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Testing Nested File System Event Monitoring in NW.js

This test suite validates file system event handling and PDF output functionality in NW.js applications using Selenium WebDriver. It specifically tests the monitoring of file rename events when generating and removing PDF files through the application interface.

Test Coverage Overview

The test ensures proper file system event monitoring for PDF file operations in NW.js applications. Key areas covered include:

PDF file generation and deletion
File system event detection for rename operations
Validation of event data accuracy
Cleanup of test artifacts

Implementation Analysis

The test implements a Selenium WebDriver approach to automate browser interactions and validate file system events. It utilizes Chrome options for NW.js app loading, implements explicit waits for element visibility, and verifies event data through DOM element content checking.

Chrome WebDriver initialization with NW.js configuration
Button click simulation for PDF generation
Event monitoring implementation
Assertion-based validation

Technical Details

Tools and configurations used:

Selenium WebDriver with Chrome driver
Python test framework
Custom utility functions (nw_util)
XPath and ID-based element selection
File system operations through os module
Explicit wait mechanisms

Best Practices Demonstrated

The test exemplifies robust testing practices for desktop applications built with NW.js. Notable practices include:

Proper test cleanup and resource management
Error handling with try-finally blocks
Explicit waits for reliable automation
Clear assertion messages
Modular test structure

nwjs/nwJs

test/sanity/issue5020-nested-loop/test.py

            
import time
import os
import sys
from selenium.webdriver.common.by import By

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__)))
testdir = os.path.dirname(os.path.abspath(__file__))
os.chdir(testdir)
try:
    os.remove('output.pdf')
except:
    pass

driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options)
try:
    print(driver.current_url)
    driver.find_element(By.XPATH, '//button[text()="test"]').click()
    wait_for_element_id_content(driver, 'ret', 'output.pdf', 20)
    time.sleep(2)
    os.remove('output.pdf')
    time.sleep(0.1)
    result = driver.find_element_by_id('ret').get_attribute('innerHTML')
    print(result)
    assert("filename: output.pdf; event: rename" == result)
finally:
    driver.quit()