--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/regressiontests/forms/localflavor/utils.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,51 @@
+from unittest import TestCase
+
+from django.core.exceptions import ValidationError
+from django.core.validators import EMPTY_VALUES
+
+
+class LocalFlavorTestCase(TestCase):
+    def assertFieldOutput(self, fieldclass, valid, invalid, field_args=[],
+        field_kwargs={}, empty_value=u''):
+        """Asserts that a field behaves correctly with various inputs.
+
+        Args:
+            fieldclass: the class of the field to be tested.
+            valid: a dictionary mapping valid inputs to their expected
+                    cleaned values.
+            invalid: a dictionary mapping invalid inputs to one or more
+                    raised error messages.
+            fieldargs: the args passed to instantiate the field
+            fieldkwargs: the kwargs passed to instantiate the field
+            emptyvalue: the expected clean output for inputs in EMPTY_VALUES
+        """
+        required = fieldclass(*field_args, **field_kwargs)
+        optional = fieldclass(*field_args, **dict(field_kwargs, required=False))
+        # test valid inputs
+        for input, output in valid.items():
+            self.assertEqual(required.clean(input), output)
+            self.assertEqual(optional.clean(input), output)
+        # test invalid inputs
+        for input, errors in invalid.items():
+            try:
+                required.clean(input)
+            except ValidationError, e:
+                self.assertEqual(errors, e.messages)
+            else:
+                self.fail()
+            try:
+                optional.clean(input)
+            except ValidationError, e:
+                self.assertEqual(errors, e.messages)
+            else:
+                self.fail()
+        # test required inputs
+        error_required = [u'This field is required.']
+        for val in EMPTY_VALUES:
+            try:
+                required.clean(val)
+            except ValidationError, e:
+                self.assertEqual(error_required, e.messages)
+            else:
+                self.fail()
+            self.assertEqual(optional.clean(val), empty_value)