networkd-test: show service journal on startup failure

This provides easier evaluation of failed tests.

diff --git a/test/networkd-test.py b/test/networkd-test.py
index 9487910..7c921c2 100755 (executable)
--- a/test/networkd-test.py
+++ b/test/networkd-test.py
@@ -335,13 +335,16 @@ class ClientTestBase(NetworkdTestingUtilities):
 
         raise NotImplementedError('must be implemented by a subclass')
 
-    def do_test(self, coldplug=True, ipv6=False, extra_opts='',
-                online_timeout=10, dhcp_mode='yes'):
+    def start_unit(self, unit):
         try:
-            subprocess.check_call(['systemctl', 'start', 'systemd-resolved'])
+            subprocess.check_call(['systemctl', 'start', unit])
         except subprocess.CalledProcessError:
-            self.show_journal('systemd-resolved.service')
+            self.show_journal(unit)
             raise
+
+    def do_test(self, coldplug=True, ipv6=False, extra_opts='',
+                online_timeout=10, dhcp_mode='yes'):
+        self.start_unit('systemd-resolved')
         self.write_network(self.config, '''\
 [Match]
 Name={}
@@ -352,14 +355,14 @@ DHCP={}
         if coldplug:
             # create interface first, then start networkd
             self.create_iface(ipv6=ipv6)
-            subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
+            self.start_unit('systemd-networkd')
         elif coldplug is not None:
             # start networkd first, then create interface
-            subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
+            self.start_unit('systemd-networkd')
             self.create_iface(ipv6=ipv6)
         else:
             # "None" means test sets up interface by itself
-            subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
+            self.start_unit('systemd-networkd')
 
         try:
             subprocess.check_call([NETWORKD_WAIT_ONLINE, '--interface',
@@ -618,7 +621,7 @@ Address=10.241.3.2/24
 DNS=10.241.3.1
 Domains= ~company ~lab''')
 
-        subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
+        self.start_unit('systemd-networkd')
         subprocess.check_call([NETWORKD_WAIT_ONLINE, '--interface', self.iface,
                                '--interface=testvpnclient', '--timeout=20'])
 
@@ -888,7 +891,7 @@ Address=192.168.42.100
 DNS=192.168.42.1
 Domains= one two three four five six seven eight nine ten''')
 
-        subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
+        self.start_unit('systemd-networkd')
 
         for timeout in range(50):
             with open(RESOLV_CONF) as f:
@@ -920,7 +923,7 @@ Address=192.168.42.100
 DNS=192.168.42.1
 Domains={p}0 {p}1 {p}2 {p}3 {p}4'''.format(p=name_prefix))
 
-        subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
+        self.start_unit('systemd-networkd')
 
         for timeout in range(50):
             with open(RESOLV_CONF) as f:
@@ -950,7 +953,8 @@ DNS=192.168.42.1''')
 [Network]
 DNS=127.0.0.1''')
 
-        subprocess.check_call(['systemctl', 'start', 'systemd-resolved', 'systemd-networkd'])
+        self.start_unit('systemd-resolved')
+        self.start_unit('systemd-networkd')
 
         for timeout in range(50):
             with open(RESOLV_CONF) as f: