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"""
Tests for the parts of jsonschema related to the :validator:`format` property.
"""
from unittest import TestCase
from jsonschema import FormatError, ValidationError, FormatChecker
from jsonschema.validators import Draft4Validator
BOOM = ValueError("Boom!")
BANG = ZeroDivisionError("Bang!")
def boom(thing):
if thing == "bang":
raise BANG
raise BOOM
class TestFormatChecker(TestCase):
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):
original = dict(FormatChecker.checkers)
self.addCleanup(FormatChecker.checkers.pop, "boom")
FormatChecker.cls_checks("boom")(boom)
self.assertEqual(
FormatChecker.checkers,
dict(original, boom=(boom, ())),
)
def test_it_can_register_checkers(self):
checker = FormatChecker()
checker.checks("boom")(boom)
self.assertEqual(
checker.checkers,
dict(FormatChecker.checkers, boom=(boom, ()))
)
def test_it_catches_registered_errors(self):
checker = FormatChecker()
checker.checks("boom", raises=type(BOOM))(boom)
with self.assertRaises(FormatError) as cm:
checker.check(instance=12, format="boom")
self.assertIs(cm.exception.cause, BOOM)
self.assertIs(cm.exception.__cause__, BOOM)
# Unregistered errors should not be caught
with self.assertRaises(type(BANG)):
checker.check(instance="bang", format="boom")
def test_format_error_causes_become_validation_error_causes(self):
checker = FormatChecker()
checker.checks("boom", raises=ValueError)(boom)
validator = Draft4Validator({"format": "boom"}, format_checker=checker)
with self.assertRaises(ValidationError) as cm:
validator.validate("BOOM")
self.assertIs(cm.exception.cause, BOOM)
self.assertIs(cm.exception.__cause__, BOOM)
def test_format_checkers_come_with_defaults(self):
# This is bad :/ but relied upon.
# The docs for quite awhile recommended people do things like
# validate(..., format_checker=FormatChecker())
# We should change that, but we can't without deprecation...
checker = FormatChecker()
with self.assertRaises(FormatError):
checker.check(instance="not-an-ipv4", format="ipv4")
def test_repr(self):
checker = FormatChecker(formats=())
checker.checks("foo")(lambda thing: True)
checker.checks("bar")(lambda thing: True)
checker.checks("baz")(lambda thing: True)
self.assertEqual(
repr(checker),
"<FormatChecker checkers=['bar', 'baz', 'foo']>",
)
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