[PATCH 3/5] kselftest: run tests by fixture

[Jakub Kicinski]

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.

Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
---
 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