Test configuration
========================

test options and values 
-----------------------------

You can see all available command line options by running::

    py.test -h 

py.test will lookup values of options in this order:

* option value supplied at command line 
* content of environment variable ``PYTEST_OPTION_NAME=...``
* ``name = ...`` setting in the nearest ``conftest.py`` file.

The name of an option usually is the one you find 
in the longform of the option, i.e. the name 
behind the ``--`` double-dash. 

IOW, you can set default values for options per project, per
home-directoray, per shell session or per test-run.