tests: change dbus tests to use user bus (#6845)

This makes it possible to run more dbus tests in a build
environment/chroot where no system bus is available.
To run the dbus test one then can use dbus-run-session.

src/libsystemd/sd-bus/test-bus-cleanup.c

@@ -37,7 +37,7 @@ static int test_bus_open(void) {
         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
-        r = sd_bus_open_system(&bus);
+        r = sd_bus_open_user(&bus);
         if (r == -ECONNREFUSED || r == -ENOENT)
                 return r;
 
@@ -51,7 +51,7 @@ static void test_bus_new_method_call(void) {
         sd_bus *bus = NULL;
         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
 
-        assert_se(sd_bus_open_system(&bus) >= 0);
+        assert_se(sd_bus_open_user(&bus) >= 0);
 
         assert_se(sd_bus_message_new_method_call(bus, &m, "a.service.name", "/an/object/path", "an.interface.name", "AMethodName") >= 0);
 
@@ -65,7 +65,7 @@ static void test_bus_new_signal(void) {
         sd_bus *bus = NULL;
         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
 
-        assert_se(sd_bus_open_system(&bus) >= 0);
+        assert_se(sd_bus_open_user(&bus) >= 0);
 
         assert_se(sd_bus_message_new_signal(bus, &m, "/an/object/path", "an.interface.name", "Name") >= 0);
 

src/libsystemd/sd-bus/test-bus-gvariant.c

@@ -137,7 +137,7 @@ static void test_marshal(void) {
         size_t sz;
         int r;
 
-        r = sd_bus_open_system(&bus);
+        r = sd_bus_open_user(&bus);
         if (r < 0)
                 exit(EXIT_TEST_SKIP);
 

src/libsystemd/sd-bus/test-bus-marshal.c

@@ -137,7 +137,7 @@ int main(int argc, char *argv[]) {
         double dbl;
         uint64_t u64;
 
-        r = sd_bus_default_system(&bus);
+        r = sd_bus_default_user(&bus);
         if (r < 0)
                 return EXIT_TEST_SKIP;
 

src/libsystemd/sd-bus/test-bus-match.c

@@ -94,7 +94,7 @@ int main(int argc, char *argv[]) {
         sd_bus_slot slots[19];
         int r;
 
-        r = sd_bus_open_system(&bus);
+        r = sd_bus_open_user(&bus);
         if (r < 0)
                 return EXIT_TEST_SKIP;
 

src/libsystemd/sd-bus/test-bus-track.c

@@ -64,7 +64,7 @@ int main(int argc, char *argv[]) {
         r = sd_event_default(&event);
         assert_se(r >= 0);
 
-        r = sd_bus_open_system(&a);
+        r = sd_bus_open_user(&a);
         if (IN_SET(r, -ECONNREFUSED, -ENOENT)) {
                 log_info("Failed to connect to bus, skipping tests.");
                 return EXIT_TEST_SKIP;
@@ -74,7 +74,7 @@ int main(int argc, char *argv[]) {
         r = sd_bus_attach_event(a, event, SD_EVENT_PRIORITY_NORMAL);
         assert_se(r >= 0);
 
-        r = sd_bus_open_system(&b);
+        r = sd_bus_open_user(&b);
         assert_se(r >= 0);
 
         r = sd_bus_attach_event(b, event, SD_EVENT_PRIORITY_NORMAL);