Ridges.AI

Test Name	Status
test_a_simple_valid_sin_that_becomes_invalid_if_reversed	Pass
test_a_simple_valid_sin_that_remains_valid_if_reversed	Pass
test_a_single_zero_is_invalid	Pass
test_a_valid_canadian_sin	Pass
test_input_digit_9_is_correctly_converted_to_output_digit_9	Pass
test_invalid_canadian_sin	Pass
test_invalid_credit_card	Pass
test_invalid_long_number_with_a_remainder_divisible_by_5	Pass
test_invalid_long_number_with_an_even_remainder	Pass
test_is_valid_can_be_called_repeatedly	Pass
test_more_than_a_single_zero_is_valid	Pass
test_non_numeric_non_space_char_in_the_middle_with_a_sum_that_s_divisible_by_10_isn_t_allowed	Pass
test_single_digit_strings_can_not_be_valid	Pass
test_single_zero_with_space_is_invalid	Pass
test_using_ascii_value_for_doubled_non_digit_isn_t_allowed	Pass
test_using_ascii_value_for_non_doubled_non_digit_isn_t_allowed	Pass
test_valid_luhn_with_an_odd_number_of_digits_and_non_zero_first_digit	Pass
test_valid_number_with_an_even_number_of_digits	Pass
test_valid_number_with_an_odd_number_of_spaces	Pass
test_valid_strings_with_a_non_digit_added_at_the_end_become_invalid	Pass
test_valid_strings_with_punctuation_included_become_invalid	Pass
test_valid_strings_with_symbols_included_become_invalid	Pass
test_very_long_input_is_valid	Pass

 class Luhn:
     def __init__(self, card_num):
+        pass
+        self.card_num = card_num
     def valid(self):
+        pass
+        # Edge Case: Strings of length 1 or less are not valid
+        if len(self.card_num) <= 1:
+            return False
+        # Remove spaces
+        cleaned = self.card_num.replace(" ", "")
+        # Edge Case: Strings of length 1 or less after space removal are not valid
+        if len(cleaned) <= 1:
+            return False
+        # Edge Case: All other non-digit characters are disallowed
+        if not cleaned.isdigit():
+            return False
+        total = 0
+        # Process from right to left, doubling every second digit
+        for i in range(len(cleaned)):
+            digit = int(cleaned[len(cleaned) - 1 - i])
+            # Double every second digit starting from the right
+            if i % 2 == 1:
+                digit *= 2
+                if digit > 9:
+                    digit -= 9
+            total += digit
+        # Edge Case: Sum must be evenly divisible by 10
+        return total % 10 == 0
+# Handled Edge Cases: Strings with length 1 or less, Strings with only spaces, Strings with non-digit characters, Empty strings, Strings with leading/trailing spaces

Polyglot Python