[PATCH v2 01/32] selftests: harness: Add harness selftest

["Thomas Weißschuh" <thomas.weissschuh@linutronix.de>]

Add a selftest for the harness itself so any changes can be validated.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
 tools/testing/selftests/Makefile                   |   1 +
 tools/testing/selftests/kselftest/.gitignore       |   1 +
 tools/testing/selftests/kselftest/Makefile         |   6 +
 .../testing/selftests/kselftest/harness-selftest.c | 129 +++++++++++++++++++++
 .../selftests/kselftest/harness-selftest.expected  |  62 ++++++++++
 .../selftests/kselftest/harness-selftest.sh        |  14 +++
 6 files changed, 213 insertions(+)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index c77c8c8e3d9bdd8047c9cb7722c3830447e504e5..3ce071eefa86af59aadd1df7972fdf3bf6e01d52 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -48,6 +48,7 @@ TARGETS += ipc
 TARGETS += ir
 TARGETS += kcmp
 TARGETS += kexec
+TARGETS += kselftest
 TARGETS += kvm
 TARGETS += landlock
 TARGETS += lib
diff --git a/tools/testing/selftests/kselftest/.gitignore b/tools/testing/selftests/kselftest/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..9aab194e8ea25a2c5ccc116f9f728b8afd0c51c4
--- /dev/null
+++ b/tools/testing/selftests/kselftest/.gitignore
@@ -0,0 +1 @@
+/harness-selftest
diff --git a/tools/testing/selftests/kselftest/Makefile b/tools/testing/selftests/kselftest/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..2f2933553dbc47014d9dfe0b4bd8ad3bc36e38c2
--- /dev/null
+++ b/tools/testing/selftests/kselftest/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+
+TEST_GEN_PROGS_EXTENDED := harness-selftest
+TEST_PROGS := harness-selftest.sh
+
+include ../lib.mk
diff --git a/tools/testing/selftests/kselftest/harness-selftest.c b/tools/testing/selftests/kselftest/harness-selftest.c
new file mode 100644
index 0000000000000000000000000000000000000000..8d39e7a0b99c41a5d33edfe2dbf875cac04c098d
--- /dev/null
+++ b/tools/testing/selftests/kselftest/harness-selftest.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <stdio.h>
+
+#ifndef NOLIBC
+#include <sys/resource.h>
+#include <sys/prctl.h>
+#endif
+
+/* Avoid any inconsistencies */
+#define TH_LOG_STREAM stdout
+
+#include "../kselftest_harness.h"
+
+TEST(standalone_pass) {
+	TH_LOG("before");
+	ASSERT_EQ(0, 0);
+	EXPECT_EQ(0, 0);
+	TH_LOG("after");
+}
+
+TEST(standalone_fail) {
+	TH_LOG("before");
+	EXPECT_EQ(0, 0);
+	EXPECT_EQ(0, 1);
+	ASSERT_EQ(0, 1);
+	TH_LOG("after");
+}
+
+TEST_SIGNAL(signal_pass, SIGUSR1) {
+	TH_LOG("before");
+	ASSERT_EQ(0, 0);
+	TH_LOG("after");
+	kill(getpid(), SIGUSR1);
+}
+
+TEST_SIGNAL(signal_fail, SIGUSR1) {
+	TH_LOG("before");
+	ASSERT_EQ(0, 1);
+	TH_LOG("after");
+	kill(getpid(), SIGUSR1);
+}
+
+FIXTURE(fixture) {
+	pid_t testpid;
+};
+
+FIXTURE_SETUP(fixture) {
+	TH_LOG("setup");
+	self->testpid = getpid();
+}
+
+FIXTURE_TEARDOWN(fixture) {
+	TH_LOG("teardown same-process=%d", self->testpid == getpid());
+}
+
+TEST_F(fixture, pass) {
+	TH_LOG("before");
+	ASSERT_EQ(0, 0);
+	TH_LOG("after");
+}
+
+TEST_F(fixture, fail) {
+	TH_LOG("before");
+	ASSERT_EQ(0, 1);
+	TH_LOG("after");
+}
+
+TEST_F_TIMEOUT(fixture, timeout, 1) {
+	TH_LOG("before");
+	sleep(2);
+	TH_LOG("after");
+}
+
+FIXTURE(fixture_parent) {
+	pid_t testpid;
+};
+
+FIXTURE_SETUP(fixture_parent) {
+	TH_LOG("setup");
+	self->testpid = getpid();
+}
+
+FIXTURE_TEARDOWN_PARENT(fixture_parent) {
+	TH_LOG("teardown same-process=%d", self->testpid == getpid());
+}
+
+TEST_F(fixture_parent, pass) {
+	TH_LOG("before");
+	ASSERT_EQ(0, 0);
+	TH_LOG("after");
+}
+
+FIXTURE(fixture_setup_failure) {
+	pid_t testpid;
+};
+
+FIXTURE_SETUP(fixture_setup_failure) {
+	TH_LOG("setup");
+	self->testpid = getpid();
+	ASSERT_EQ(0, 1);
+}
+
+FIXTURE_TEARDOWN(fixture_setup_failure) {
+	TH_LOG("teardown same-process=%d", self->testpid == getpid());
+}
+
+TEST_F(fixture_setup_failure, pass) {
