On Sat, 03 Aug 2013 16:47:37 -0700, Eli Bendersky <eli...@gmail.com> wrote: > On Sat, Aug 3, 2013 at 4:36 PM, 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. > > > > Thoughts? > > > > Eli > > FWIW the problem is also discussed here: > http://bugs.python.org/issue1674555, w.r.t. test_site
Can't you just launch a subprocess from the test itself using script_helpers? --David _______________________________________________ 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/archive%40mail-archive.com
