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Thu Apr 7 21:18:07 CEST 2011 · https://mail.python.org/pipermail/python-dev/2011-April/110548.html

On Fri, Apr 8, 2011 at 4:49 AM, Michael Foord <fuzzyman at voidspace.org.uk> wrote:
> You mean that the test run keeps the test instances alive for the whole test
> run so instance attributes are also kept alive. How would you solve this -
> by having calling a TestSuite (which is how a test run is executed) remove
> members from themselves after each test execution? (Any failure tracebacks
> etc stored by the TestResult would also have to not keep the test alive.)
>
> My only concern would be backwards compatibility due to the change in
> behaviour.

An alternative is in TestCase.run() / TestCase.__call__(), make a copy
and immediately delegate to it; that leaves the original untouched,
permitting run-in-a-loop style helpers to still work.

Testtools did something to address this problem, but I forget what it
was offhand.

-Rob

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[Python-Dev] Test cases not garbage collected after run