On 4 Aug 2013 09:43, "Eli Bendersky" <eli...@gmail.com> wrote: > > Hi All, > > Today the issue of cross-test global env dependencies showed its ugly > head again for me. I recall a previous discussion > (http://mail.python.org/pipermail/python-dev/2013-January/123409.html) > but there were many more over the years. > > The core problem is that some tests modify the global env > (particularly importing modules) and this sometimes has adverse > effects on other tests, because test.regrtest runs all tests in a > single process. In the discussion linked above, the particular culprit > test__all__ was judged as a candidate to be moved to a subprocess. > > I want to propose adding a capability to our test harness to run > specific tests in subprocesses. Each test will have some simple way of > asking to be run in a subprocess, and regrtest will concur (even when > running -j1). test__all__ can go there, and it can help solve other > problems. > > My particular case is trying to write a test for > http://bugs.python.org/issue14988 - wherein I have to simulate a > situation of non-existent pyexpat. It's not hard to write a test for > it, but when run in tandem with other tests (where C extensions loaded > pyexpat) it becomes seemingly impossible to set up. This should not be > the case - there's nothing wrong with wanting to simulate this case, > and there's nothing wrong in Python and the stdlib - it's purely an > artifact of the way our regression suite works.
I'm not actively opposed to the suggested idea, but is there a specific reason "test.support.import_fresh_module" doesn't work for this test? Cheers, Nick. > > Thoughts? > > Eli > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: http://mail.python.org/mailman/options/python-dev/ncoghlan%40gmail.com
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