def test_invalid_type(self):
"""
Initializing the Identity object with an invalid type that can’t be JSON should
raise a TypeError.
"""
with self.assertRaises(TypeError):
from_json(["not", "a", "string"])
def test_invalid_value(self):
"""
Initializing the Identity object with an invalid JSON string should raise a
ValueError.
"""
with self.assertRaises(ValueError):
from_json("invalid JSON")
def test_invalid_format(self):
"""
Initializing the Identity object with a JSON string that is not
formatted correctly.
"""
identity = self._identity()
dict_ = identity._asdict()
json = dumps(dict_)
with self.assertRaises(KeyError):
from_json(json)
def test_valid(self):
"""
Initialize the Identity object with a valid JSON string.
"""
identity = self._identity()
dict_ = {"identity": identity._asdict()}
json = dumps(dict_)
try:
self.assertEqual(identity, from_json(json))
except (TypeError, ValueError):
self.fail()