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Message-ID: <CAP-5=fWCMPyBYqn4p+_=Ra5_sXqUbr4h_OCuYS4iY-6fsnevvA@mail.gmail.com>
Date: Wed, 29 Jul 2020 15:56:55 -0700
From: Ian Rogers <irogers@...gle.com>
To: Vitor Massaru Iha <vitor@...saru.org>
Cc: kunit-dev@...glegroups.com, linux-kselftest@...r.kernel.org,
LKML <linux-kernel@...r.kernel.org>, brendanhiggins@...gle.com,
Shuah Khan <skhan@...uxfoundation.org>,
linux-kernel-mentees@...ts.linuxfoundation.org,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] lib: kunit: add test_min_heap test conversion to KUnit
On Wed, Jul 29, 2020 at 1:11 PM Vitor Massaru Iha <vitor@...saru.org> 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
Thanks for this, I'm a fan of testing frameworks :-)
> Signed-off-by: Vitor Massaru Iha <vitor@...saru.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%)
>
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 9ad9210d70a1..46674fc4972c 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1864,16 +1864,6 @@ config TEST_LIST_SORT
>
> If unsure, say N.
>
> -config TEST_MIN_HEAP
> - tristate "Min heap test"
> - depends on DEBUG_KERNEL || m
> - help
> - Enable this to turn on min heap function tests. This test is
> - executed only once during system boot (so affects only boot time),
> - or at module load time.
> -
> - If unsure, say N.
> -
> config TEST_SORT
> tristate "Array-based sort test"
> depends on DEBUG_KERNEL || m
> @@ -2185,6 +2175,25 @@ config LINEAR_RANGES_TEST
>
> If unsure, say N.
>
> +config MIN_HEAP_KUNIT
> + tristate "KUnit test for Min heap"
> + depends on KUNIT
> + depends on DEBUG_KERNEL || m
> + help
> + Enable this to turn on min heap function tests. This test is
> + executed only once during system boot (so affects only boot time),
> + or at module load time.
> +
> + KUnit tests run during boot and output the results to the debug log
> + in TAP format (http://testanything.org/). Only useful for kernel devs
> + running the KUnit test harness, and not intended for inclusion into a
> + production build.
> +
> + For more information on KUnit and unit tests in general please refer
> + to the KUnit documentation in Documentation/dev-tools/kunit/.
> +
> + If unsure, say N.
> +
It's a shame we need a config option for this. Could we have one
option to cover all basic library tests?
> config TEST_UDELAY
> tristate "udelay test driver"
> help
> diff --git a/lib/Makefile b/lib/Makefile
> index b1c42c10073b..748f57063160 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -72,7 +72,6 @@ CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla)
> UBSAN_SANITIZE_test_ubsan.o := y
> obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
> obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o
> -obj-$(CONFIG_TEST_MIN_HEAP) += test_min_heap.o
> obj-$(CONFIG_TEST_LKM) += test_module.o
> obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o
> obj-$(CONFIG_TEST_OVERFLOW) += test_overflow.o
> @@ -318,3 +317,4 @@ obj-$(CONFIG_OBJAGG) += objagg.o
> # KUnit tests
> obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
> obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
> +obj-$(CONFIG_MIN_HEAP_KUNIT) += min_heap_kunit.o
> diff --git a/lib/test_min_heap.c b/lib/min_heap_kunit.c
> similarity index 60%
> rename from lib/test_min_heap.c
> rename to lib/min_heap_kunit.c
> index d19c8080fd4d..398db1c63146 100644
> --- a/lib/test_min_heap.c
> +++ b/lib/min_heap_kunit.c
> @@ -7,9 +7,8 @@
>
> #include <linux/log2.h>
> #include <linux/min_heap.h>
> -#include <linux/module.h>
> -#include <linux/printk.h>
> #include <linux/random.h>
> +#include <kunit/test.h>
>
> static __init bool less_than(const void *lhs, const void *rhs)
> {
> @@ -29,37 +28,34 @@ static __init void swap_ints(void *lhs, void *rhs)
> *(int *)rhs = temp;
> }
>
> -static __init int pop_verify_heap(bool min_heap,
> +static __init void pop_verify_heap(struct kunit *context,
> + bool min_heap,
> struct min_heap *heap,
> const struct min_heap_callbacks *funcs)
> {
> int *values = heap->data;
> - int err = 0;
> int last;
>
> last = values[0];
> min_heap_pop(heap, funcs);
> while (heap->nr > 0) {
> if (min_heap) {
> - 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]);
I'm not familiar with kunit, is there a reason not to prefer:
KUNIT_EXPECT_LT(context, last, values[0]);
> } else {
> - 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]);
Similarly KUNIT_EXPECT_GT.
