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whatsnew: unittest drops references to successful tests.

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R David Murray 2014-02-23 20:53:50 -05:00
parent 9e2b14ce62
commit ef3da23cb3
1 changed files with 18 additions and 0 deletions
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Doc/whatsnew/3.4.rst
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@ -1286,6 +1286,14 @@ error. (Contributed by Zach Ware in :issue:`16935`.)
consistent test ordering. (Contributed by Martin Melin and Jeff Ramnani in consistent test ordering. (Contributed by Martin Melin and Jeff Ramnani in
:issue:`16709`.) :issue:`16709`.)
:class:`~unittest.TestSuite` now drops references to tests as soon as the test
has been run, if the test is successful. On Python interpreters that do
garbage collection, this allows the tests to be garbage collected if nothing
else is holding a reference to the test. It is possible to override this
behavior by creating a :class:`~unittest.TestSuite` subclass that defines a
custom ``_removeTestAtIndex`` method. (Contributed by Tom Wardill, Matt
McClure, and Andrew Svetlov in :issue:`11798`.)
venv venv
---- ----
@ -1871,6 +1879,16 @@ Changes in the Python API
Previously some builtin hashes had uppercase names, but now that it is a Previously some builtin hashes had uppercase names, but now that it is a
formal public interface the naming has been made consistent (:issue:`18532`). formal public interface the naming has been made consistent (:issue:`18532`).
* Because :mod:`unittest.TestSuite` now drops references to tests after they
are run, test harnesses that re-use a :class:`~unittest.TestSuite` to re-run
a set of tests may fail. Test suites should not be re-used in this fashion
since it means state is retained between test runs, breaking the test
isolation that :mod:`unittest` is designed to provide. However, if the lack
of isolation is considered acceptable, the old behavior can be restored by
creating a :mod:`~unittest.TestSuite` subclass that defines a
``_removeTestAtIndex`` method that does nothing (see
:meth:`.TestSuite.__iter__`) (:issue:`11798`).
Changes in the C API Changes in the C API
-------------------- --------------------