[Python-ideas] ABC: what about the method arguments ? (original) (raw)

Daniel Stutzbach daniel at stutzbachenterprises.com
Fri Sep 24 16:17:19 CEST 2010

On Thu, Sep 23, 2010 at 7:24 PM, Terry Reedy <tjreedy at udel.edu> wrote:

Can this work? Split the current test suite for a concrete class that implements one of the ABCs into concrete-specific and ABC-general portions, with the abstract part parameterized by concrete class.

For instance, split test/testdict.py into testdict.py and testMapping.py, where the latter has all tests that test compliance with the Mapping ABC (or whatever it is called) and the former keeps all the dict-specific extension tests. Rewrite testMapping so it is not dict specific, so one could write something like

As a heavy user of the ABCs in the collections module, that would be awesome. :-) It would make my life a lot easier when I'm writing tests to go along with an ABC-derived class. I have 8 such classes on PyPi (heapdict.heapdict and blist.*), plus more in private repositories.

There is some code vaguely along those lines in the existing unit tests. For example, Lib/test/seq_tests.py contains tests common to sequences. However, that was written before collections.Sequence came along and the pre-2.6 definition of "sequence" only loosely correlates with a collections.Sequence.

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