normalizers: Handle None properly in all normalizers

diff --git a/tasklib/task.py b/tasklib/task.py
index 7b512c5f88837603661c9b8220f880a45fefa356..789e4efd511359ab473d48ee96f0cc99ea8d63a3 100644 (file)
--- a/tasklib/task.py
+++ b/tasklib/task.py
@@ -103,6 +103,10 @@ class SerializingObject(object):
         or entered as a value of Task attribute.
         """
 
+        # None value should not be converted by normalizer
+        if value is None:
+            return None
+
         normalize_func = getattr(self, 'normalize_{0}'.format(key),
                                  lambda x: x)
 
@@ -233,7 +237,7 @@ class SerializingObject(object):
             # If the value is already localized, there is no need to change
             # time zone at this point. Also None is a valid value too.
             localized = value
-        
+
         return localized
 
     def normalize_uuid(self, value):

diff --git a/tasklib/tests.py b/tasklib/tests.py
index bc2885a1867175defe7c356201d5f6423ce734fe..5ebea1375aaeb682f845104f50f6d6fae369c449 100644 (file)
--- a/tasklib/tests.py
+++ b/tasklib/tests.py
@@ -502,12 +502,8 @@ class TaskTest(TasklibTest):
         # Test that any normalizer can handle None as a valid value
         t = Task(self.tw)
 
-        # These normalizers are not supposed to handle None
-        exempt_normalizers = ('normalize_uuid', )
-
         normalizers = [getattr(t, normalizer_name) for normalizer_name in
-                       filter(lambda x: x.startswith('normalize_'), dir(t))
-                       if normalizer_name not in exempt_normalizers]
+                       filter(lambda x: x.startswith('normalize_'), dir(t))]
 
         for normalizer in normalizers:
             normalizer(None)