palemoon-dev/platform/python/pytest

.. image:: http://pytest.org/latest/_static/pytest1.png
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:alt: pytest

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The ``pytest`` framework makes it easy to write small tests, yet
scales to support complex functional testing for applications and libraries.

An example of a simple test:

.. code-block:: python

# content of test_sample.py
def func(x):
return x + 1

def test_answer():
assert func(3) == 5


To execute it::

$ py.test
======= test session starts ========
platform linux -- Python 3.4.3, pytest-2.8.5, py-1.4.31, pluggy-0.3.1
collected 1 items

test_sample.py F

======= FAILURES ========
_______ test_answer ________

def test_answer():
> assert func(3) == 5
E assert 4 == 5
E + where 4 = func(3)

test_sample.py:5: AssertionError
======= 1 failed in 0.12 seconds ========

Due to ``py.test``'s detailed assertion introspection, only plain ``assert`` statements are used. See `getting-started `_ for more examples.


Features
--------

- Detailed info on failing `assert statements `_ (no need to remember ``self.assert*`` names);

- `Auto-discovery
`_
of test modules and functions;

- `Modular fixtures `_ for
managing small or parametrized long-lived test resources;

- Can run `unittest `_ (or trial),
`nose `_ test suites out of the box;

- Python2.6+, Python3.2+, PyPy-2.3, Jython-2.5 (untested);

- Rich plugin architecture, with over 150+ `external plugins `_ and thriving community;


Documentation
-------------

For full documentation, including installation, tutorials and PDF documents, please see http://pytest.org.


Bugs/Requests
-------------

Please use the `GitHub issue tracker `_ to submit bugs or request features.


Changelog
---------

Consult the `Changelog `_ page for fixes and enhancements of each version.


License
-------

Copyright Holger Krekel and others, 2004-2016.

Distributed under the terms of the `MIT`_ license, pytest is free and open source software.

.. _`MIT`: https://github.com/pytest-dev/pytest/blob/master/LICENSE