def test_extra_arguments(self):
"""Pass extra arguments"""
with self.assertRaises(TypeError):
base.Base(12, 12)
with self.assertRaises(TypeError):
base.Base("hello", 12, 34)
def test_id_set(self):
""" id can be set on instantiation
"""
b1 = base.Base()
b2 = base.Base(5)
b3 = base.Base()
self.assertEqual(b1.id, 1)
self.assertEqual(b2.id, 5)
self.assertEqual(b3.id, 2)
def test_instance_counter(self):
"""should keep track of number of instances as id
"""
b1 = base.Base()
start = b1.id
b2 = base.Base()
b3 = base.Base()
b4 = base.Base()
b5 = base.Base()
self.assertEqual(b2.id, start + 1)
self.assertEqual(b3.id, start + 2)
self.assertEqual(b5.id, start + 4)
def test_inherits(self):
"""test if Rectangle inherits from Base"""
b = base.Base()
rect = rectangle.Rectangle(1, 1)
self.assertTrue(issubclass(type(rect), type(b)))
def test_class_attributes(self):
"""Check class attributes"""
b = base.Base(1001)
with self.assertRaises(AttributeError):
print(b.nb_objects)
with self.assertRaises(AttributeError):
print(b.__nb_objects)
def test_generate_multiple_bases(self):
"""Create multiple instances"""
b1 = base.Base()
self.assertEqual(b1.id, 1)
b2 = base.Base()
self.assertEqual(b2.id, 2)
b3 = base.Base()
self.assertEqual(b3.id, 3)
b4 = base.Base(12)
self.assertEqual(b4.id, 12)
b5 = base.Base()
self.assertEqual(b5.id, 4)
nb_objects = 4
for i in range(5, 10):
# id_base is i if i is even, otherwise None
id_base = i if i % 2 == 0 else None
with self.subTest(i=i):
b = base.Base(id_base)
if i % 2 != 0:
nb_objects += 1
id_base = nb_objects
self.assertIs(b.id, id_base)
def test_dictionary(self):
"""Test dictionary"""
b = base.Base(12)
def test_attribute_not_exists(self):
"""Get an attribute that doesn't exists"""
b = base.Base(14)
with self.assertRaises(AttributeError):
print(b.size)
def test_get_id(self):
"""Get the id of an instance"""
b = base.Base(12)
self.assertIs(b.id, 12)