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.. SPDX-License-Identifier: GPL-2.0
============================
Run Tests without kunit_tool
============================
If we do not want to use kunit_tool (For example: we want to integrate
with other systems, or run tests on real hardware), we can
include KUnit in any kernel, read out results, and parse manually.
.. note:: KUnit is not designed for use in a production system. It is
possible that tests may reduce the stability or security of
the system.
Configure the Kernel
====================
KUnit tests can run without kunit_tool. This can be useful, if:
- We have an existing kernel configuration to test.
- Need to run on real hardware (or using an emulator/VM kunit_tool
does not support).
- Wish to integrate with some existing testing systems.
KUnit is configured with the ``CONFIG_KUNIT`` option, and individual
tests can also be built by enabling their config options in our
``.config``. KUnit tests usually (but don't always) have config options
ending in ``_KUNIT_TEST``. Most tests can either be built as a module,
or be built into the kernel.
.. note ::
We can enable the ``KUNIT_ALL_TESTS`` config option to
automatically enable all tests with satisfied dependencies. This is
a good way of quickly testing everything applicable to the current
config.
Once we have built our kernel (and/or modules), it is simple to run
the tests. If the tests are built-in, they will run automatically on the
kernel boot. The results will be written to the kernel log (``dmesg``)
in TAP format.
If the tests are built as modules, they will run when the module is
loaded.
.. code-block :: bash
# modprobe example-test
The results will appear in TAP format in ``dmesg``.
.. note ::
If ``CONFIG_KUNIT_DEBUGFS`` is enabled, KUnit test results will
be accessible from the ``debugfs`` filesystem (if mounted).
They will be in ``/sys/kernel/debug/kunit/<test_suite>/results``, in
TAP format.
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