[PATCH]: tests: Add opensmtpd-service-type test

[iyzsong@openmailbox.org]

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My first system test patch, TIA for review!

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From 6107b011ee9f0fc445aeceeab38b963c6cf84b3a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=8B=E6=96=87=E6=AD=A6?= <iyzsong@member.fsf.org>
Date: Sat, 26 Nov 2016 13:51:58 +0800
Subject: [PATCH] tests: Add 'opensmtpd-service-type' test.

* gnu/tests/mail.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
---
 gnu/local.mk       |   1 +
 gnu/tests/mail.scm | 159 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 160 insertions(+)
 create mode 100644 gnu/tests/mail.scm

diff --git a/gnu/local.mk b/gnu/local.mk
index 4913727..ef32751 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -447,6 +447,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/tests.scm					\
   %D%/tests/base.scm				\
   %D%/tests/install.scm				\
+  %D%/tests/mail.scm				\
   %D%/tests/ssh.scm
 
 
diff --git a/gnu/tests/mail.scm b/gnu/tests/mail.scm
new file mode 100644
index 0000000..47328a5
--- /dev/null
+++ b/gnu/tests/mail.scm
@@ -0,0 +1,159 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2016 Sou Bunnbu <iyzsong@member.fsf.org>
+;;;
+;;; 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 mail)
+  #:use-module (gnu tests)
+  #:use-module (gnu system)
+  #:use-module (gnu system file-systems)
+  #:use-module (gnu system grub)
+  #:use-module (gnu system vm)
+  #:use-module (gnu services)
+  #:use-module (gnu services base)
+  #:use-module (gnu services mail)
+  #:use-module (gnu services networking)
+  #:use-module (guix gexp)
+  #:use-module (guix monads)
+  #:use-module (guix store)
+  #:export (%test-opensmtpd))
+
+(define %opensmtpd-os
+  (operating-system
+    (host-name "komputilo")
+    (timezone "Europe/Berlin")
+    (locale "en_US.UTF-8")
+    (bootloader (grub-configuration (device #f)))
+    (file-systems %base-file-systems)
+    (firmware '())
+    (services (cons*
+               (dhcp-client-service)
+               (service opensmtpd-service-type
+                        (opensmtpd-configuration
+                         (config-file
+                          (plain-file "smtpd.conf" "
+listen on 0.0.0.0
+accept from any for local deliver to mbox
+"))))
+               %base-services))))
+
+(define (run-opensmtpd-test)
+  "Return a test of an OS running OpenSMTPD service."
+  (mlet* %store-monad ((command (system-qemu-image/shared-store-script
+                                 (marionette-operating-system
+                                  %opensmtpd-os
+                                  #:imported-modules '((gnu services herd)))
+                                 #:graphic? #f)))
+    (define test
+      (with-imported-modules '((gnu build marionette))
+        #~(begin
+            (use-modules (rnrs base)
+                         (srfi srfi-64)
+                         (ice-9 rdelim)
+                         (ice-9 regex)
+                         (gnu build marionette))
+
+            (define marionette
+              (make-marionette
+               ;; Enable TCP forwarding of the guest's port 25.
+               '(#$command "-net" "user,hostfwd=tcp::1025-:25")))
+
+            (define (read-reply-code port)
+              "Read a SMTP reply from PORT and return its reply code."
+              (let* ((line      (read-line port))
+                     (mo        (string-match "([0-9]+)([ -]).*" line))
+                     (code      (string->number (match:substring mo 1)))
+                     (finished? (string= " " (match:substring mo 2))))
+                (if finished?
+                    code
+                    (read-reply-code port))))
+
+            (mkdir #$output)
+            (chdir #$output)
+
+            (test-begin "opensmptd")
+
+            (test-assert "service is running"
+              (marionette-eval
+               '(begin
+                  (use-modules (gnu services herd))
+                  (start-service 'smtpd)
+                  #t)
+               marionette))
+
+            (test-assert "mbox is empty"
+              (marionette-eval
+               '(and (file-exists? "/var/mail")
+                     (not (file-exists? "/var/mail/root")))
+               marionette))
+
+            (test-eq "accept an email"
+              #t
+              (let* ((smtp (socket AF_INET SOCK_STREAM 0))
+                     (addr (make-socket-address AF_INET INADDR_LOOPBACK 1025)))
+                (connect smtp addr)
+                ;; Be greeted.
+                (read-reply-code smtp)             ;220
+                ;; Greet the server.
+                (write-line "EHLO somehost" smtp)
+                (read-reply-code smtp)             ;250
+                ;; Set sender email.
+                (write-line "MAIL FROM: <someone>" smtp)
+                (read-reply-code smtp)             ;250
+                ;; Set recipient email.
+                (write-line "RCPT TO: <root>" smtp)
+                (read-reply-code smtp)             ;250
+                ;; Send message.
+                (write-line "DATA" smtp)
+                (read-reply-code smtp)             ;354
+                (write-line "Subject: Hello" smtp)
+                (newline smtp)
+                (write-line "Nice to meet you!" smtp)
+                (write-line "." smtp)
+                (read-reply-code smtp)             ;250
+                ;; Say goodbye.
+                (write-line "QUIT" smtp)
+                (read-reply-code smtp)             ;221
+                (close smtp)
+                #t))
+
+            (test-assert "mail arrived"
+              (marionette-eval
+               '(begin
+                  (use-modules (ice-9 popen)
+                               (ice-9 rdelim))
+
+                  (define (queue-empty?)
+                    (eof-object?
+                     (read-line
+                      (open-input-pipe "smtpctl show queue"))))
+
+                  (let wait ()
+                    (if (queue-empty?)
+                        (file-exists? "/var/mail/root")
+                        (begin (sleep 1) (wait)))))
+               marionette))
+
+            (test-end)
+            (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
+
+    (gexp->derivation "opensmtpd-test" test)))
+
+(define %test-opensmtpd
+  (system-test
+   (name "opensmtpd")
+   (description "Send an email to a running OpenSMTPD server.")
+   (value (run-opensmtpd-test))))
-- 
2.10.0