Fixed #14860 -- PLPESELField, PLNIPField, and PLREGONField didn't han…

…dle all EMPTY_VALUES correctly. Also converted teh Polish localflavor doctests into unittests. We have always been at war with doctests. Thanks to Idan Gazit.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14949 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/localflavor/pl/forms.py

@@ -7,6 +7,7 @@
 from django.forms import ValidationError
 from django.forms.fields import Select, RegexField
 from django.utils.translation import ugettext_lazy as _
+from django.core.validators import EMPTY_VALUES
 
 class PLProvinceSelect(Select):
     """
@@ -45,6 +46,8 @@ def __init__(self, *args, **kwargs):
 
     def clean(self,value):
         super(PLPESELField, self).clean(value)
+        if value in EMPTY_VALUES:
+            return u''
         if not self.has_valid_checksum(value):
             raise ValidationError(self.error_messages['checksum'])
         return u'%s' % value
@@ -78,6 +81,8 @@ def __init__(self, *args, **kwargs):
 
     def clean(self,value):
         super(PLNIPField, self).clean(value)
+        if value in EMPTY_VALUES:
+            return u''
         value = re.sub("[-]", "", value)
         if not self.has_valid_checksum(value):
             raise ValidationError(self.error_messages['checksum'])
@@ -116,6 +121,8 @@ def __init__(self, *args, **kwargs):
 
     def clean(self,value):
         super(PLREGONField, self).clean(value)
+        if value in EMPTY_VALUES:
+            return u''
         if not self.has_valid_checksum(value):
             raise ValidationError(self.error_messages['checksum'])
         return u'%s' % value