support/tests: enhance the runtime systemd tests

Recent systemd bump has broken DBus dameon and DBus applications can no
longer find the daemon. So we want to catch those kind of failures
early.

We also want to check that the system as a whole is stable: no unit
should be failed.

Finally, ensure that we can read the jounrnal, even when we are doing our
tricks on read-only systems.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/support/testing/tests/init/test_systemd.py b/support/testing/tests/init/test_systemd.py
index 48fac1490f228969e6631c4c743524d121821b80..a324ba85693b581fc2f1861d970aa4b9c8a92e54 100644 (file)
--- a/support/testing/tests/init/test_systemd.py
+++ b/support/testing/tests/init/test_systemd.py
@@ -21,6 +21,18 @@ class InitSystemSystemdBase(InitSystemBase):
     def check_init(self):
         super(InitSystemSystemdBase, self).check_init("/lib/systemd/systemd")
 
+        # Test all units are OK
+        output, _ = self.emulator.run("systemctl --no-pager --failed --no-legend")
+        self.assertEqual(len(output), 0)
+
+        # Test we can reach the DBus daemon
+        _, exit_code = self.emulator.run("busctl --no-pager")
+        self.assertEqual(exit_code, 0)
+
+        # Test we can read at least one line from the journal
+        output, _ = self.emulator.run("journalctl --no-pager --lines 1 --quiet")
+        self.assertEqual(len(output), 1)
+
 
 class TestInitSystemSystemdRoNetworkd(InitSystemSystemdBase):
     config = InitSystemSystemdBase.config + \