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d��YZdS(s�The isolation plugin resets the contents of sys.modules after running
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    def setup(module):
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        sys.modules.update(module._mods)

Isolation works only during lazy loading. In normal use, this is only
during discovery of modules within a directory, where the process of
importing, loading tests and running tests from each module is
encapsulated in a single loadTestsFromName call. This plugin
implements loadTestsFromNames to force the same lazy-loading there,
which allows isolation to work in directed mode as well as discovery,
at the cost of some efficiency: lazy-loading names forces full context
setup and teardown to run for each name, defeating the grouping that
is normally used to ensure that context setup and teardown are run the
fewest possible times for a given set of names.

.. warning ::

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