def test_instantiation(self):
"""Test proper instantiation of object 'User()'"""
ci = City()
self.assertIsInstance(ci, City)
self.assertIsInstance(ci.id, str)
self.assertIsInstance(ci.created_at, datetime.datetime)
self.assertIsInstance(ci.updated_at, datetime.datetime)
self.assertIsInstance(ci.__class__, type)
ci.size = "tall"
l1 = dir(ci)
self.assertIn('size', l1)
self.assertEqual(ci.__dict__['size'], 'tall')
ci.size = 'tall'
l2 = dir(ci)
self.assertIn('size', l2)
self.assertEqual(ci.__dict__['size'], 'tall')
ci.age = 28
l3 = dir(ci)
self.assertIn('age', l3)
self.assertEqual(ci.__dict__['age'], 28)
ci.age = 28.5
l4 = dir(ci)
self.assertIn('age', l4)
self.assertEqual(ci.__dict__['age'], 28.5)
ci.age = None
l5 = dir(ci)
self.assertIn('age', l5)
self.assertEqual(ci.__dict__['age'], None)
ci_kw1 = City(**{})
self.assertIsInstance(ci_kw1, City)
self.assertIsInstance(ci_kw1.id, str)
self.assertIsInstance(ci_kw1.created_at, datetime.datetime)
self.assertIsInstance(ci_kw1.updated_at, datetime.datetime)
self.assertIsInstance(ci_kw1.__class__, type)
ci_kw2 = City(**{"first_name": "John", "age": 25})
l6 = dir(ci_kw2)
self.assertIn('first_name', l6)
self.assertIn('age', l6)
self.assertEqual(ci_kw2.__dict__['first_name'], 'John')
self.assertEqual(ci_kw2.__dict__['age'], 25)
def test_to_dict(self):
"""Test to_dict method"""
ci = City()
ci.age = 28
ci.size = "tall"
for k, v in ci.__dict__.items():
if k != 'updated_at' and k != 'created_at':
self.assertIn(k, ci.to_dict())
self.assertEqual(v, ci.to_dict()[k])
self.assertEqual(ci.to_dict()['__class__'], ci.__class__.__name__)
self.assertEqual(ci.to_dict()['updated_at'], ci.updated_at.isoformat())
self.assertEqual(ci.to_dict()['created_at'], ci.created_at.isoformat())
self.assertEqual(ci.to_dict()['age'], 28)
self.assertEqual(ci.to_dict()['size'], 'tall')
self.assertIsInstance(ci.to_dict(), dict)
