add tests for enigma_machine (#10017)

* add tests for enigma_machine

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* typo

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* updating DIRECTORY.md

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: pre-commit-ci[bot] <pre-commit-ci[bot]@users.noreply.github.com>

Author: 3 people

DIRECTORY.md

@@ -357,6 +357,7 @@
     * [Middle Element Of Linked List](data_structures/linked_list/middle_element_of_linked_list.py)
     * [Partition Linked List](data_structures/linked_list/partition_linked_list.py)
     * [Print Reverse](data_structures/linked_list/print_reverse.py)
+    * [Remove Nth Node From End Of List](data_structures/linked_list/remove_nth_node_from_end_of_list.py)
     * [Reverse K Group](data_structures/linked_list/reverse_k_group.py)
     * [Rotate To The Right](data_structures/linked_list/rotate_to_the_right.py)
     * [Singly Linked List](data_structures/linked_list/singly_linked_list.py)
@@ -385,6 +386,7 @@
     * [Postfix Evaluation](data_structures/stacks/postfix_evaluation.py)
     * [Prefix Evaluation](data_structures/stacks/prefix_evaluation.py)
     * [Stack](data_structures/stacks/stack.py)
+    * [Stack Tracking Min Max](data_structures/stacks/stack_tracking_min_max.py)
     * [Stack Using Two Queues](data_structures/stacks/stack_using_two_queues.py)
     * [Stack With Doubly Linked List](data_structures/stacks/stack_with_doubly_linked_list.py)
     * [Stack With Singly Linked List](data_structures/stacks/stack_with_singly_linked_list.py)
@@ -939,6 +941,7 @@
     * [Catalan Number](maths/special_numbers/catalan_number.py)
     * [Deficient Numbers](maths/special_numbers/deficient_numbers.py)
     * [Disarum Number](maths/special_numbers/disarum_number.py)
+    * [Evil Number](maths/special_numbers/evil_number.py)
     * [Hamming Numbers](maths/special_numbers/hamming_numbers.py)
     * [Happy Number](maths/special_numbers/happy_number.py)
     * [Harshad Numbers](maths/special_numbers/harshad_numbers.py)

hashes/enigma_machine.py

@@ -1,3 +1,10 @@
+"""
+
+Note:
+    This algorithm has memory persistence.
+    So multiple runs on the same runtime will carry junk and scramble the result!
+"""
+
 alphabets = [chr(i) for i in range(32, 126)]
 gear_one = list(range(len(alphabets)))
 gear_two = list(range(len(alphabets)))
@@ -40,7 +47,22 @@ def engine(input_character) -> None:
     rotator()
 
 
-if __name__ == "__main__":
+def encode_or_decode(message, token):
+    """
+
+    >>> encode_or_decode("hello", 3)
+    (['/', '0', "'", '%', ' '], 3)
+
+    """
+
+    for _ in range(token):
+        rotator()
+    for j in message:
+        engine(j)
+    return code, token
+
+
+def menu():
     decode = list(input("Type your message:\n"))
     while True:
         try:
@@ -57,3 +79,9 @@ def engine(input_character) -> None:
         f"\nYour Token is {token} please write it down.\nIf you want to decode "
         "this message again you should input same digits as token!"
     )
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()