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=======================
Test coverage reporting
=======================
.. autoplugin :: nose2.plugins.coverage.Coverage
Differences From coverage
-------------------------
The ``coverage`` tool is the basis for nose2's coverage reporting. nose2 will
seek to emulate ``coverage`` behavior whenever possible, but there are known
cases where this is not feasible.
If you need the exact behaviors of ``coverage``, consider having ``coverage``
invoke ``nose2``.
Otherwise, please be aware of the following known differences:
- The ``fail_under`` parameter results in an exit status of 2 for ``coverage``,
but an exit status of 1 for ``nose2``
Compatibility with mp plugin
----------------------------
The ``coverage`` and ``mp`` plugins may be used in conjunction to enable
multiprocess testing with coverage reporting.
Special instructions:
- Due to the way the plugin is reloaded in subprocesses, command-line options
for the ``coverage`` plugin have no effect. If you need to change any
``coverage`` plugin options, use a configuration file.
- Do *not* use the ``concurrency`` option within a ``.coveragerc`` file ; this
interferes with the ``coverage`` plugin, which automatically handles
multiprocess coverage reporting.
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