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Testing Node.js Main Script Integration in NW.js

This test suite implements an automated Selenium-based verification of node-main functionality in NW.js applications. It validates the proper initialization and execution of Node.js main scripts through browser automation and dynamic template processing.

Test Coverage Overview

The test provides comprehensive coverage of node-main script execution in NW.js applications.

Key areas tested include:

Dynamic port allocation and template processing
Browser initialization with custom NW.js arguments
Node.js main script execution verification
Asynchronous result validation

Integration points span both the Node.js runtime and Chrome browser environments.

Implementation Analysis

The testing approach utilizes Selenium WebDriver to automate Chrome browser interactions with NW.js applications.

Key implementation patterns include:

Dynamic template substitution for port configuration
Chrome WebDriver setup with NW.js-specific options
Implicit wait mechanisms for async operations
Polling-based result verification

Technical Details

Testing tools and configuration:

Selenium WebDriver with Chrome options
Template-based test file generation
Environment-configured ChromeDriver path
Dynamic port allocation utilities
Implicit wait timeouts of 10 seconds
Maximum retry counter of 10 iterations

Best Practices Demonstrated

The test implementation showcases several testing best practices for NW.js applications.

Notable practices include:

Proper resource cleanup with driver quit
Dynamic test environment configuration
Robust async operation handling
Clear success criteria definition
Structured test file organization

nwjs/nwJs

test/sanity/node-main/test.py

            
import time
import os

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())

tpl = open('index_html.tpl', 'r')
content = tpl.read().replace('{port}', port)
tpl.close()

html = open('index.html', 'w')
html.write(content)
html.close()

tpl = open('index_js.tpl', 'r')
content = tpl.read().replace('{port}', port)
tpl.close()

html = open('index.js', 'w')
html.write(content)
html.close()

driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options)
try:
    print(driver.current_url)
    driver.implicitly_wait(10)
    driver.find_element_by_tag_name('button').click()
    result = 'node-main test'
    counter = 0
    while not 'success' in result and counter < 10:
        time.sleep(1)
        result = driver.find_element_by_id('result').get_attribute('innerHTML')
        print(result)
        counter = counter + 1
    assert('success' in result)
finally:
    driver.quit()