[TIP] paramterized or generative tests [was nose2: the nosening]
Victoria G. Laidler
laidler at stsci.edu
Thu Aug 5 19:54:25 PDT 2010
> On Thu, Aug 5, 2010 at 9:31 PM, Michael
> Foord<fuzzyman at voidspace.org.uk> wrote:
>
>
> On 06/08/2010 02:23, Jesse Noller wrote:
>
>
> [snip...]
> ps: If nose2/unittest2 could find it in it's shiny
> new innocent heart
> to say, have support for test generators; I'd die
> happy.
>
>
>
> Well there's another discussion :-)
>
> It would be very simple to support parameterized tests
> (of some form), where
> the number of tests can be known at test load time.
> Supporting generative
> tests - where the tests are generated at *test run
> time* is uglier.
>
> Would parameterized tests, where the tests are all
> generated at test load
> time, suffice or do you have a use case for generative
> tests where the tests
> have to be generated whilst the tests are running and
> not when the tests are
> loaded?
>
> Michael
Hi Michael & all,
I desperately need a clean way to run generated tests that a) get names I can control and b) attributes that can be defined and modified in the test itself that are then attached to the test case so I can access them via my report generator plugin.
I tried to do this with nose and it has really not worked out well - we are still using it in some places but just gave up and wrote a couple of simpler Pandokia-compliant test runners. I'd rather use a community standard so if we could get this into nose2 that would be great.
My immediate use case is as follows:
- I have a directory full of datafiles that define the inputs and expected outputs for the code under test
- The test itself should be python code that can:
- import bits of test code (not just code under test) from elsewhere, including the code that does the following:
- dynamically generate the tests based on the files that are present in the directory
- name each test based on those filenames
- invoke and execute the code under test
- perform comparisons and save data about the comparisons in dictionaries attached to the test function
Vicki
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