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Validating Window Position Persistence in NW.js

This test suite validates window position persistence and state management in NW.js applications. It ensures proper handling of window coordinates and user data directory across multiple application launches.

Test Coverage Overview

The test suite covers window position persistence and state management functionality in NW.js.

Key areas tested include:

Window position tracking and storage
User data directory management
Application state persistence across launches
Cross-platform compatibility (Windows, Linux, MacOS)

Implementation Analysis

The testing approach utilizes Python with Selenium WebDriver integration to automate NW.js application launches and verify window state persistence.

Technical implementation highlights:

Multiple application instance management
File system operations for state verification
Platform-specific executable path handling
Automated cleanup of test artifacts

Technical Details

Testing tools and configuration:

Python test framework with Selenium WebDriver
ChromeDriver integration
Platform-specific path resolution
Custom user data directory management
File-based state verification mechanism

Best Practices Demonstrated

The test demonstrates robust testing practices for desktop applications.

Notable practices include:

Proper test cleanup and isolation
Cross-platform compatibility handling
Deterministic state verification
Automated test environment setup
Clear assertion points for validation

nwjs/nwJs

test/sanity/window-id-pos/test.py

            
import os
import sys
import shutil
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

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

datadir = os.path.join(testdir, 'userdata')
try:
    shutil.rmtree(datadir)
except:
    pass

try:
    os.remove('last_pos.txt')
except:
    pass
try:
    os.remove('succeed.txt')
except:
    pass
try:
    os.remove('failed.txt')
except:
    pass

pkg1 = os.path.dirname(os.environ['CHROMEDRIVER'])

if platform.system() == 'Darwin':
    exe = os.path.join(pkg1, 'nwjs.app', 'Contents', 'MacOS', 'nwjs')
elif platform.system() == 'Linux':
    exe = os.path.join(pkg1, 'nw')
else:
    exe = os.path.join(pkg1, 'nw.exe')


p = subprocess.call([exe, "--user-data-dir="+datadir, "."])

assert(os.path.exists('last_pos.txt'))

p = subprocess.call([exe, "--user-data-dir="+datadir, "."])

assert(os.path.exists('succeed.txt'))