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mock socket python

Xabos answered on June 4, 2024 Popularity 1/10 Helpfulness 1/10

answer mock socket python

mock socket python

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Example of Mocking a Socket
Server Code:

import socket

def echo_server(host, port):
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as server_socket:
        server_socket.bind((host, port))
        server_socket.listen()
        conn, addr = server_socket.accept()
        with conn:
            print('Connected by', addr)
            while True:
                data = conn.recv(1024)
                if not data:
                    break
                conn.sendall(data)
                
Mocking the Server for Testing:
  
import unittest
from unittest.mock import patch, MagicMock

class TestEchoServer(unittest.TestCase):
    @patch('socket.socket')
    def test_echo_server(self, mock_socket):
        # Create a mock socket instance
        mock_conn = MagicMock()
        mock_socket_instance = MagicMock()
        mock_socket_instance.accept.return_value = (mock_conn, ('127.0.0.1', 12345))
        mock_socket.return_value = mock_socket_instance

        # Simulate the data to be received
        mock_conn.recv.side_effect = [b'Hello', b'', b'']
        
        # Call the function to be tested
        echo_server('localhost', 12345)
        
        # Assertions to check if the data was sent back correctly
        mock_conn.sendall.assert_called_with(b'Hello')

if __name__ == '__main__':
    unittest.main()
    
Mocking a Client:
  
def echo_client(host, port, message):
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as client_socket:
        client_socket.connect((host, port))
        client_socket.sendall(message)
        data = client_socket.recv(1024)
        return data

class TestEchoClient(unittest.TestCase):
    @patch('socket.socket')
    def test_echo_client(self, mock_socket):
        mock_socket_instance = MagicMock()
        mock_socket.return_value = mock_socket_instance
        
        mock_socket_instance.recv.return_value = b'Echo: Hello'

        response = echo_client('localhost', 12345, b'Hello')
        
        mock_socket_instance.connect.assert_called_with(('localhost', 12345))
        mock_socket_instance.sendall.assert_called_with(b'Hello')
        self.assertEqual(response, b'Echo: Hello')

if __name__ == '__main__':
    unittest.main()

Popularity 1/10 Helpfulness 1/10 Language python

Source: Grepper

Tags: python

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Contributed on Jun 04 2024

Xabos

0 Answers Avg Quality 2/10

mock socket python

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