Changed some tests exit codes (refs #20453).

tests/test_nginx_conf_valid.sh

@@ -3,5 +3,7 @@
 set -e
 
 if ( which nginx >/dev/null ); then
-    nginx -t
+	nginx -t
+else
+	exit 2
 fi

tests/test_nginx_status.py

@@ -10,6 +10,7 @@ import sys
 
 if not os.path.exists('/etc/nginx'):
     print('Nginx dir does not exists, test skipped.')
+    sys.exit(2)
 else:
     print('Checking http://127.0.0.1:1080/nginx_status response.')
     try:

tests/test_nginx_vhosts.py

@@ -20,7 +20,7 @@ This script checks for all enabled vhosts in Nginx conf that:
 nginx_dir = '/etc/nginx/sites-enabled'
 if not os.path.exists(nginx_dir):
     print('Nginx dir does not exists ("%s").' % nginx_dir)
-    sys.exit(0)
+    sys.exit(2)
 
 # check that Wowza is installed
 wowza_dir = '/usr/local/WowzaStreamingEngine'

tests/test_ntp.py

@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 # Copyright 2017, Florent Thiery
 '''
-Check that the server is synchronized with the configured NTP server.
+Checks that the server is synchronized with the configured NTP server.
 '''
 import os
 import sys

tests/test_postfix.py

@@ -9,7 +9,7 @@ import sys
 
 
 if not os.path.exists('/etc/postfix'):
-    print('Postfix dir does not exists, test skipped.')
+    print('Postfix dir does not exists, please install postfix.')
     sys.exit(1)
 else:
     # check that postfix listens the port 25 correctly