[issue7443] test.support.unlink issue on Windows platform

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> I did start to undertake a conversion of TESTFN to a named temporary,
> but it started to sprawl all over the place and came up against a
> number of corner cases (eg where tests deliberately wanted two
> filenames to be the same) so I gave up.

How about renaming to a unique random name just before the unlink(), as
Mercurial does?
Would it alleviate the problem or am I missing something?

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<http://bugs.python.org/issue7443>
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