+	TH_LOG("before");
+	ASSERT_EQ(0, 0);
+	TH_LOG("after");
+}
+
+int main(int argc, char **argv)
+{
+	/*
+	 * The harness uses abort() to signal assertion failures, which triggers coredumps.
+	 * This may be useful to debug real failures but not for this selftest, disable them.
+	 */
+	struct rlimit rlimit = {
+		.rlim_cur = 0,
+		.rlim_max = 0,
+	};
+
+	prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
+	setrlimit(RLIMIT_CORE, &rlimit);
+
+	return test_harness_run(argc, argv);
+}
diff --git a/tools/testing/selftests/kselftest/harness-selftest.expected b/tools/testing/selftests/kselftest/harness-selftest.expected
new file mode 100644
index 0000000000000000000000000000000000000000..1aa6461db90d4e7cc0679f19b69aadf4032875ec
--- /dev/null
+++ b/tools/testing/selftests/kselftest/harness-selftest.expected
@@ -0,0 +1,62 @@
+TAP version 13
+1..9
+# Starting 9 tests from 4 test cases.
+#  RUN           global.standalone_pass ...
+# harness-selftest.c:16:standalone_pass:before
+# harness-selftest.c:19:standalone_pass:after
+#            OK  global.standalone_pass
+ok 1 global.standalone_pass
+#  RUN           global.standalone_fail ...
+# harness-selftest.c:23:standalone_fail:before
+# harness-selftest.c:25:standalone_fail:Expected 0 (0) == 1 (1)
+# harness-selftest.c:26:standalone_fail:Expected 0 (0) == 1 (1)
+# standalone_fail: Test terminated by assertion
+#          FAIL  global.standalone_fail
+not ok 2 global.standalone_fail
+#  RUN           global.signal_pass ...
+# harness-selftest.c:31:signal_pass:before
+# harness-selftest.c:33:signal_pass:after
+#            OK  global.signal_pass
+ok 3 global.signal_pass
+#  RUN           global.signal_fail ...
+# harness-selftest.c:38:signal_fail:before
+# harness-selftest.c:39:signal_fail:Expected 0 (0) == 1 (1)
+# signal_fail: Test terminated by assertion
+#          FAIL  global.signal_fail
+not ok 4 global.signal_fail
+#  RUN           fixture.pass ...
+# harness-selftest.c:49:pass:setup
+# harness-selftest.c:58:pass:before
+# harness-selftest.c:60:pass:after
+# harness-selftest.c:54:pass:teardown same-process=1
+#            OK  fixture.pass
+ok 5 fixture.pass
+#  RUN           fixture.fail ...
+# harness-selftest.c:49:fail:setup
+# harness-selftest.c:64:fail:before
+# harness-selftest.c:65:fail:Expected 0 (0) == 1 (1)
+# harness-selftest.c:54:fail:teardown same-process=1
+# fail: Test terminated by assertion
+#          FAIL  fixture.fail
+not ok 6 fixture.fail
+#  RUN           fixture.timeout ...
+# harness-selftest.c:49:timeout:setup
+# harness-selftest.c:70:timeout:before
+# timeout: Test terminated by timeout
+#          FAIL  fixture.timeout
+not ok 7 fixture.timeout
+#  RUN           fixture_parent.pass ...
+# harness-selftest.c:80:pass:setup
+# harness-selftest.c:89:pass:before
+# harness-selftest.c:91:pass:after
+# harness-selftest.c:85:pass:teardown same-process=0
+#            OK  fixture_parent.pass
+ok 8 fixture_parent.pass
+#  RUN           fixture_setup_failure.pass ...
+# harness-selftest.c:99:pass:setup
+# harness-selftest.c:101:pass:Expected 0 (0) == 1 (1)
+# pass: Test terminated by assertion
+#          FAIL  fixture_setup_failure.pass
+not ok 9 fixture_setup_failure.pass
+# FAILED: 4 / 9 tests passed.
+# Totals: pass:4 fail:5 xfail:0 xpass:0 skip:0 error:0
diff --git a/tools/testing/selftests/kselftest/harness-selftest.sh b/tools/testing/selftests/kselftest/harness-selftest.sh
new file mode 100755
index 0000000000000000000000000000000000000000..bf691adf0b41aaedb2fbc5f06add9fd1d5689044
--- /dev/null
+++ b/tools/testing/selftests/kselftest/harness-selftest.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Selftest for kselftest_harness.h
+#
+
+DIR="$(dirname $(readlink -f "$0"))"
+
+TMPFILE="$(mktemp)"
+trap 'rm "$TMPFILE"' EXIT
+
+$DIR/harness-selftest > "$TMPFILE"
+
+diff -u "$DIR"/harness-selftest.expected "$TMPFILE"

-- 
2.49.0