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.

diff --git a/test/networkd-test.py b/test/networkd-test.py
index 4ea76e1a94fb45964e64e07fb382087512efc8ba..7911c816d719ef915d3c8a8a4ca586a322674b07 100755 (executable)
--- 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):