[PATCH 2/5] libtracefs: Unit tests for tracing options APIs

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

Unit tests for these new APIs:

tracefs_options_get_supported();
tracefs_option_is_supported();
tracefs_options_get_enabled();
tracefs_option_is_enabled();
tracefs_options_set();
tracefs_options_clear();
tracefs_option_string();

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 utest/tracefs-utest.c | 125 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)

diff --git a/utest/tracefs-utest.c b/utest/tracefs-utest.c
index 0520f49..1ade5dd 100644
--- a/utest/tracefs-utest.c
+++ b/utest/tracefs-utest.c
@@ -452,6 +452,129 @@ static void test_tracing_onoff(void)
 		close(fd);
 }
 
+static bool check_option(long long id, bool exist, int enabled)
+{
+	const char *name = tracefs_option_string(id);
+	char file[PATH_MAX];
+	char *path = NULL;
+	bool ret = false;
+	bool supported;
+	struct stat st;
+	char buf[10];
+	int fd;
+	int r;
+	int rstat;
+
+	CU_TEST(name != NULL);
+	supported = tracefs_option_is_supported(test_instance, id);
+	CU_TEST(supported == exist);
+	if (supported != exist)
+		goto out;
+	snprintf(file, PATH_MAX, "options/%s", name);
+	path = tracefs_instance_get_file(test_instance, file);
+	CU_TEST(path != NULL);
+	rstat = stat(path, &st);
+	if (exist) {
+		CU_TEST(rstat == 0);
+		if (rstat != 0)
+			goto out;
+	} else {
+		CU_TEST(stat(path, &st) == -1);
+		if (rstat != -1)
+			goto out;
+	}
+
+	fd = open(path, O_RDONLY);
+	if (exist) {
+		CU_TEST(fd >= 0);
+		if (fd < 0)
+			goto out;
+	} else {
+		CU_TEST(fd < 0);
+		if (fd >= 0)
+			goto out;
+	}
+
+	if (exist && enabled >= 0) {
+		int val = enabled ? '1' : '0';
+
+		r = read(fd, buf, 10);
+		CU_TEST(r == 2);
+		CU_TEST(buf[0] == val);
+		if (buf[0] != val)
+			goto out;
+	}
+
+	ret = true;
+out:
+	tracefs_put_tracing_file(path);
+	if (fd >= 0)
+		close(fd);
+	return ret;
+}
+
+static void test_tracing_options(void)
+{
+	unsigned long long options_enabled = 0;
+	unsigned long long options_all = 0;
+	unsigned long long i = 1;
+	char file[PATH_MAX];
+	const char *name;
+
+	options_all = tracefs_options_get_supported(test_instance);
+	options_enabled = tracefs_options_get_enabled(test_instance);
+	CU_TEST(options_all > 0);
+
+	/* Invalid parameters test */
+	CU_TEST(!tracefs_option_is_supported(test_instance, TRACEFS_OPTION_INVALID << 1));
+	CU_TEST(!tracefs_option_is_enabled(test_instance, TRACEFS_OPTION_INVALID << 1));
+	CU_TEST(tracefs_options_set(test_instance, TRACEFS_OPTION_INVALID << 1) == -1);
+	CU_TEST(tracefs_options_clear(test_instance, TRACEFS_OPTION_INVALID << 1) == -1);
+	name = tracefs_option_string(TRACEFS_OPTION_INVALID << 1);
+	CU_TEST(!strcmp(name, "unknown"));
+
+	/* Test all valid options */
+	do {
+		name = tracefs_option_string(i);
+		CU_TEST(name != NULL);
+		CU_TEST(strcmp(name, "unknown"));
+		snprintf(file, PATH_MAX, "options/%s", name);
+
+		if (options_all & i) {
+			options_all &= ~i;
+			CU_TEST(check_option(i, true, -1));
+			CU_TEST(tracefs_option_is_supported(test_instance, i));
+		} else {
+			CU_TEST(check_option(i, false, -1));
+			CU_TEST(!tracefs_option_is_supported(test_instance, i));
+		}
+
+		if (options_enabled & i) {
+			options_enabled &= ~i;
+			CU_TEST(check_option(i, true, 1));
+			CU_TEST(tracefs_option_is_supported(test_instance, i));
+			CU_TEST(tracefs_option_is_enabled(test_instance, i));
+			CU_TEST(tracefs_options_clear(test_instance, i) == 0);
+			CU_TEST(check_option(i, true, 0));
+			CU_TEST(tracefs_options_set(test_instance, i) == 0);
+			CU_TEST(check_option(i, true, 1));
+		} else if (options_all & i) {
+			CU_TEST(check_option(i, true, 0));
+			CU_TEST(tracefs_option_is_supported(test_instance, i));
+			CU_TEST(!tracefs_option_is_enabled(test_instance, i));
+			CU_TEST(tracefs_options_set(test_instance, i) == 0);
+			CU_TEST(check_option(i, true, 1));
+			CU_TEST(tracefs_options_clear(test_instance, i) == 0);
+			CU_TEST(check_option(i, true, 0));
+		}
+		i <<= 1;
+	} while (i < TRACEFS_OPTION_INVALID);
+
+	CU_TEST(options_all == 0);
+	CU_TEST(options_enabled == 0);
+
+}
+
 static void exclude_string(char **strings, char *name)
 {
 	int i;
@@ -761,5 +884,7 @@ void test_tracefs_lib(void)
 		    test_get_clock);
 	CU_add_test(suite, "tracing on / off",
 		    test_tracing_onoff);
+	CU_add_test(suite, "tracing options",
+		    test_tracing_options);
 
 }
-- 
2.29.2