Network log capture in Selenium Python - Test Execution Trace

Test Overview

This test opens a browser, navigates to a website, captures network logs during the page load, and verifies that the network log contains expected entries.

Test Code - Selenium

Selenium Python

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.common.by import By
from selenium.webdriver.chrome.options import Options
import json
import time

# Setup Chrome options to enable performance logging
chrome_options = Options()
chrome_options.set_capability('goog:loggingPrefs', {'performance': 'ALL'})

# Initialize WebDriver
service = Service()
driver = webdriver.Chrome(service=service, options=chrome_options)

try:
    # Navigate to example website
    driver.get('https://example.com')
    time.sleep(3)  # Wait for network activity

    # Capture performance logs
    logs = driver.get_log('performance')

    # Filter network request logs
    network_logs = []
    for entry in logs:
        message = json.loads(entry['message'])['message']
        if message['method'] == 'Network.requestWillBeSent':
            network_logs.append(message['params']['request']['url'])

    # Assert that the main page URL is in the network logs
    assert 'https://example.com/' in network_logs

finally:
    driver.quit()

Execution Trace - 7 Steps

Step	Action	System State	Assertion	Result
1	Initialize Chrome WebDriver with performance logging enabled	Chrome browser instance is ready with logging preferences set	-	PASS
2	Navigate to 'https://example.com'	Browser loads the example.com homepage	-	PASS
3	Wait 3 seconds to allow network requests to complete	Page and network activity stabilize	-	PASS
4	Retrieve performance logs from the browser	Collected raw performance log entries	-	PASS
5	Filter logs to extract URLs from 'Network.requestWillBeSent' events	List of requested URLs during page load is prepared	-	PASS
6	Assert that 'https://example.com/' is in the network logs	Verified that main page URL was requested	assert 'https://example.com/' in network_logs	PASS
7	Close the browser	Browser instance closed	-	PASS

Failure Scenario

Failing Condition: The network logs do not contain the main page URL 'https://example.com/'

Execution Trace Quiz - 3 Questions

What does the test check in the network logs?

A That the main page URL 'https://example.com/' was requested

B That the page title is correct

C That the browser window is maximized

D That the page contains a specific button

Key Result

Enabling browser performance logging in Selenium allows capturing network requests, which helps verify that expected resources are loaded during a test.