[TIP] unittest2/nose2: plugin interaction or overrides or ... ?

Michael Foord fuzzyman at voidspace.org.uk
Thu Sep 2 10:29:14 PDT 2010


  On 31/08/2010 14:48, jason pellerin wrote:
> [snip...]
>> Let me know if I can change anything in moduleloading (I don't like the name
>> and may change it - suggestions welcomed) to make it more reusable.
> A couple of things would help:
>
> - break out the check for generatorness and the extraction of setup
> and teardown attributes into methods I can override. (eg isGenerator =
> self.isGenerator(obj) instead of isGenerator = getattr(obj,
> 'testGenerator', False)

Done. Both the Functions and the Generators plugins have isGenerator 
methods.

> - in testsFromGenerator, either make testsFromGeneator a method itself
> and have it call an overridable method instead of enumerate() for
> iterating the generator, or allow testsFromGenerator to take a
> callback that is called instead of enumerate.
>
> The reason for the latter change is that nose expects generator tests'
> yields to look like this:
>
> yield callable_or_name, arg, arg, arg
>
> and I'd like to support that as well as unittest2's:
>
> yield callable, (arg, arg, arg)
>
> to do that cleanly, this line:
>
> for index, (func, args) in enumerate(generator):
>
> needs to change (or nose needs to wrap each generator func it sees in
> another generator that munges the output, but I think that would mess
> up user's tracebacks so I'd rather avoid it if possible).
>

The testsFromGenerator function takes an unpack argument. Both Functions 
and Generators have an unpack class attribute 'unpack' that is passed 
in. You can override this in a subclass.

Let me know if you need any further changes or I screwed something up.

All the best,

Michael Foord


> Thanks,
>
> JP


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