[PATCH v2 0/2] kunit: Add support for skipping entire test suites

[Vaibhav Jain]

Changelog:
==========
Previous version:
https://lore.kernel.org/all/20260604162805.556135-1-vaibhav@xxxxxxxxxxxxx/

* Fix malformed and missing test-log when skipping kunit-suite. [David Gow]
* Update kunit_init_suite() to reset the kunit-suite so that it can be
re-run [David Gow]
* Update kunit_suite_has_succeeded() to check for any failed test-case and
update the 'status' for kunit-suite.
* Added David Gow's RB to Patch-2

Summary of changes
==================

This patch series introduces the ability to skip entire 'kunit_suite'
based on runtime conditions, addressing a limitation where test suites
could only skip individual test cases or fail when prerequisites were not
met.

The motivation for this feature comes from test suites that depend on
specific hardware features, kernel capabilities, or runtime conditions.
Currently, such suites must either:
* Fail when prerequisites are missing
* Skip each test case individually with redundant checks
* Implement workarounds to avoid running tests

An example of such a requirement came from [1] where the patch author
wanted to skip the entire 'kunit_suite' but then had to resort marking all
struct 'kunit_case' as skipped by accessing 'kunit_case.status' private
struct member. This usecase being addressed in the patch[1] can be better
implemented with the changes proposed in this patch series.

Structure of the patch series
=============================
PATCH 1:
* Add a 'status' field to struct kunit_suite that allows 'suite_init'
  callbacks to mark the entire suite as KUNIT_SKIPPED.
* Modify the KUnit core to check this newly introduced 'status' field
  and bypass all test cases when a suite is marked as skipped.
* Update debugfs_print_results() to emmit correct logs for skipped
  'kunit-suite'
* Init 'kunit_suite.status' to KUNIT_SUCCESS so that kunit_suite can be
  re-run from debugfs

Patch 2:
* Providing an example in kunit-example-test.c demonstrating the usage
  pattern.

The implementation is minimal and non-intrusive, adding only a status field
to kunit_suite and checks in two key functions. Test suites that don't use
this proposed feature should be unaffected.

References
==========
[1] https://lore.kernel.org/all/20260604092931.344101-1-vaibhav@xxxxxxxxxxxxx

Vaibhav Jain (2):
  kunit: Add ability to skip entire test suites
  kunit: Add example of test suite that can be skipped at runtime

 include/kunit/test.h           |  1 +
 lib/kunit/debugfs.c            | 30 +++++++++++++++++++++---------
 lib/kunit/kunit-example-test.c | 29 +++++++++++++++++++++++++++++
 lib/kunit/test.c               | 17 ++++++++++++++++-
 4 files changed, 67 insertions(+), 10 deletions(-)

-- 
2.54.0