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SubjectRe: [PATCH 3/5] kselftest: run tests by fixture
On Thu, Mar 12, 2020 at 08:17:50PM -0700, Jakub Kicinski wrote:
> Now that all tests have a fixture object move from a global
> list of tests to a list of tests per fixture.
>
> Order of tests may change as we will now group and run test
> fixture by fixture, rather than in declaration order.

I'm not convinced about this change. Declaration order is a pretty
intuitive result that I'd like to keep for the harness.

Can this change be avoided and still keep the final results of a
"mutable" fixture?

-Kees

>
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
> ---
> tools/testing/selftests/kselftest_harness.h | 42 ++++++++++++---------
> 1 file changed, 25 insertions(+), 17 deletions(-)
>
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index a396afe4a579..7a3392941a5b 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -637,8 +637,11 @@
> } while (0); OPTIONAL_HANDLER(_assert)
>
> /* Contains all the information about a fixture */
> +struct __test_metadata;
> +
> struct __fixture_metadata {
> const char *name;
> + struct __test_metadata *tests;
> struct __fixture_metadata *prev, *next;
> } _fixture_global __attribute__((unused)) = {
> .name = "global",
> @@ -684,7 +687,6 @@ struct __test_metadata {
> };
>
> /* Storage for the (global) tests to be run. */
> -static struct __test_metadata *__test_list;
> static unsigned int __test_count;
>
> /*
> @@ -698,24 +700,26 @@ static unsigned int __test_count;
> */
> static inline void __register_test(struct __test_metadata *t)
> {
> + struct __fixture_metadata *f = t->fixture;
> +
> __test_count++;
> /* Circular linked list where only prev is circular. */
> - if (__test_list == NULL) {
> - __test_list = t;
> + if (f->tests == NULL) {
> + f->tests = t;
> t->next = NULL;
> t->prev = t;
> return;
> }
> if (__constructor_order == _CONSTRUCTOR_ORDER_FORWARD) {
> t->next = NULL;
> - t->prev = __test_list->prev;
> + t->prev = f->tests->prev;
> t->prev->next = t;
> - __test_list->prev = t;
> + f->tests->prev = t;
> } else {
> - t->next = __test_list;
> + t->next = f->tests;
> t->next->prev = t;
> t->prev = t;
> - __test_list = t;
> + f->tests = t;
> }
> }
>
> @@ -729,14 +733,15 @@ static inline int __bail(int for_realz, bool no_print, __u8 step)
> return 0;
> }
>
> -void __run_test(struct __test_metadata *t)
> +void __run_test(struct __fixture_metadata *f,
> + struct __test_metadata *t)
> {
> pid_t child_pid;
> int status;
>
> t->passed = 1;
> t->trigger = 0;
> - printf("[ RUN ] %s.%s\n", t->fixture->name, t->name);
> + printf("[ RUN ] %s.%s\n", f->name, t->name);
> alarm(t->timeout);
> child_pid = fork();
> if (child_pid < 0) {
> @@ -786,13 +791,14 @@ void __run_test(struct __test_metadata *t)
> }
> }
> printf("[ %4s ] %s.%s\n", (t->passed ? "OK" : "FAIL"),
> - t->fixture->name, t->name);
> + f->name, t->name);
> alarm(0);
> }
>
> static int test_harness_run(int __attribute__((unused)) argc,
> char __attribute__((unused)) **argv)
> {
> + struct __fixture_metadata *f;
> struct __test_metadata *t;
> int ret = 0;
> unsigned int count = 0;
> @@ -801,13 +807,15 @@ static int test_harness_run(int __attribute__((unused)) argc,
> /* TODO(wad) add optional arguments similar to gtest. */
> printf("[==========] Running %u tests from %u test cases.\n",
> __test_count, __fixture_count + 1);
> - for (t = __test_list; t; t = t->next) {
> - count++;
> - __run_test(t);
> - if (t->passed)
> - pass_count++;
> - else
> - ret = 1;
> + for (f = __fixture_list; f; f = f->next) {
> + for (t = f->tests; t; t = t->next) {
> + count++;
> + __run_test(f, t);
> + if (t->passed)
> + pass_count++;
> + else
> + ret = 1;
> + }
> }
> printf("[==========] %u / %u tests passed.\n", pass_count, count);
> printf("[ %s ]\n", (ret ? "FAILED" : "PASSED"));
> --
> 2.24.1
>

--
Kees Cook

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