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Documentation: KUnit: Update filename best practices

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Based on feedback from Linus[1] and follow-up discussions, change the
suggested file naming for KUnit tests.

Link: https://lore.kernel.org/lkml/CAHk-=wgim6pNiGTBMhP8Kd3tsB7_JTAuvNJ=XYd3wPvvk=OHog@mail.gmail.com/ [1]
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Kees Cook <kees@kernel.org>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Kees Cook 2024-07-24 13:13:57 -07:00 committed by Shuah Khan
parent 8400291e28
commit 1757cc292a
1 changed files with 20 additions and 9 deletions
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29
Documentation/dev-tools/kunit/style.rst
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@ -188,15 +188,26 @@ For example, a Kconfig entry might look like:
Test File and Module Names
==========================
KUnit tests can often be compiled as a module. These modules should be named
after the test suite, followed by ``_test``. If this is likely to conflict with
non-KUnit tests, the suffix ``_kunit`` can also be used.
KUnit tests are often compiled as a separate module. To avoid conflicting
with regular modules, KUnit modules should be named after the test suite,
followed by ``_kunit`` (e.g. if "foobar" is the core module, then
"foobar_kunit" is the KUnit test module).
The easiest way of achieving this is to name the file containing the test suite
``<suite>_test.c`` (or, as above, ``<suite>_kunit.c``). This file should be
placed next to the code under test.
Test source files, whether compiled as a separate module or an
``#include`` in another source file, are best kept in a ``tests/``
subdirectory to not conflict with other source files (e.g. for
tab-completion).
Note that the ``_test`` suffix has also been used in some existing
tests. The ``_kunit`` suffix is preferred, as it makes the distinction
between KUnit and non-KUnit tests clearer.
So for the common case, name the file containing the test suite
``tests/<suite>_kunit.c``. The ``tests`` directory should be placed at
the same level as the code under test. For example, tests for
``lib/string.c`` live in ``lib/tests/string_kunit.c``.
If the suite name contains some or all of the name of the test's parent
directory, it may make sense to modify the source filename to reduce redundancy.
For example, a ``foo_firmware`` suite could be in the ``foo/firmware_test.c``
file.
directory, it may make sense to modify the source filename to reduce
redundancy. For example, a ``foo_firmware`` suite could be in the
``foo/tests/firmware_kunit.c`` file.