adding test around create youtube object from a url. Added a test file for testing on python3

tests/test_p3_pytube.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+import warnings
+import mock
+from nose.tools import eq_, raises
+from pytube import api
+from pytube.exceptions import MultipleObjectsReturned, AgeRestricted, \
+    DoesNotExist, PytubeError
+
+
+class TestPytube(object):
+    def setUp(self):
+        self.url = 'http://www.youtube.com/watch?v=9bZkp7q19f0'
+
+    def test_YT_create_from_url(self):
+        'test creation of YouYube Object from url'
+        yt = api.YouTube(self.url)

tests/test_pytube.py

@@ -132,3 +132,9 @@ class TestPytube(object):
     def test_get_json_offset_with_bad_html(self):
         """Raise exception if json offset cannot be found"""
         self.yt._get_json_offset('asdfasdf')
+
+    def test_YT_create_from_url(self):
+        'test creation of YouYube Object from url'
+        url = 'http://www.youtube.com/watch?v=9bZkp7q19f0'
+
+        yt = api.YouTube(url)