[devtools] Re-implement generative tests using subtests
Generative tests as implemented in logilab.common.testib are not compatible
with tests runner other than lgc.pytest and this implementation differs from
the standard library, which has support for subtests_ since Python 3.4. Use
unittest2 to bridge the gap.
Maybe it'd be good to implement this on logilab.common.testlib side at some
point. Let's see how this gets received here first.
.. _subtests: https://docs.python.org/3/library/unittest.html#subtests
The facets system
-----------------
Facets allow to restrict searches according to some user friendly criterias.
CubicWeb has a builtin `facet`_ system to define restrictions `filters`_ really
as easily as possible.
Here is an exemple of the facets rendering picked from our
http://www.cubicweb.org web site:
.. image:: ../../images/facet_overview.png
Facets will appear on each page presenting more than one entity that may be
filtered according to some known criteria.
Base classes for facets
~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: cubicweb.web.facet
.. _facet: http://en.wikipedia.org/wiki/Faceted_browser
.. _filters: http://www.cubicweb.org/blogentry/154152