test: applying timezone is asynchronous

So, we need to try to read timezone several times.
Also, on failure, show journal of timedated instead of hostnamed,
as the timezone is handled by timedated.

Hopefully fixes #33007.

1 files changed, 9 insertions, 6 deletions

diff --git a/test/networkd-test.py b/test/networkd-test.py
index 4ea76e1a94..7911c816d7 100755
--- a/test/networkd-test.py
+++ b/test/networkd-test.py
@@ -1053,13 +1053,16 @@ DNS=127.0.0.1
         self.create_iface(dhcpserver_opts='EmitTimezone=yes\nTimezone=Pacific/Honolulu')
         self.do_test(coldplug=None, extra_opts='IPv6AcceptRA=false\n[DHCP]\nUseTimezone=true', dhcp_mode='ipv4')
 
-        # should have applied the received timezone
-        try:
-            self.assertEqual(get_tz(), 'Pacific/Honolulu')
-        except AssertionError:
+        # Should have applied the received timezone. This is asynchronous, so we need to wait for a while:
+        for _ in range(20):
+            tz = get_tz()
+            if tz == 'Pacific/Honolulu':
+                break
+            time.sleep(0.5)
+        else:
             self.show_journal('systemd-networkd.service')
-            self.show_journal('systemd-hostnamed.service')
-            raise
+            self.show_journal('systemd-timedated.service')
+            self.fail(f'Timezone: {tz}, expected: Pacific/Honolulu')
 
 
 class MatchClientTest(unittest.TestCase, NetworkdTestingUtilities):