Hi Meme,
On Thu, Jul 29, 2010 at 18:33 +1000, meme dough wrote:
> Hi,
>
> I was wondering about the pytest_generate_tests which can make many
> parameterise test from 1 test function.
>
> When I have many tests and I want to parameterise a number of them the
> pytest_generate_tests function has to have a if metafunc.function ==
> xxx elif metafunc.function == yyy etc.
>
> This means a big switch statement on which function it is. It also
> means that parameterised data for a function may be a long way from
> it. This can happen easy when have a test module per source module.
>
> Are there any ideas maybe for a pytest_generate_tests for each
> function that needs to be parameterised? Maybe like
> pytest_generate_tests__myfunc(metafunc) which can create many tests
> for the test_myfunc ?
>
> Just curious if this would be a good idea or not.
>
> :)
The parametrized testing mechanism is quite low level. As exemplified in
http://tetamap.wordpress.com/2009/05/13/
there are various ways to build higher-level parametrized testing.
You can e.g. write a generic pytest_generate_tests that
invokes a decorator of a test function (or some attribute on its test
class) thus allowing very specified and close-to-the-test parametrization.
Note: currently pytest_generate_tests cannot easily be combined,
i.e. if you have
test_func(arg1, arg2)
you cannot have two independent pytest_generate_tests method which
generate values for each of the args. See also the ISSUES.txt
in the repo where there are some notes about parametrized testing.
best,
holger
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