#!/usr/bin/python3
import doctest
import socket
"""
This code uses the doctest module to test the functionality of a TCP server.
The tests simulate a server and clients connecting to the server, sending commands, and disconnecting.
The tests verify that the server assigns the correct ranks to the clients, distributes commands correctly
based on the clients' ranks, and re-adjusts the ranks correctly when a client disconnects.
Note that this is just an example and may not cover all edge cases and error handling scenarios.
"""


def test_tcp_server():
    """
    Test the TCP server's functionality to accept clients, assign ranks, and distribute commands.


    >>> server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    >>> server_socket.bind(("127.0.0.1", 46461))
    >>> server_socket.listen(3)

    >>> client_socket1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    >>> client_socket1.connect(("0.0.0.0", 12345))
    >>> client_socket1.send("0 Command 1\n".encode())
    >>> client_socket1.recv(1024).decode()
    'Accepted\n'

    >>> client_socket2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    >>> client_socket2.connect(("0.0.0.0", 12345))
    >>> client_socket2.send("0 Command 2\n".encode())
    >>> client_socket2.recv(1024).decode()
    'Rejected\n'

    >>> client_socket3 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    >>> client_socket3.connect(("0.0.0.0", 12345))
    >>> client_socket3.send("1 Command 3\n".encode())
    >>> client_socket3.recv(1024).decode()
    'Accepted\n'

    >>> client_socket1.close()

    >>> client_socket2.send("1 Command 4\n".encode())
    >>> client_socket2.recv(1024).decode()
    'Accepted\n'

    >>> client_socket3.send("2 Command 5\n".encode())
    >>> client_socket3.recv(1024).decode()
    'Rejected\n'

    >>> client_socket2.send("0 Command 6\n".encode())
    >>> client_socket2.recv(1024).decode()
    'Accepted\n'

    >>> client_socket2.close()
    >>> client_socket3.close()
    >>> server_socket.close()
    """


if __name__ == "__main__":
    doctest.testmod()
