Tests: added tests for setting user and group.

test/python/user_group/wsgi.py

@@ -0,0 +1,18 @@
+import json
+import os
+
+def application(environ, start_response):
+    uid = os.geteuid()
+    gid = os.getegid()
+
+    out = json.dumps({
+        'UID': uid,
+        'GID': gid,
+    }).encode('utf-8')
+
+    start_response('200 OK', [
+        ('Content-Length', str(len(out))),
+        ('Content-Type', 'application/json')
+    ])
+
+    return [out]