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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>.
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix 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 Guix 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 Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu tests vnc)
+ #:use-module (gnu bootloader)
+ #:use-module (gnu bootloader grub)
+ #:use-module (gnu packages)
+ #:use-module (gnu packages ocr)
+ #:use-module (gnu packages glib)
+ #:use-module (gnu packages gnome)
+ #:use-module (gnu packages ratpoison)
+ #:use-module (gnu packages vnc)
+ #:use-module (gnu packages xorg)
+ #:use-module (gnu services)
+ #:use-module (gnu services dbus)
+ #:use-module (gnu services desktop)
+ #:use-module (gnu services networking)
+ #:use-module (gnu services ssh)
+ #:use-module (gnu services vnc)
+ #:use-module (gnu services xorg)
+ #:use-module (gnu system)
+ #:use-module (gnu system file-systems)
+ #:use-module (gnu system shadow)
+ #:use-module (gnu system vm)
+ #:use-module (gnu tests)
+ #:use-module (guix gexp)
+ #:use-module (guix modules)
+ #:export (%test-xvnc))
+
+(define %xvnc-os
+ (operating-system
+ ;; Usual boilerplate.
+ (host-name "komputilo")
+ (timezone "Europe/Berlin")
+ (locale "en_US.UTF-8")
+ (bootloader (bootloader-configuration
+ (bootloader grub-bootloader)
+ (targets '("/dev/sdX"))))
+ (file-systems (cons (file-system
+ (device (file-system-label "my-root"))
+ (mount-point "/")
+ (type "ext4"))
+ %base-file-systems))
+
+ (users (cons (user-account
+ (name "dummy")
+ (group "users")
+ (supplementary-groups '("wheel" "netdev"
+ "audio" "video")))
+ %base-user-accounts))
+ (packages (cons* dbus ;for dbus-run-session
+ dconf
+ `(,glib "bin")
+ glib
+ gnome-settings-daemon ;for schemas
+ ratpoison
+ tigervnc-client
+ xterm
+ %base-packages))
+ (services (cons*
+ (service openssh-service-type (openssh-configuration
+ (permit-root-login #t)
+ (allow-empty-passwords? #t)))
+ (service xvnc-service-type (xvnc-configuration
+ (display-number 5)
+ (security-types (list "None"))
+ (log-level 100)
+ (localhost? #f)
+ (xdmcp? #t)
+ (inetd? #t)))
+ (modify-services %desktop-services
+ (gdm-service-type config => (gdm-configuration
+ (inherit config)
+ (auto-login? #t)
+ (auto-suspend? #f)
+ (default-user "root")
+ (debug? #t)
+ (xdmcp? #t))))))))
+
+(define (run-xvnc-test)
+ "Run tests in %XVNC-OS."
+
+ (define os (marionette-operating-system
+ %xvnc-os
+ #:imported-modules (source-module-closure
+ '((gnu services herd)))))
+
+ (define vm (virtual-machine
+ (operating-system os)
+ (memory-size 1024)))
+
+ (define test
+ (with-imported-modules (source-module-closure
+ '((gnu build marionette)
+ (guix build utils)))
+ #~(begin
+ (use-modules (gnu build marionette)
+ (guix build utils)
+ (srfi srfi-26)
+ (srfi srfi-64))
+
+ (let ((marionette (make-marionette (list #$vm))))
+
+ (test-runner-current (system-test-runner #$output))
+ (test-begin "xvnc")
+
+ (test-assert "service running"
+ (marionette-eval
+ '(begin
+ (use-modules (gnu services herd))
+ (start-service 'xvnc))
+ marionette))
+
+ (test-assert "wait for port 5905, IPv4"
+ (wait-for-tcp-port 5905 marionette))
+
+ (test-assert "wait for port 5905, IPv6"
+ (wait-for-tcp-port 5905 marionette
+ #:address
+ '(make-socket-address
+ AF_INET6 (inet-pton AF_INET6 "::1") 5905)))
+
+ (test-assert "gdm auto-suspend is disabled"
+ ;; More a GDM than a Xvnc test, but since it's a cross-cutting
+ ;; concern and we have everything set up here, we might as well
+ ;; check it here.
+ (marionette-eval
+ '(begin
+ ;; Check that DCONF_PROFILE is set...
+ (invoke "/bin/sh" "-lc" "\
+pgrep gdm | head -n1 | xargs -I{} grep -Fq DCONF_PROFILE /proc/{}/environ")
+
+ ;; ... and that
+ (invoke "/bin/sh" "-lc" "\
+sudo -E -u gdm env DCONF_PROFILE=/etc/dconf/profile/gdm dbus-run-session \
+gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type \
+| grep -Fq nothing"))
+ marionette))
+
+ (test-assert "vnc lands on the gdm login screen"
+ ;; This test runs vncviewer on the local VM and verifies that it
+ ;; manages to access the GDM login screen (via XDMCP).
+ (begin
+ (define (ratpoison-abort)
+ (marionette-control "sendkey ctrl-g" marionette))
+
+ (define (ratpoison-help)
+ (marionette-control "sendkey ctrl-t" marionette)
+ (marionette-type "?" marionette)
+ (sleep 1)) ;wait for help screen to appear
+
+ (define (ratpoison-exec command)
+ (marionette-control "sendkey ctrl-t" marionette)
+ (marionette-type "!" marionette)
+ (marionette-type (string-append command "\n") marionette))
+
+ ;; Wait until the ratpoison help screen can be displayed; this
+ ;; means the window manager is ready.
+ (wait-for-screen-text marionette
+ (cut string-contains <> "key bindings")
+ #:ocr #$(file-append tesseract-ocr
+ "/bin/tesseract")
+ #:pre-action ratpoison-help
+ #:post-action ratpoison-abort)
+
+ ;; Run vncviewer and expect the GDM login screen (accessed via
+ ;; XDMCP). This can take a while to appear on slower machines.
+ (ratpoison-exec "vncviewer localhost:5905")
+ ;; XXX: tesseract narrowly recognizes "Guix" as "uix" from the
+ ;; background image; ocrad fares worst. Sadly, 'Username' is
+ ;; not recognized at all.
+ (wait-for-screen-text marionette
+ (cut string-contains <> "uix")
+ #:ocr #$(file-append tesseract-ocr
+ "/bin/tesseract")
+ #:timeout 120)))
+
+ (test-end)))))
+
+ (gexp->derivation "xvnc-test" test))
+
+(define %test-xvnc
+ (system-test
+ (name "xvnc")
+ (description "Basic tests for the Xvnc service. One of the tests validate
+that XDMCP works with GDM, and is therefore heavy in terms of disk and memory
+requirements.")
+ (value (run-xvnc-test))))
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