dirname and filename renamed to a_dir and a_file

Change-Id: I00f17985e6730290d76e56cb30d51bfc9b5dbfad
diff --git a/test_rsync_url.py b/test_rsync_url.py
index 170f714..0eecbf4 100644
--- a/test_rsync_url.py
+++ b/test_rsync_url.py
@@ -71,13 +71,13 @@
             logger.info('par = "{}", er = "{}"'.format(par, er))
             self.assertEqual(url.urljoin(par), er)
 
-    def dirname(self, remote, expected_result):
+    def a_dir(self, remote, expected_result):
         logger.info('For "{}" should be {}'.format(remote, expected_result))
         url = rsync_url.RsyncUrl(remote)
         self.log_locals(url)
         for par, er in expected_result.items():
             logger.info('par = "{}", er = "{}"'.format(par, er))
-            self.assertEqual(url.dirname(par), er)
+            self.assertEqual(url.a_dir(par), er)
 
     def url_in(self, remote, expected_result):
         logger.info('For "{}" should be {}'.format(remote, expected_result))
@@ -87,13 +87,13 @@
             logger.info('par = "{}", er = "{}"'.format(par, er))
             self.assertEqual(url.url_in(par), er)
 
-    def filename(self, remote, expected_result):
+    def a_file(self, remote, expected_result):
         logger.info('For "{}" should be {}'.format(remote, expected_result))
         url = rsync_url.RsyncUrl(remote)
         self.log_locals(url)
         for par, er in expected_result.items():
             logger.info('par = "{}", er = "{}"'.format(par, er))
-            self.assertEqual(url.filename(par), er)
+            self.assertEqual(url.a_file(par), er)
 
     def url_is(self, remote, expected_result):
         logger.info('For "{}" should be {}'.format(remote, expected_result))