Adding a dependency on "mock" for Python 2

Author: mwatts15

setup.py

@@ -1,6 +1,9 @@
 #!/usr/bin/env python
+import sys
+
 from setuptools import setup
 
+PY2 = sys.version_info.major == 2
 
 project = "rdflib-sqlalchemy"
 version = "0.3.8"
@@ -53,7 +56,9 @@
     setup_requires=[
         "nose>=1.3.6",
     ],
-    tests_require="coveralls",
+    tests_require=[
+        "coveralls"
+    ] + (['mock'] if PY2 else []),
     test_suite="nose.collector",
     entry_points={
         'rdf.plugins.store': [

test/test_sqlalchemy.py

@@ -1,5 +1,9 @@
 import unittest
-from unittest.mock import patch
+
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
 
 from rdflib import (
     ConjunctiveGraph,
@@ -40,7 +44,7 @@ def test_success(self):
             p.create_engine.assert_called_with('sqlite://', random_key='something')
 
     def test_no_url(self):
-        with patch('rdflib_sqlalchemy.store.sqlalchemy') as p:
+        with patch('rdflib_sqlalchemy.store.sqlalchemy'):
             with self.assertRaisesRegex(Exception, '.*url.*'):
                 self.graph.open({'random_key': 'something'}, create=True)