import unittest

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def adult(self):
        return self.age >= 18
    
class TestPerson(unittest.TestCase):
    def test_if_adult(self):
        person1 = Person("Daniel", 24)
        person2 = Person("Wasilios", 21)
        person3 = Person("Goksis", 12)

        self.assertTrue(person1.adult())
        self.assertTrue(person2.adult())
        self.assertFalse(person3.adult())



if __name__ == "__main__":
    unittest.main()