Re: [PATCH v8 kunit-next 0/4] kunit: add debugfs representation to show results

[shuah]

On 3/26/20 8:25 AM, Alan Maguire wrote:
> When kunit tests are run on native (i.e. non-UML) environments, the results
> of test execution are often intermixed with dmesg output.  This patch
> series attempts to solve this by providing a debugfs representation
> of the results of the last test run, available as
>
> /sys/kernel/debug/kunit/<testsuite>/results
>
> Changes since v7:
>
> - renamed KUNIT_INDENT[2] to KUNIT_SUBTEST_INDENT, KUNIT_SUBSUBTEST_INDENT
>    and added more description to their definitions to clarify why they
>    are defined as they are (Shuah)
> - defined KUNIT_SUBSUBTEST_INDENT directly as 8 spaces to avoid
>    checkpatch error (Shuah)
>
> Changes since v6:
>
> - fixed regexp parsing in kunit_parser.py to ensure test results are read
>    successfully with 4-space indentation (Brendan, patch 3)
>
> Changes since v5:
>
> - replaced undefined behaviour use of snprintf(buf, ..., buf) in
>    kunit_log() with a function to append string to existing log
>    (Frank, patch 1)
> - added clarification on log size limitations to documentation
>    (Frank, patch 4)
>
> Changes since v4:
>
> - added suite-level log expectations to kunit log test (Brendan, patch 2)
> - added log expectations (of it being NULL) for case where
>    CONFIG_KUNIT_DEBUGFS=n to kunit log test (patch 2)
> - added patch 3 which replaces subtest tab indentation with 4 space
>    indentation as per TAP 14 spec (Frank, patch 3)
>
> Changes since v3:
>
> - added CONFIG_KUNIT_DEBUGFS to support conditional compilation of debugfs
>    representation, including string logging (Frank, patch 1)
> - removed unneeded NULL check for test_case in
>    kunit_suite_for_each_test_case() (Frank, patch 1)
> - added kunit log test to verify logging multiple strings works
>    (Frank, patch 2)
> - rephrased description of results file (Frank, patch 3)
>
> Changes since v2:
>
> - updated kunit_status2str() to kunit_status_to_string() and made it
>    static inline in include/kunit/test.h (Brendan)
> - added log string to struct kunit_suite and kunit_case, with log
>    pointer in struct kunit pointing at the case log.  This allows us
>    to collect kunit_[err|info|warning]() messages at the same time
>    as we printk() them.  This solves for the most part the sharing
>    of log messages between test execution and debugfs since we
>    just print the suite log (which contains the test suite preamble)
>    and the individual test logs.  The only exception is the suite-level
>    status, which we cannot store in the suite log as it would mean
>    we'd print the suite and its status prior to the suite's results.
>    (Brendan, patch 1)
> - dropped debugfs-based kunit run patch for now so as not to cause
>    problems with tests currently under development (Brendan)
> - fixed doc issues with code block (Brendan, patch 3)
>
> Changes since v1:
>   - trimmed unneeded include files in lib/kunit/debugfs.c (Greg)
>   - renamed global debugfs functions to be prefixed with kunit_ (Greg)
>   - removed error checking for debugfs operations (Greg)
>
> Alan Maguire (4):
>    kunit: add debugfs /sys/kernel/debug/kunit/<suite>/results display
>    kunit: add log test
>    kunit: subtests should be indented 4 spaces according to TAP
>    kunit: update documentation to describe debugfs representation
>
>   Documentation/dev-tools/kunit/usage.rst |  14 +++
>   include/kunit/test.h                    |  63 ++++++++++++--
>   lib/kunit/Kconfig                       |   8 ++
>   lib/kunit/Makefile                      |   4 +
>   lib/kunit/assert.c                      |  79 ++++++++---------
>   lib/kunit/debugfs.c                     | 116 +++++++++++++++++++++++++
>   lib/kunit/debugfs.h                     |  30 +++++++
>   lib/kunit/kunit-test.c                  |  44 +++++++++-
>   lib/kunit/test.c                        | 148 +++++++++++++++++++++++++-------
>   tools/testing/kunit/kunit_parser.py     |  10 +--
>   10 files changed, 430 insertions(+), 86 deletions(-)
>   create mode 100644 lib/kunit/debugfs.c
>   create mode 100644 lib/kunit/debugfs.h

Thanks. Applied to linux-kselftest kunit for 5.7-rc1.

thanks,
-- Shuah