Fixed packaging and using tox for testing

Using builtin mock in Python >= 3.3

MANIFEST.in

@@ -0,0 +1,2 @@
+include README.md
+include LICENSE

pytest_mock.py

@@ -1,5 +1,12 @@
+import sys
+
 import pytest
-import mock as mock_module
+
+
+if sys.version_info >= (3, 3):
+    import unittest.mock as mock_module
+else:
+    import mock as mock_module
 
 
 class MockFixture(object):

setup.py

@@ -1,14 +1,21 @@
+import sys
+
 from setuptools import setup
 
 
+dependencies = ['pytest>=2.4']
+if sys.version_info < (3, 3):
+    dependencies.append('mock')
+
 setup(
     name='pytest-mock',
     version='0.1.0',
     entry_points={
         'pytest11': ['pytest-mock = pytest_mock'],
     },
-    modules=['pytest_mock'],
-    install_requires=['pytest>=2.3.4', 'mock'],
+    py_modules=['pytest_mock'],
+    platforms='any',
+    install_requires=dependencies,
     url='https://github.com/nicoddemus/pytest-mock/',
     license='LGPL',
     author='Bruno Oliveira',

test_pytest_mock.py

@@ -58,9 +58,10 @@ def mock_using_patch(mock):
 
 
 def mock_using_patch_multiple(mock):
-    from mock import DEFAULT
+    from pytest_mock import mock_module
 
-    r = mock.patch.multiple('os', remove=DEFAULT, listdir=DEFAULT)
+    r = mock.patch.multiple('os', remove=mock_module.DEFAULT,
+                            listdir=mock_module.DEFAULT)
     return r['remove'], r['listdir']
 
 

tox.ini

@@ -0,0 +1,7 @@
+[tox]
+# note that tox expects interpreters to be found at C:\PythonXY,
+# with XY being python version ("27" or "34") for instance
+envlist = py26, py27, py32, py33, py34
+
+[testenv]
+commands = py.test test_pytest_mock.py