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Fuzzy attributes
================
.. module:: factory.fuzzy
Some tests may be interested in testing with fuzzy, random values.
This is handled by the :mod:`factory.fuzzy` module, which provides a few
random declarations.
FuzzyAttribute
--------------
.. class:: FuzzyAttribute
The :class:`FuzzyAttribute` uses an arbitrary callable as fuzzer.
It is expected that successive calls of that function return various
values.
.. attribute:: fuzzer
The callable that generates random values
FuzzyChoice
-----------
.. class:: FuzzyChoice(choices)
The :class:`FuzzyChoice` fuzzer yields random choices from the given
iterable.
.. note:: The passed in :attr:`choices` will be converted into a list at
declaration time.
.. attribute:: choices
The list of choices to select randomly
FuzzyInteger
------------
.. class:: FuzzyInteger(low[, high])
The :class:`FuzzyInteger` fuzzer generates random integers within a given
inclusive range.
The :attr:`low` bound may be omitted, in which case it defaults to 0:
.. code-block:: pycon
>>> FuzzyInteger(0, 42)
>>> fi.low, fi.high
0, 42
>>> fi = FuzzyInteger(42)
>>> fi.low, fi.high
0, 42
.. attribute:: low
int, the inclusive lower bound of generated integers
.. attribute:: high
int, the inclusive higher bound of generated integers
Custom fuzzy fields
-------------------
Alternate fuzzy fields may be defined.
They should inherit from the :class:`BaseFuzzyAttribute` class, and override its
:meth:`~BaseFuzzyAttribute.fuzz` method.
.. class:: BaseFuzzyAttribute
Base class for all fuzzy attributes.
.. method:: fuzz(self)
The method responsible for generating random values.
*Must* be overridden in subclasses.
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