[issue8273] move test_support into the unittest package

[Tim Golden]

Tim Golden <mail at timgolden.me.uk> added the comment:

On 31/03/2010 14:20, Michael Foord wrote:

> - TESTFN
>
> This is a global for setting the directory temporary files are created in? Don't think I like the global approach. Which functions is it used by?

It's used *all over the place*. I started trying to rip it out
ages ago but it call got far too intrusive and I just backed
away. ISTR that more recent tests have used NamedTemporaryFile
or something similar, which makes much more sense.

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nosy: +tim.golden

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<http://bugs.python.org/issue8273>
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