D-Bus testing: let DBusUtil override unittest.TestCase methods

As in the CmdlineTest, all tests now look for methods in DBusUtil
first, which allows overriding unittest.TestCase methods in our
own code. Done for the sake of consistency (no immediate need).

test/test-dbus.py

@@ -1158,7 +1158,7 @@ status: idle, 0, {}
     if not 'assertNotIn' in dir(unittest.TestCase):
         assertNotIn = assertNotInCustom
 
-class TestDBusServer(unittest.TestCase, DBusUtil):
+class TestDBusServer(DBusUtil, unittest.TestCase):
     """Tests for the read-only Server API."""
 
     def setUp(self):
@@ -1224,7 +1224,7 @@ class TestDBusServer(unittest.TestCase, DBusUtil):
         else:
             self.fail("no exception thrown")
 
-class TestDBusServerTerm(unittest.TestCase, DBusUtil):
+class TestDBusServerTerm(DBusUtil, unittest.TestCase):
     def setUp(self):
         self.setUpServer()
 
@@ -1404,7 +1404,7 @@ class TestDBusServerTerm(unittest.TestCase, DBusUtil):
         self.assertFalse(self.isServerRunning())
 
 
-class TestNamedConfig(unittest.TestCase, DBusUtil):
+class TestNamedConfig(DBusUtil, unittest.TestCase):
     """Tests for Set/GetNamedConfig"""
 
     def setUp(self):
@@ -1455,7 +1455,7 @@ class TestNamedConfig(unittest.TestCase, DBusUtil):
         self.assertEqual(fooConfig, self.session.GetNamedConfig("foo", False))
         self.assertEqual(barConfig, self.session.GetNamedConfig("bar", False))
 
-class TestDBusServerPresence(unittest.TestCase, DBusUtil):
+class TestDBusServerPresence(DBusUtil, unittest.TestCase):
     """Tests Presence signal and checkPresence API"""
 
     # TODO: check auto sync + presence combination
@@ -1691,7 +1691,7 @@ class TestDBusServerPresence(unittest.TestCase, DBusUtil):
     def run(self, result):
         self.runTest(result, True)
 
-class TestDBusSession(unittest.TestCase, DBusUtil):
+class TestDBusSession(DBusUtil, unittest.TestCase):
     """Tests that work with an active session."""
 
     def setUp(self):
@@ -1818,7 +1818,7 @@ class TestDBusSession(unittest.TestCase, DBusUtil):
         finally:
             self.removeTimeout(t1)
 
-class TestSessionAPIsEmptyName(unittest.TestCase, DBusUtil):
+class TestSessionAPIsEmptyName(DBusUtil, unittest.TestCase):
     """Test session APIs that work with an empty server name. Thus, all of session APIs which
        need this kind of checking are put in this class. """
 
@@ -1883,7 +1883,7 @@ class TestSessionAPIsEmptyName(unittest.TestCase, DBusUtil):
         self.assertTrue(reports[0]["dir"].endswith("dummy_+test@context-2010-01-20-10-10"))
 
 
-class TestSessionAPIsDummy(unittest.TestCase, DBusUtil):
+class TestSessionAPIsDummy(DBusUtil, unittest.TestCase):
     """Tests that work for GetConfig/SetConfig/CheckSource/GetDatabases/GetReports in Session.
        This class is only working in a dummy config. Thus it can't do sync correctly. The purpose
        is to test some cleanup cases and expected errors. Also, some unit tests for some APIs 
@@ -2772,7 +2772,7 @@ class TestSessionAPIsDummy(unittest.TestCase, DBusUtil):
         self.runTestDBusCheck = checkDBusLog
 
 
-class TestSessionAPIsReal(unittest.TestCase, DBusUtil):
+class TestSessionAPIsReal(DBusUtil, unittest.TestCase):
     """ This class is used to test those unit tests of session APIs, depending on doing sync.
         Thus we need a real server configuration to confirm sync could be run successfully.
         Typically we need make sure that at least one sync has been done before testing our
@@ -2877,7 +2877,7 @@ class TestSessionAPIsReal(unittest.TestCase, DBusUtil):
                                                     "session " + sessionpath2 + " ready"])
         session2.Detach()
 
-class TestDBusSyncError(unittest.TestCase, DBusUtil):
+class TestDBusSyncError(DBusUtil, unittest.TestCase):
     def setUp(self):
         self.setUpServer()
         self.setUpSession(configName)
@@ -2895,7 +2895,7 @@ class TestDBusSyncError(unittest.TestCase, DBusUtil):
         self.assertEqual(status, "done")
         self.assertEqual(error, 10500)
 
-class TestConnection(unittest.TestCase, DBusUtil):
+class TestConnection(DBusUtil, unittest.TestCase):
     """Tests Server.Connect(). Tests depend on getting one Abort signal to terminate."""
 
     """a real message sent to our own server, DevInf stripped, username/password foo/bar"""