tests: skip bus test if bus cannot be opened

To make the result more visible, special return value
is used to tell automake that the test was skipped. While
at it, use the same return value in other skipped tests.

src/libsystemd-bus/test-bus-chat.c

@@ -27,6 +27,7 @@
 
 #include "log.h"
 #include "util.h"
+#include "macro.h"
 
 #include "sd-bus.h"
 #include "bus-message.h"
@@ -543,8 +544,10 @@ int main(int argc, char *argv[]) {
         int q, r;
 
         r = server_init(&bus);
-        if (r < 0)
-                return EXIT_FAILURE;
+        if (r < 0) {
+                log_info("Failed to connect to bus, skipping tests.");
+                return EXIT_TEST_SKIP;
+        }
 
         log_info("Initialized...");
 

src/shared/macro.h

@@ -46,6 +46,9 @@
 #define _introspect_(x) __attribute__((section("introspect." x)))
 #define _alignas_(x) __attribute__((aligned(__alignof(x))))
 
+/* automake test harness */
+#define EXIT_TEST_SKIP 77
+
 #define XSTRINGIFY(x) #x
 #define STRINGIFY(x) XSTRINGIFY(x)
 

src/test/test-sched-prio.c

@@ -22,7 +22,7 @@
 #include <sched.h>
 
 #include "manager.h"
-
+#include "macro.h"
 
 int main(int argc, char *argv[]) {
         Manager *m;
@@ -37,7 +37,7 @@ int main(int argc, char *argv[]) {
         r = manager_new(SYSTEMD_USER, &m);
         if (r == -EPERM) {
                 puts("manager_new: Permission denied. Skipping test.");
-                return EXIT_SUCCESS;
+                return EXIT_TEST_SKIP;
         }
         assert(r >= 0);
         assert_se(manager_startup(m, serial, fdset) >= 0);

src/test/test-unit-name.c

@@ -108,7 +108,7 @@ static void test_replacements(void) {
 #undef expect
 }
 
-static void test_unit_printf(void) {
+static int test_unit_printf(void) {
         Manager *m;
         Unit *u, *u2;
         int r;
@@ -126,7 +126,7 @@ static void test_unit_printf(void) {
         r = manager_new(SYSTEMD_USER, &m);
         if (r == -EPERM) {
                 puts("manager_new: Permission denied. Skipping test.");
-                return;
+                return EXIT_TEST_SKIP;
         }
         assert(r == 0);
 
@@ -189,11 +189,11 @@ static void test_unit_printf(void) {
         expect(u2, "%b", bid);
         expect(u2, "%H", host);
         expect(u2, "%t", "/run/user/*");
+
+        return 0;
 }
 
 int main(int argc, char* argv[]) {
         test_replacements();
-        test_unit_printf();
-
-        return 0;
+        return test_unit_printf();
 }