tests: use the test helpers in more places

This is mostly cosmetic. It makes those test binaries support SYSTEMD_LOG_*
environment variables.

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

@@ -4,6 +4,7 @@
 #include "log.h"
 #include "string-util.h"
 #include "strv.h"
+#include "tests.h"
 
 static void test_one_address(sd_bus *b,
                              const char *host,
@@ -59,9 +60,7 @@ static void test_bus_set_address_system_remote(char **args) {
 }
 
 int main(int argc, char *argv[]) {
-        log_set_max_level(LOG_INFO);
-        log_parse_environment();
-        log_open();
+        test_setup_logging(LOG_INFO);
 
         test_bus_set_address_system_remote(argv + 1);
 

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

@@ -2,6 +2,7 @@
 
 #include "bus-introspect.h"
 #include "log.h"
+#include "tests.h"
 
 static int prop_get(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) {
         return -EINVAL;
@@ -29,7 +30,7 @@ static const sd_bus_vtable vtable[] = {
 int main(int argc, char *argv[]) {
         struct introspect intro;
 
-        log_set_max_level(LOG_DEBUG);
+        test_setup_logging(LOG_DEBUG);
 
         assert_se(introspect_begin(&intro, false) >= 0);
 

src/libsystemd/sd-bus/test-bus-queue-ref-cycle.c

@@ -1,10 +1,10 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
+#include "sd-bus.h"
 
 #include "main-func.h"
-#include "sd-bus.h"
 #include "tests.h"
 
-static int run(int argc, char *argv[]) {
+static int test_ref_unref(void) {
         sd_bus_message *m = NULL;
         sd_bus *bus = NULL;
         int r;
@@ -41,4 +41,16 @@ static int run(int argc, char *argv[]) {
         return 0;
 }
 
+static int run(int argc, char *argv[]) {
+        int r;
+
+        test_setup_logging(LOG_INFO);
+
+        r = test_ref_unref();
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
 DEFINE_MAIN_FUNCTION(run);

src/libsystemd/sd-bus/test-bus-watch-bind.c

@@ -16,6 +16,7 @@
 #include "socket-util.h"
 #include "string-util.h"
 #include "tmpfile-util.h"
+#include "tests.h"
 
 static int method_foobar(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
         log_info("Got Foobar() call.");
@@ -198,7 +199,7 @@ int main(int argc, char *argv[]) {
         pthread_t server, client1, client2;
         char *path;
 
-        log_set_max_level(LOG_DEBUG);
+        test_setup_logging(LOG_DEBUG);
 
         /* We use /dev/shm here rather than /tmp, since some weird distros might set up /tmp as some weird fs that
          * doesn't support inotify properly. */