Added support for tox testing

dav_base/tests/utils.py

@@ -1,12 +1,13 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 import os
-from tempfile import mkdtemp as _mkdtmp
+from tempfile import mkdtemp as _mkdtemp
 
 
 def mkdtemp(prefix):
     dirname = os.path.dirname
     pkg_base_dir = dirname(dirname(dirname(__file__)))
     tmp_dir = os.path.join(pkg_base_dir, 'tmp')
-    os.makedirs(tmp_dir, exist_ok=True)
-    return _mkdtmp(prefix=prefix, dir=tmp_dir)
+    if not os.path.exists(tmp_dir):
+        os.makedirs(tmp_dir)
+    return _mkdtemp(prefix=prefix, dir=tmp_dir)