Skip live server tests on Windows (need fork)

Author: nicoddemus

tests/test_live_server.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
+import os
+
 import pytest
 try:
     from urllib2 import urlopen
@@ -9,6 +11,9 @@
 from flask import url_for
 
 
+pytestmark = pytest.mark.skipif(not hasattr(os, 'fork'), reason='needs fork')
+
+
 class TestLiveServer:
 
     def test_server_is_alive(self, live_server):