Added tests for exifHeader module. The reveal function of the exifHeader module now returns the result instead of simply printing the clear message.

stegano/exifHeader.py

@@ -21,7 +21,7 @@
 
 __author__ = "Cedric Bonhomme"
 __version__ = "$Revision: 0.2 $"
-__date__ = "$Date: 2016/04/17 $"
+__date__ = "$Date: 2016/05/17 $"
 __license__ = "GPLv3"
 
 # Thanks to: http://www.julesberman.info/spec2img.htm
@@ -40,13 +40,10 @@ def hide(img, img_enc, copyright="https://github.com/cedricbonhomme/Stegano", \
     if secret_file != None:
         with open(secret_file, "r") as f:
             secret_file_content = f.read()
-    text = "\nImage annotation date: "
-    text = text + str(datetime.date.today())
-    text = text  + "\nImage description:\n"
     if secret_file != None:
-        text = compress(b64encode(text + secret_file_content))
+        text = compress(b64encode(secret_file_content))
     else:
-        text = compress(b64encode(text + secret_message))
+        text = compress(b64encode(secret_message))
 
     try:
         shutil.copy(img, img_enc)
@@ -73,9 +70,10 @@ def reveal(img):
     except:
         print("Impossible to read description.")
         return
-    print((b64decode(decompress(g.imageDescription()))))
-    print(("\nCopyright " + g.copyright()))
-    #print g.dateTimeOriginal()s
+    return b64decode(decompress(g.imageDescription()))
+    #print((b64decode(decompress(g.imageDescription()))))
+    #print(("\nCopyright " + g.copyright()))
+    #print g.dateTimeOriginal()
 
 
 if __name__ == "__main__":

tests/test_exifHeader.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+#-*- coding: utf-8 -*-
+
+# Stéganô - Stéganô is a basic Python Steganography module.
+# Copyright (C) 2010-2016  Cédric Bonhomme - https://www.cedricbonhomme.org
+#
+# For more information : https://github.com/cedricbonhomme/Stegano
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>
+
+__author__ = "Cedric Bonhomme"
+__version__ = "$Revision: 0.1 $"
+__date__ = "$Date: 2016/05/17 $"
+__license__ = "GPLv3"
+
+import os
+import unittest
+
+from stegano import exifHeader
+
+class TestEXIFHeader(unittest.TestCase):
+
+    def test_hide_empty_message(self):
+        """
+        Test hiding the empty string.
+        """
+        secret = exifHeader.hide("./examples/pictures/Elisha-Cuthbert.jpg",
+                                "./image.png", copyright="", secret_message="")
+        #secret.save(""./image.png"")
+
+        clear_message = exifHeader.reveal("./image.png")
+        #print(clear_message)
+        self.assertEqual("", clear_message)
+
+    def test_hide_and_reveal(self):
+        messages_to_hide = ["a", "foo", "Hello World!", ":Python:"]
+
+        for message in messages_to_hide:
+            secret = exifHeader.hide("./examples/pictures/Elisha-Cuthbert.jpg",
+                                    "./image.png", copyright="",
+                                    secret_message=message)
+
+            clear_message = exifHeader.reveal("./image.png")
+
+            self.assertEqual(message, clear_message)
+
+    def tearDown(self):
+        try:
+            os.unlink("./image.png")
+        except:
+            pass
+
+
+if __name__ == '__main__':
+    unittest.main()