Added length property and TestCase.

iptcmessage.py

@@ -4,6 +4,7 @@
 class IPTCMessage(object):
     def __init__(self, raw):
         self.raw = raw
+        self.length = len(self.raw)
         print("Message: %s" % repr(self.raw))
 
 if __name__=='__main__':

iptcmessageTest.py

@@ -0,0 +1,14 @@
+#!/bin/env python3
+# -*- coding: utf-8 -*-
+
+import iptcmessage
+import unittest
+
+class IPTCMessageTestCase(unittest.TestCase):
+
+    def testMessageParsing(self):
+        iptc = iptcmessage.IPTCMessage("")
+        self.assertGreater(iptc.length, 0)
+
+if __name__=='__main__':
+    unittest.main()