man: describe functions for appending to messages

[elogind.git] / src / libsystemd / sd-bus / test-bus-marshal.c

diff --git a/src/libsystemd/sd-bus/test-bus-marshal.c b/src/libsystemd/sd-bus/test-bus-marshal.c
index 85aaf95d6c31ea23902bdea2fc27c7690ca666fe..d438a231a635426cfffaf812fd0ae76d5169cc38 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-marshal.c
+++ b/src/libsystemd/sd-bus/test-bus-marshal.c
@@ -79,6 +79,9 @@ int main(int argc, char *argv[]) {
         r = sd_bus_message_new_method_call(NULL, &m, "foobar.waldo", "/", "foobar.waldo", "Piep");
         assert_se(r >= 0);
 
+        r = sd_bus_message_append(m, "");
+        assert_se(r >= 0);
+
         r = sd_bus_message_append(m, "s", "a string");
         assert_se(r >= 0);