buffer (generate-new-buffer "*foo*")
                                    :host "localhost"
                                    :service 44330))))
                (< (setq times (1+ times)) 10))
      (sit-for 0.1))
    (should proc)
    (gnutls-negotiate :process proc
                      :type 'gnutls-x509pki
                      :hostname "localhost")
    (delete-process server)
    (setq status (gnutls-peer-status proc))
    (should (consp status))
    (delete-process proc)
    ;; This sleep-for is needed for the native MS-Windows build.  If
    ;; it is removed, the next test mysteriously fails because the
    ;; initial part of the echo is not received.
    (sleep-for 0.1)
    (let ((issuer (plist-get (plist-get status :certificate) :issuer)))
      (should (stringp issuer))
      (setq issuer (split-string issuer ","))
      (should (equal (nth 3 issuer) "O=Emacs Test Servicess LLC")))))

(ert-deftest connect-to-tls-ipv6-nowait ()
  (skip-unless (executable-find "gnutls-serv"))
  (skip-unless (gnutls-available-p))
  (skip-unless (not (eq system-type 'windows-nt)))
  (let ((server (make-tls-server))
        (times 0)
        proc status)
    (sleep-for 1)
    (with-current-buffer (process-buffer server)
      (message "gnutls-serv: %s" (buffer-string)))

    ;; It takes a while for gnutls-serv to start.
    (while (and (null (ignore-errors
                        (setq proc (make-network-process
                                    :name "bar"
                                    :buffer (generate-new-buffer "*foo*")
                                    :family 'ipv6
                                    :nowait t
                                    :host "::1"
                                    :service 44330))))
                (< (setq times (1+ times)) 10))
      (sit-for 0.1))
    (should proc)
    (gnutls-negotiate :process proc
                      :type 'gnutls-x509pki
                      :hostname "localhost")
    (delete-process server)
    (setq status (gnutls-peer-status proc))
    (should (consp status))
    (delete-process proc)
    (let ((issuer (plist-get (plist-get status :certificate) :issuer)))
      (should (stringp issuer))
      (setq issuer (split-string issuer ","))
      (should (equal (nth 3 issuer) "O=Emacs Test Servicess LLC")))))

;;; network-stream-tests.el ends here