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Testing Render Window Process Isolation in NW.js

This test suite validates the instance isolation behavior in NW.js by spawning multiple render windows and verifying their process independence. The test ensures proper window management and process separation using Selenium WebDriver for automation.

Test Coverage Overview

The test suite focuses on verifying process isolation between multiple render windows in NW.js.

Key areas covered include:

Spawning multiple render windows
Window handle management
Process ID verification
Cross-window interaction testing

Implementation Analysis

The test implements a Selenium WebDriver approach to automate window management and verification.

Notable patterns include:

Chrome WebDriver configuration with NW.js app path
Window handle switching and management
DOM element interaction and attribute extraction
Process ID comparison validation

Technical Details

Testing tools and configuration:

Selenium WebDriver with Chrome driver
Python test framework
Custom nw_util helper functions
Chrome options configuration for NW.js app
Window handle management utilities

Best Practices Demonstrated

The test exhibits strong quality practices in automated UI testing.

Notable practices include:

Proper test cleanup with driver.quit()
Explicit wait conditions for window handling
Clear assertion messages
Structured window navigation
Error handling with try-finally blocks

nwjs/nwJs

test/sanity/issue5163-new-instance/test.py

            
import time
import os
import sys
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from nw_util import *

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
chrome_options = Options()
chrome_options.add_argument("nwapp=" + os.path.dirname(os.path.abspath(__file__)))

driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options)
try:
    print(driver.current_url)
    driver.find_element_by_id('spawnRender').click()
    driver.find_element_by_id('spawnRender').click()
    print('wait for window open')
    wait_window_handles(driver, 3)
    print(driver.window_handles)
    print('switch to 1st window')
    driver.switch_to.window(driver.window_handles[-2])
    result1 = driver.find_element_by_id('result').get_attribute('innerHTML')
    print(result1)
    print('switch to 2nd window')
    driver.switch_to.window(driver.window_handles[-1])
    result2 = driver.find_element_by_id('result').get_attribute('innerHTML')
    print(result2)
    assert result1 != result2, "renders should not share same pid"
finally:
    driver.quit()