draft some unittesting for Crypography module

tests/crypto_tests.py

@@ -0,0 +1,32 @@
+import pwman.util.config as config
+import pwman.data.factory
+from pwman.data.nodes import NewNode
+from pwman.data.tags import Tag
+
+# set cls_timout to negative number (e.g. -1) to disable
+default_config = {'Global': {'umask': '0100', 'colors': 'yes',
+                             'cls_timeout': '5'
+                             },
+                  'Database': {'type': 'SQLite',
+                               'filename': os.path.join("tests", "pwman.db")},
+                  'Encryption': {'algorithm': 'AES'},
+                  'Readline': {'history': os.path.join("tests",
+                                                       "history")}
+                  }
+
+config.set_defaults(default_config)
+import unittest
+
+
+class CryptoTest(unittest.TestCase):
+
+    def test_no_algorithm(self):
+        # TODO: set config to no algorithm
+        # check that the proper exception is raised
+        self.assertRaises()
+
+        # TODO: write a white box test for each
+        #       method in CryptoEngine
+
+
+