selftests: harness: Validate intermixing of kselftest and harness functionality

Make sure that calling ksft_test_result_*() functions from harness
tests work as expected.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://lore.kernel.org/r/20260302-kselftest-harness-v2-5-3143aa41d989@linutronix.de
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

Author: t-8ch

tools/testing/selftests/kselftest_harness/harness-selftest.c

@@ -138,6 +138,26 @@ TEST(exit_skip) {
 	exit(KSFT_SKIP);
 }
 
+TEST(test_result_pass) {
+	ksft_test_result_pass("");
+}
+
+TEST(test_result_xpass) {
+	ksft_test_result_xpass("");
+}
+
+TEST(test_result_fail) {
+	ksft_test_result_fail("");
+}
+
+TEST(test_result_xfail) {
+	ksft_test_result_xfail("");
+}
+
+TEST(test_result_skip) {
+	ksft_test_result_skip("");
+}
+
 int main(int argc, char **argv)
 {
 	/*

tools/testing/selftests/kselftest_harness/harness-selftest.expected

@@ -1,6 +1,6 @@
 TAP version 13
-1..14
-# Starting 14 tests from 4 test cases.
+1..19
+# Starting 19 tests from 4 test cases.
 #  RUN           global.standalone_pass ...
 # harness-selftest.c:19:standalone_pass:before
 # harness-selftest.c:23:standalone_pass:after
@@ -40,6 +40,23 @@ ok 8 global.exit_xfail # XFAIL unknown
 #  RUN           global.exit_skip ...
 #            OK  global.exit_skip
 ok 9 global.exit_skip # SKIP unknown
+#  RUN           global.test_result_pass ...
+#            OK  global.test_result_pass
+ok 10 global.test_result_pass
+#  RUN           global.test_result_xpass ...
+#            OK  global.test_result_xpass
+ok 11 global.test_result_xpass
+#  RUN           global.test_result_fail ...
+not ok 1 # Illegal usage of low-level ksft APIs in harness test
+# test_result_fail: Test failed
+#          FAIL  global.test_result_fail
+not ok 12 global.test_result_fail
+#  RUN           global.test_result_xfail ...
+#            OK  global.test_result_xfail
+ok 13 global.test_result_xfail
+#  RUN           global.test_result_skip ...
+#            OK  global.test_result_skip
+ok 14 global.test_result_skip
 #  RUN           fixture.pass ...
 # harness-selftest.c:53:pass:setup
 # harness-selftest.c:62:pass:before
@@ -48,34 +65,34 @@ ok 9 global.exit_skip # SKIP unknown
 # harness-selftest.c:66:pass:after
 # harness-selftest.c:58:pass:teardown same-process=1
 #            OK  fixture.pass
-ok 10 fixture.pass
+ok 15 fixture.pass
 #  RUN           fixture.fail ...
 # harness-selftest.c:53:fail:setup
 # harness-selftest.c:70:fail:before
 # harness-selftest.c:71:fail:Expected 0 (0) == 1 (1)
 # harness-selftest.c:58:fail:teardown same-process=1
 # fail: Test terminated by assertion
 #          FAIL  fixture.fail
-not ok 11 fixture.fail
+not ok 16 fixture.fail
 #  RUN           fixture.timeout ...
 # harness-selftest.c:53:timeout:setup
 # harness-selftest.c:77:timeout:before
 # timeout: Test terminated by timeout
 #          FAIL  fixture.timeout
-not ok 12 fixture.timeout
+not ok 17 fixture.timeout
 #  RUN           fixture_parent.pass ...
 # harness-selftest.c:87:pass:setup
 # harness-selftest.c:96:pass:before
 # harness-selftest.c:98:pass:after
 # harness-selftest.c:92:pass:teardown same-process=0
 #            OK  fixture_parent.pass
-ok 13 fixture_parent.pass
+ok 18 fixture_parent.pass
 #  RUN           fixture_setup_failure.pass ...
 # harness-selftest.c:106:pass:setup
 # harness-selftest.c:108:pass:Expected 0 (0) == 1 (1)
 # pass: Test terminated by assertion
 #          FAIL  fixture_setup_failure.pass
-not ok 14 fixture_setup_failure.pass
-# FAILED: 8 / 14 tests passed.
+not ok 19 fixture_setup_failure.pass
+# FAILED: 12 / 19 tests passed.
 # 1 skipped test(s) detected. Consider enabling relevant config options to improve coverage.
-# Totals: pass:5 fail:6 xfail:1 xpass:1 skip:1 error:0
+# Totals: pass:9 fail:7 xfail:1 xpass:1 skip:1 error:0