sporadic test failure on hashcache length tests

[John A Meinel]

Robert Collins wrote:
> Sometimes (unreproducible :[) I get a test failure in testhashcache.py
> line 98.
>
> Cheers,
> Rob

Looking at the code, I would guess time.time() is returning a floating
point value, so you are only waiting 0.5 seconds, versus waiting 1 full
second so that the hashcache will do its job. (I believe the code
explicitly requires that 1s has passed from the stat before the contents
will be cached.)

Attached is a simple fix for this, which I think would solve the problem.

It probably will make the test suite take longer, but that should be
okay, as long as it gives the right answer *always*.

John
=:->

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