Added unit tests for packets.

Also did some code cleanup.

tests/plugins/test_ping.py

@@ -7,12 +7,11 @@ from aprsd.plugins import ping as ping_plugin
 
 from .. import fake, test_plugin
 
-
 CONF = cfg.CONF
 
 
 class TestPingPlugin(test_plugin.TestPlugin):
-    @mock.patch("time.localtime")
+    @mock.patch('time.localtime')
     def test_ping(self, mock_time):
         fake_time = mock.MagicMock()
         h = fake_time.tm_hour = 16
@@ -24,7 +23,7 @@ class TestPingPlugin(test_plugin.TestPlugin):
         ping = ping_plugin.PingPlugin()
 
         packet = fake.fake_packet(
-            message="location",
+            message='location',
             msg_number=1,
         )
 
@@ -33,16 +32,16 @@ class TestPingPlugin(test_plugin.TestPlugin):
 
         def ping_str(h, m, s):
             return (
-                "Pong! "
+                'Pong! '
                 + str(h).zfill(2)
-                + ":"
+                + ':'
                 + str(m).zfill(2)
-                + ":"
+                + ':'
                 + str(s).zfill(2)
             )
 
         packet = fake.fake_packet(
-            message="Ping",
+            message='Ping',
             msg_number=1,
         )
         actual = ping.filter(packet)
@@ -50,7 +49,7 @@ class TestPingPlugin(test_plugin.TestPlugin):
         self.assertEqual(expected, actual)
 
         packet = fake.fake_packet(
-            message="ping",
+            message='ping',
             msg_number=1,
         )
         actual = ping.filter(packet)