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Testing Remote Screen Capture Integration in NW.js

This test suite validates screen capture functionality for remote content in NW.js applications, specifically addressing issue #4579. It tests the integration between NW.js desktop capabilities and web content served through a local HTTP server.

Test Coverage Overview

The test suite covers remote content capture functionality in NW.js applications.

Key areas tested include:

Remote content loading through node-remote permissions
Screen capture API integration
Local HTTP server interaction
Cross-platform compatibility (excluding Linux)

Implementation Analysis

The test implements a Selenium WebDriver approach to automate UI interactions and validate screen capture functionality. It utilizes Python’s subprocess management to handle a local HTTP server and Chrome WebDriver for browser automation.

Key patterns include:

Dynamic port allocation for test server
Package.json manifest generation
Chrome WebDriver configuration with NW.js specifics
Automated UI interaction and result verification

Technical Details

Testing tools and components:

Selenium WebDriver with Chrome options
Python HTTP server for content serving
Chrome Driver for browser automation
Custom nw_util helper functions

Configuration includes:

Dynamic port assignment
node-remote permissions
Chrome WebDriver logging
Platform-specific execution paths

Best Practices Demonstrated

The test demonstrates robust automation practices with proper resource management and error handling.

Notable practices include:

Proper test cleanup and resource termination
Platform-specific test skipping
Dynamic configuration management
Explicit wait conditions for UI elements
Clear success criteria validation

nwjs/nwJs

test/sanity/issue4579-capture-remote/test.py

            
import time
import os
import subprocess
import platform
import sys

if platform.system() == 'Linux':
    print('Skipped for Linux platform')
    sys.exit(0)


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
from selenium.webdriver.common import utils

chrome_options = Options()
chrome_options.add_argument("nwapp=" + os.path.dirname(os.path.abspath(__file__)))

testdir = os.path.dirname(os.path.abspath(__file__))
os.chdir(testdir)

port = str(utils.free_port())
server = subprocess.Popen(['python', 'http-server.py', port])

manifest = open('package.json', 'w')
manifest.write('''
{
  "name":"issue4579-capture-remote",
  "node-remote":"<all_urls>",
  "main":"http://localhost:%s/index.html"
}
''' % (port))
manifest.close()

driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options, service_log_path="log", service_args=["--verbose"])
driver.implicitly_wait(2)
try:
    print(driver.current_url)
    driver.find_element_by_id('start-share').click()
    result = driver.find_element_by_id('result')
    print(result.get_attribute('innerHTML'))
    assert("success" in result.get_attribute('innerHTML'))
finally:
    server.terminate()
    driver.quit()