def test_for_zero(self):
num1 = 0
num2 = 0
self.assertTrue(last_digit(num1, num2))
def test_for_large_values(self):
num1 = 81238791989
num2 = 1239898239
self.assertTrue(last_digit(num1, num2))
def test_for_same_last_single_and_double(self):
num1 = 6
num2 = 86
self.assertTrue(last_digit(num1, num2))
def test_for_different_single_and_double(self):
num1 = 51
num2 = 9
self.assertFalse(last_digit(num1, num2))
def test_for_nonzero_and_zero_last(self):
num1 = 15
num2 = 0
self.assertFalse(last_digit(num1, num2))