django/tests/regressiontests/forms/localflavor/utils.py

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from django.core.exceptions import ValidationError
from django.core.validators import EMPTY_VALUES
from django.forms.fields import CharField
from django.test.utils import get_warnings_state, restore_warnings_state
from django.utils.unittest import TestCase
class LocalFlavorTestCase(TestCase):
# NOTE: These are copied from the TestCase Django uses for tests which
# access the database
def save_warnings_state(self):
self._warnings_state = get_warnings_state()
def restore_warnings_state(self):
restore_warnings_state(self._warnings_state)
def assertFieldOutput(self, fieldclass, valid, invalid, field_args=None,
field_kwargs=None, 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.
field_args: the args passed to instantiate the field
field_kwargs: the kwargs passed to instantiate the field
empty_value: the expected clean output for inputs in EMPTY_VALUES
"""
if field_args is None:
field_args = []
if field_kwargs is None:
field_kwargs = {}
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():
self.assertRaisesRegexp(ValidationError, unicode(errors),
required.clean, input
)
self.assertRaisesRegexp(ValidationError, unicode(errors),
optional.clean, input
)
# 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), empty_value)
# test that max_length and min_length are always accepted
if issubclass(fieldclass, CharField):
field_kwargs.update({'min_length':2, 'max_length':20})
self.assertTrue(isinstance(fieldclass(*field_args, **field_kwargs), fieldclass))