Hi Peter,
On Wed, Jul 29, 2020 at 5:39 PM peterz@infradead.org wrote:
On Wed, Jul 29, 2020 at 05:11:46PM -0300, Vitor Massaru Iha wrote:
This adds the conversion of the runtime tests of test_min_heap, from `lib/test_min_heap.c` to KUnit tests.
Please apply this commit first (linux-kselftest/kunit-fixes): 3f37d14b8a3152441f36b6bc74000996679f0998 kunit: kunit_config: Fix parsing of CONFIG options with space
Signed-off-by: Vitor Massaru Iha vitor@massaru.org
lib/Kconfig.debug | 29 ++++-- lib/Makefile | 2 +- lib/{test_min_heap.c => min_heap_kunit.c} | 117 ++++++++++++---------- 3 files changed, 83 insertions(+), 65 deletions(-) rename lib/{test_min_heap.c => min_heap_kunit.c} (60%)
So where's the win? What's KUnit, why should I care and more lines.
KUnit is a unit testing and mocking framework for the Linux kernel. [0]
In Kconfig.debug you only have some more information about KUnit.
If the number of lines is a parameter that should be considered, I can change sections like this
- if (last > values[0]) { - pr_err("error: expected %d <= %d\n", last, - values[0]); - err++; - } + KUNIT_EXPECT_FALSE_MSG(context, + last > values[0], + "expected %d <= %d\n", + last, values[0]);
To this:
- if (last > values[0]) { - pr_err("error: expected %d <= %d\n", last, - values[0]); - err++; - } + KUNIT_EXPECT_FALSE_MSG(context, last > values[0], "expected %d <= %d\n", last, values[0]);
And from this:
+static struct kunit_case __refdata min_heap_test_cases[] = { + KUNIT_CASE(test_heapify_all_true), + KUNIT_CASE(test_heapify_all_false), + KUNIT_CASE(test_heap_push_true), + KUNIT_CASE(test_heap_push_false), + KUNIT_CASE(test_heap_pop_push_true), + KUNIT_CASE(test_heap_pop_push_false), + {}
To this:
+static struct kunit_case __refdata min_heap_test_cases[] = { + KUNIT_CASE(test_min_heap), + {}
I did the latter this way to be more informative, but if the goal is to reduce lines of code, this is possible.
The results can be seen this way:
This is an excerpt from the test.log with the result in TAP format: [snip] ok 5 - example # Subtest: min-heap 1..6 ok 1 - test_heapify_all_true ok 2 - test_heapify_all_false ok 3 - test_heap_push_true ok 4 - test_heap_push_false ok 5 - test_heap_pop_push_true ok 6 - test_heap_pop_push_false [snip]
And this from kunit-tool: [snip] [18:43:32] ============================================================ [18:43:32] ======== [PASSED] min-heap ======== [18:43:32] [PASSED] test_heapify_all_true [18:43:32] [PASSED] test_heapify_all_false [18:43:32] [PASSED] test_heap_push_true [18:43:32] [PASSED] test_heap_push_false [18:43:32] [PASSED] test_heap_pop_push_true [18:43:32] [PASSED] test_heap_pop_push_false [18:43:32] ============================================================ [18:43:32] Testing complete. 20 tests run. 0 failed. 0 crashed. [18:43:32] Elapsed time: 9.758s total, 0.001s configuring, 6.012s building, 0.000s running [snip]
BR, Vitor
[0] https://www.kernel.org/doc/html/latest/dev-tools/kunit/index.html#what-is-ku...