"""
Tests for the parts of jsonschema related to the :validator:`format` property.
"""
from jsonschema.tests.compat import mock, unittest
from jsonschema import FormatError, ValidationError, FormatChecker
from jsonschema.validators import Draft4Validator
class TestFormatChecker(unittest.TestCase):
def setUp(self):
self.fn = mock.Mock()
def test_it_can_validate_no_formats(self):
checker = FormatChecker(formats=())
self.assertFalse(checker.checkers)
def test_it_raises_a_key_error_for_unknown_formats(self):
with self.assertRaises(KeyError):
FormatChecker(formats=["o noes"])
def test_it_can_register_cls_checkers(self):
with mock.patch.dict(FormatChecker.checkers, clear=True):
FormatChecker.cls_checks("new")(self.fn)
self.assertEqual(FormatChecker.checkers, {"new": (self.fn, ())})
def test_it_can_register_checkers(self):
checker = FormatChecker()
checker.checks("new")(self.fn)
self.assertEqual(
checker.checkers,
dict(FormatChecker.checkers, new=(self.fn, ()))
)
def test_it_catches_registered_errors(self):
checker = FormatChecker()
cause = self.fn.side_effect = ValueError()
checker.checks("foo", raises=ValueError)(self.fn)
with self.assertRaises(FormatError) as cm:
checker.check("bar", "foo")
self.assertIs(cm.exception.cause, cause)
self.assertIs(cm.exception.__cause__, cause)
# Unregistered errors should not be caught
self.fn.side_effect = AttributeError
with self.assertRaises(AttributeError):
checker.check("bar", "foo")
def test_format_error_causes_become_validation_error_causes(self):
checker = FormatChecker()
checker.checks("foo", raises=ValueError)(self.fn)
cause = self.fn.side_effect = ValueError()
validator = Draft4Validator({"format": "foo"}, format_checker=checker)
with self.assertRaises(ValidationError) as cm:
validator.validate("bar")
self.assertIs(cm.exception.__cause__, cause)
