Add documentation about testing boolean.py with tox

Signed-off-by: Aleksandr Lisianoi <[email protected]>

Author: Alexander Lisianoi

README.md

@@ -38,13 +38,30 @@ Documentation
 
 http://readthedocs.org/docs/booleanpy/en/latest/
 
+Installation
+------------
 
+`pip install boolean.py`
 
-Download and installation
--------------------------
+Testing
+-------
+
+Test `boolean.py` with your current Python environment:
+
+`python setup.py test`
 
-    `pip install boolean.py`
+Test with all of the supported Python environments using `tox`:
 
+```
+pip install -r test-requirements.txt
+tox
+```
+
+If `tox` throws `InterpreterNotFound`, limit it to python interpreters that are actually installed on your machine:
+
+```
+tox -e py27,py36
+```
 
 License
 -------

docs/development_guide.rst

@@ -10,6 +10,28 @@ and laws are stated in :doc:`concepts`.
     :depth: 2
     :backlinks: top
 
+Testing
+-------
+
+Test `boolean.py` with your current Python environment:
+
+.. code-block:: shell
+
+   python setup.py test
+
+Test with all of the supported Python environments using `tox`:
+
+.. code-block:: shell
+
+   pip install -r test-requirements.txt
+   tox
+
+If `tox` throws `InterpreterNotFound`, limit it to python interpreters that are actually installed on your machine:
+
+.. code-block:: shell
+
+   tox -e py27,py36
+
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