Use tox to easily run tests in venv

tox https://pypi.python.org/pypi/tox is a thin wrapper around virtualenv
which let you craft a fresh python environement to execute command in.

It creates the env with virtualenv, install dependencies, run python
setup.py install in it and then execute whatever command you want it to
do and report status.

To do so I simply:

- listed tests dependencies in test-requirements.txt (which are just
  nose and mock)
- provide a tox.ini file which describe how to install the dependencies
  and execute nosetests
- added the module 'coverage' to the list of test dependencies

To run tests simply:

 pip install tox && tox

That will execute the test command 'nosetests' using python2.6 and then
python 2.7.

The additional env 'cover' can be run using: tox -ecover.

1 files changed, 4 insertions, 0 deletions

diff --git a/test-requirements.txt b/test-requirements.txt
new file mode 100644
index 00000000..6da60814
--- /dev/null
+++ b/test-requirements.txt
@@ -0,0 +1,4 @@
+# Remember to update README.md
+coverage
+nose
+mock