Thanks,
Ian
> }
> last = values[0];
> min_heap_pop(heap, funcs);
> }
> - return err;
> }
>
> -static __init int test_heapify_all(bool min_heap)
> +static __init void test_heapify_all(struct kunit *context, bool min_heap)
> {
> int values[] = { 3, 1, 2, 4, 0x8000000, 0x7FFFFFF, 0,
> -3, -1, -2, -4, 0x8000000, 0x7FFFFFF };
> @@ -73,12 +69,11 @@ static __init int test_heapify_all(bool min_heap)
> .less = min_heap ? less_than : greater_than,
> .swp = swap_ints,
> };
> - int i, err;
> + int i;
>
> /* Test with known set of values. */
> min_heapify_all(&heap, &funcs);
> - err = pop_verify_heap(min_heap, &heap, &funcs);
> -
> + pop_verify_heap(context, min_heap, &heap, &funcs);
>
> /* Test with randomly generated values. */
> heap.nr = ARRAY_SIZE(values);
> @@ -86,12 +81,10 @@ static __init int test_heapify_all(bool min_heap)
> values[i] = get_random_int();
>
> min_heapify_all(&heap, &funcs);
> - err += pop_verify_heap(min_heap, &heap, &funcs);
> -
> - return err;
> + pop_verify_heap(context, min_heap, &heap, &funcs);
> }
>
> -static __init int test_heap_push(bool min_heap)
> +static __init void test_heap_push(struct kunit *context, bool min_heap)
> {
> const int data[] = { 3, 1, 2, 4, 0x80000000, 0x7FFFFFFF, 0,
> -3, -1, -2, -4, 0x80000000, 0x7FFFFFFF };
> @@ -106,25 +99,22 @@ static __init int test_heap_push(bool min_heap)
> .less = min_heap ? less_than : greater_than,
> .swp = swap_ints,
> };
> - int i, temp, err;
> + int i, temp;
>
> /* Test with known set of values copied from data. */
> for (i = 0; i < ARRAY_SIZE(data); i++)
> min_heap_push(&heap, &data[i], &funcs);
> -
> - err = pop_verify_heap(min_heap, &heap, &funcs);
> + pop_verify_heap(context, min_heap, &heap, &funcs);
>
> /* Test with randomly generated values. */
> while (heap.nr < heap.size) {
> temp = get_random_int();
> min_heap_push(&heap, &temp, &funcs);
> }
> - err += pop_verify_heap(min_heap, &heap, &funcs);
> -
> - return err;
> + pop_verify_heap(context, min_heap, &heap, &funcs);
> }
>
> -static __init int test_heap_pop_push(bool min_heap)
> +static __init void test_heap_pop_push(struct kunit *context, bool min_heap)
> {
> const int data[] = { 3, 1, 2, 4, 0x80000000, 0x7FFFFFFF, 0,
> -3, -1, -2, -4, 0x80000000, 0x7FFFFFFF };
> @@ -139,7 +129,7 @@ static __init int test_heap_pop_push(bool min_heap)
> .less = min_heap ? less_than : greater_than,
> .swp = swap_ints,
> };
> - int i, temp, err;
> + int i, temp;
>
> /* Fill values with data to pop and replace. */
> temp = min_heap ? 0x80000000 : 0x7FFFFFFF;
> @@ -149,8 +139,7 @@ static __init int test_heap_pop_push(bool min_heap)
> /* Test with known set of values copied from data. */
> for (i = 0; i < ARRAY_SIZE(data); i++)
> min_heap_pop_push(&heap, &data[i], &funcs);
> -
> - err = pop_verify_heap(min_heap, &heap, &funcs);
> + pop_verify_heap(context, min_heap, &heap, &funcs);
>
> heap.nr = 0;
> for (i = 0; i < ARRAY_SIZE(data); i++)
> @@ -161,34 +150,54 @@ static __init int test_heap_pop_push(bool min_heap)
> temp = get_random_int();
> min_heap_pop_push(&heap, &temp, &funcs);
> }
> - err += pop_verify_heap(min_heap, &heap, &funcs);
> + pop_verify_heap(context, min_heap, &heap, &funcs);
> +}
>
> - return err;
> +static void __init test_heapify_all_true(struct kunit *context)
> +{
> + test_heapify_all(context, true);
> }
>
> -static int __init test_min_heap_init(void)
> +static void __init test_heapify_all_false(struct kunit *context)
> {
> - int err = 0;
> -
> - err += test_heapify_all(true);
> - err += test_heapify_all(false);
> - err += test_heap_push(true);
> - err += test_heap_push(false);
> - err += test_heap_pop_push(true);
> - err += test_heap_pop_push(false);
> - if (err) {
> - pr_err("test failed with %d errors\n", err);
> - return -EINVAL;
> - }
> - pr_info("test passed\n");
> - return 0;
> + test_heapify_all(context, true);
> +}
> +
> +static void __init test_heap_push_true(struct kunit *context)
> +{
> + test_heap_push(context, true);
> +}
> +
> +static void __init test_heap_push_false(struct kunit *context)
> +{
> + test_heap_push(context, false);
> }
> -module_init(test_min_heap_init);
>
> -static void __exit test_min_heap_exit(void)
> +static void __init test_heap_pop_push_true(struct kunit *context)
> {
> - /* do nothing */
> + test_heap_pop_push(context, true);
> }
> -module_exit(test_min_heap_exit);
> +
> +static void __init test_heap_pop_push_false(struct kunit *context)
> +{
> + test_heap_pop_push(context, false);
> +}
> +
> +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),
> + {}
> +};
> +
> +static struct kunit_suite min_heap_test_suite = {
> + .name = "min-heap",
> + .test_cases = min_heap_test_cases,
> +};
> +
> +kunit_test_suites(&min_heap_test_suite);
>
> MODULE_LICENSE("GPL");
>
> base-commit: d43c7fb05765152d4d4a39a8ef957c4ea14d8847
> --
> 2.26.2
>
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