Fixes NOBankAccountNumber issue with formatting

If you would input accounts that were too short or otherwise riddled
with spaces and periods, it would not remove these before showing them
again.
Fixes the issue and adds a couple of assertions.

Author: thor

docs/changelog.rst

@@ -4,6 +4,11 @@ Changelog
 1.5.3   (unreleased)
 --------------------
 
+Modifications to existing flavors:
+
+- Fixes issue with `no.forms.NOBankAccountNumber` unclean data.
+  (`gh-311 <https://github.com/django/django-localflavor/pull/311>`_).
+
 Other changes:
 
 - None

localflavor/no/forms.py

@@ -160,6 +160,7 @@ def to_python(self, value):
         return value.replace('.', '').replace(' ', '')
 
     def prepare_value(self, value):
+        value = self.to_python(value)
         if value in self.empty_values:
             return self.empty_value
         return '{}.{}.{}'.format(value[0:4], value[4:6], value[6:11])

tests/test_no.py

@@ -67,6 +67,9 @@ def test_NOBankAccountNumber(self):
     def test_NOBankAccountNumber_formatting(self):
         form = NOBankAccountNumber()
         self.assertEqual(form.prepare_value('76940512057'), '7694.05.12057')
+        self.assertEqual(form.prepare_value(' 7694 05 12057 '), '7694.05.12057')
+        self.assertEqual(form.prepare_value('7694. 05.1205'), '7694.05.1205')
+        self.assertEqual(form.prepare_value('7694.05.120.5'), '7694.05.1205')
         # In the event there's already empty/blank/null values present.
         # Any invalid data should be stopped by form.validate, which the above test should take care of.
         self.assertEqual(form.prepare_value(None), '')