add a very basic test for httplib

greentest/test__httplib.py

+import unittest
+from gevent import httplib
+
+
+class Test(unittest.TestCase):
+
+    def test(self):
+        conn = httplib.HTTPConnection('www.google.com')
+        conn.request('GET', '/')
+        conn.getresponse()
+
+
+if __name__ == "__main__":
+    unittest.main()