def test_prime_numbers_in_range_returns_emptylist_if_arg_is_unity(self):
self.assertEqual("argument must be an integer greater than 2", prime_numbers_in_range(1),
msg='should return error message if input value is 1')
def test_prime_numbers_in_range_returns_output_of_type_list_if_arg_isvalid(self):
self.assertIsInstance(prime_numbers_in_range(10), list,
msg='Invalid output type. Should be a list')
def test_prime_numbers_in_range_returns_emptylist_for_negative_arg(self):
self.assertEqual("argument must be an integer greater than 2", prime_numbers_in_range(-10),
msg='Should return error message if argument is negative')
def test_prime_numbers_in_range_returns_list_if_arg_is_ten(self):
self.assertEqual([2,3,5,7], prime_numbers_in_range(10),
msg='Output must be list of prime numbers')