FacultyContainer
****************

Containers for faculties.

:Test-Layer: unit

Getting a faculty container
===========================

We can easily create `FacultyContainers`::

    >>> from waeup.university.facultycontainer import FacultyContainer
    >>> mycontainer = FacultyContainer()

Faculty containers provide `IFacultyContainer`:

    >>> from waeup.interfaces import IFacultyContainer
    >>> IFacultyContainer.providedBy(mycontainer)
    True

Another way to get a faculty container -- without importing the class
-- is via factories. We registered a factory for faculty containers
under the name ``waeup.facultycontainer``::

    >>> import grok
    >>> grok.testing.grok('waeup')

Now we can ask for an object by calling the appropriate factory:

    >>> from zope.component import createObject
    >>> createObject(u'waeup.FacultyContainer')
    <waeup.university.facultycontainer.FacultyContainer object at 0x...>

This way we get a thing that implements IFacultyContainer without
imports or similar.

We can be sure, that the full interface is supported by the
FacultyContainer class::

    >>> from zope.interface.verify import verifyClass
    >>> verifyClass(IFacultyContainer, FacultyContainer)
    True


Storing things in faculty containers
====================================

We can, of course, store things in a faculty container. But when we
really store an object, then it must be a faculty::

    >>> mycontainer.addFaculty(42)
    Traceback (most recent call last):
    ...
    TypeError: FacultyContainers contain only IFaculty instances

Okay, so we have to get a faculty first::

    >>> from waeup.university.faculty import Faculty
    >>> myfaculty = Faculty()

We can add this faculty to our container::

    >>> mycontainer.addFaculty(myfaculty)

We get back the key, under which the faculty was stored. It will be
some string, but there is no guarantee at all, how this key looks
like. It might be a string of integers, a name or whatever; you cannot
know before.