Hello all,

I'm a first time user of py.tests.

My setup is:
* py.test v0.9.0
* Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win32
* Microsoft Windows XP Pro (service pack 2)

The attached file (py-test-generator-trial.py) demonstrates a behavior I do not understand.

When test_filters() is implemented as a generator, the tests appear to be run twice and all tests fail during the second iteration except for the final case ('AL12_1','Gray') in the loop.

When the yield statement, in test_filters(), is disabled and the assertion statement is enabled, the behavior is as expected -- namely the tests are performed once and all pass.

Could someone help me to understand this behavior?

Thanks,
--jv

P.S.
I could provide captured output if that is helpful.

Attachment: py-test-generator-trial.py
Description: application/python

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