Corrected some issues with the backport from [14627].

from unittest import TestCase

from django.core.exceptions import ValidationError

from django.core.validators import EMPTY_VALUES

from django.utils.unittest import TestCase

class LocalFlavorTestCase(TestCase):

            self.assertEqual(optional.clean(input), output)

        # test invalid inputs

        for input, errors in invalid.items():

            self.assertRaisesRegexp(ValidationError, unicode(errors),

                required.clean, input

            )

            self.assertRaisesRegexp(ValidationError, unicode(errors),

                optional.clean, input

            )

            try:

                required.clean(input)

            except ValidationError, e:

                self.assertTrue(unicode(errors) in unicode(e))

            else:

                self.fail()

            try:

                optional.clean(input)

            except ValidationError, e:

                self.assertTrue(unicode(errors) in unicode(e))

            else:

                self.fail()

        # test required inputs

        error_required = u'This field is required'

        for e in EMPTY_VALUES:

            self.assertRaisesRegexp(ValidationError, error_required,

                required.clean, e

            )

            self.assertEqual(optional.clean(e), u'')

        for val in EMPTY_VALUES:

            try:

                required.clean(val)

            except ValidationError, e:

                self.assertTrue(error_required in unicode(e))

            else:

                self.fail()

            self.assertEqual(optional.clean(val), u'')