sd-login: test - fix failure when run from non-graphical seat

Observed when running from the console of a systemd nspawn container
(see failure below).

The value of r was tested, when r was last set by
sd_session_can_graphical().  This did not correspond to the value expected.

Fix the code, so we compare relevant values now.  Hopefully :).


Test failure
------------

/* Information printed is from the live system */
sd_pid_get_unit(0, …) → "session-13.scope"
sd_pid_get_user_unit(0, …) → "n/a"
sd_pid_get_slice(0, …) → "user-1000.slice"
sd_pid_get_session(0, …) → "13"
sd_pid_get_owner_uid(0, …) → 1000
sd_pid_get_cgroup(0, …) → "/user.slice/user-1000.slice/session-13.scope"
sd_uid_get_display(1000, …) → "13"
sd_uid_get_sessions(1000, …) → [2] "15 13"
sd_uid_get_seats(1000, …) → [1] "seat0"
sd_session_is_active("13") → yes
sd_session_is_remote("13") → no
sd_session_get_state("13") → "active"
sd_session_get_uid("13") → 1000
sd_session_get_type("13") → "tty"
sd_session_get_class("13") → "user"
sd_session_get_display("13") → "n/a"
sd_session_get_remote_user("13") → "n/a"
sd_session_get_remote_host("13") → "n/a"
sd_session_get_seat("13") → "seat0"
sd_session_can_multi_seat("seat0") → no
sd_session_can_tty("seat0") → no
sd_session_can_graphical("seat0") → no
sd_uid_get_state(1000, …) → active
Assertion '!!k == !!r' failed at ../src/libsystemd/sd-login/test-login.c:191, function test_login(). Aborting.

1 files changed, 7 insertions, 6 deletions

diff --git a/src/libsystemd/sd-login/test-login.c b/src/libsystemd/sd-login/test-login.c
index 831339eeb4..02a73f9189 100644
--- a/src/libsystemd/sd-login/test-login.c
+++ b/src/libsystemd/sd-login/test-login.c
@@ -55,7 +55,7 @@ static void test_login(void) {
                 *type = NULL, *class = NULL, *state = NULL, *state2 = NULL,
                 *seat = NULL, *session = NULL,
                 *unit = NULL, *user_unit = NULL, *slice = NULL;
-        int r, k;
+        int r;
         uid_t u, u2;
         char *t, **seats, **sessions;
 
@@ -186,13 +186,14 @@ static void test_login(void) {
 
                 assert_se(sd_uid_is_on_seat(u, 0, seat) > 0);
 
-                k = sd_uid_is_on_seat(u, 1, seat);
-                assert_se(k >= 0);
-                assert_se(!!k == !!r);
-
-                assert_se(sd_seat_get_active(seat, &session2, &u2) >= 0);
+                r = sd_seat_get_active(seat, &session2, &u2);
+                assert_se(r >= 0);
                 log_info("sd_seat_get_active(\"%s\", …) → \"%s\", "UID_FMT, seat, session2, u2);
 
+                r = sd_uid_is_on_seat(u, 1, seat);
+                assert_se(r >= 0);
+                assert_se(!!r == streq(session, session2));
+
                 r = sd_seat_get_sessions(seat, &sessions, &uids, &n);
                 assert_se(r >= 0);
                 assert_se(r == (int) strv_length(sessions));