add user password test

tests/userPassword.nix

@@ -0,0 +1,53 @@
+#  nixos-mailserver: a simple mail server
+#  Copyright (C) 2016-2017  Robin Raymond
+#
+#  This program 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.
+#
+#  This program 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 this program. If not, see <http://www.gnu.org/licenses/>
+
+import ./../../nixpkgs/nixos/tests/make-test.nix {
+
+  machine =
+    { config, pkgs, ... }:
+    {
+        imports = [
+            ./../default.nix
+        ];
+
+        mailserver = {
+          enable = true;
+          domain = "example.com";
+
+          hostPrefix = "mail";
+          loginAccounts = {
+              user1 = {
+                  hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
+              };
+          };
+        };
+    };
+
+  testScript =
+    ''
+      $machine->start;
+      $machine->waitForUnit("multi-user.target");
+
+      subtest "user exists", sub {
+            $machine->succeed("cat /etc/shadow | grep 'user1\@example.com'");
+      };
+
+      subtest "password is set", sub {
+            $machine->succeed("cat /etc/shadow | grep 'user1\@example.com:\$6\$/z4n8AQl6K\$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/:1::::::'");
+      };
+
+    '';
+}