def test_1_as_not_a_prime_number(self): self.assertIs(is_prime_number(1), False)
def test_19_as_a_prime_number(self): self.assertIs(is_prime_number(19), True)
def test_50_as_not_a_prime_number(self): self.assertIs(is_prime_number(50), False)
def test_3_as_a_prime_number(self): self.assertIs(is_prime_number(3), True)