Sum of two numbers

Write a function that receives two numbers and returns their sum. Example:

sum_of_two_numbers(2, 3) == 5
sum_of_two_numbers(7, 1) == 8
import unittest


class AddTwoNumberTest(unittest.TestCase):
    def test_add_two_numbers(self):
        self.assertEqual(sum_of_two_numbers(1, 2), 3)
        self.assertEqual(sum_of_two_numbers(8, 80), 88)