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Testing WebView Local Resource Integration in NW.js

This test suite validates WebView local resource handling in NW.js applications, focusing on proper file URL resolution and resource loading within WebView components. It ensures secure and reliable access to local files through WebView instances.

Test Coverage Overview

The test suite provides comprehensive coverage of WebView’s local resource handling capabilities.

Tests URL path conversion for local file access
Validates WebView initialization with local content
Verifies proper loading of local HTML resources
Checks cross-origin resource handling

Implementation Analysis

The implementation utilizes Selenium WebDriver with Chrome options specifically configured for NW.js WebView testing. The test employs dynamic HTML content generation and template-based file manipulation to create test scenarios.

Uses Python’s urllib for URL handling
Implements custom WebView window management
Employs Chrome WebDriver for automation

Technical Details

Selenium WebDriver with Chrome integration
Python’s urllib for path-to-URL conversion
Custom nw_util helper functions
Chrome Options with WebView-specific configurations
Template-based HTML content generation
Platform-specific path handling

Best Practices Demonstrated

The test demonstrates robust error handling and resource cleanup practices in automated testing.

Proper driver cleanup in finally block
Platform-independent path handling
Explicit wait mechanisms for WebView switching
Structured test setup and teardown
Clear assertion conditions

nwjs/nwJs

test/sanity/webview-localres/test.py

            
import time
import os
import urllib.parse, urllib.request, urllib.parse, urllib.error
import sys
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from nw_util import *

def path2url(path):
        return urllib.parse.urljoin(
                  'file:', urllib.request.pathname2url(path))

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

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

chrome_options = Options()
chrome_options.add_argument("nwapp=" + testdir)
chrome_options.add_experimental_option("windowTypes", ["webview"])

capabilities = {"pageLoadStrategy": "none"}

htmlfile = os.path.join(testdir, '1.html')
localurl = path2url(testdir)

tpl = open('index.tpl', 'r')
if sys.platform == 'win32':
    htmlfile = htmlfile.replace('\\', '\\\\')
content = tpl.read().replace('{localfile}', htmlfile)
content = content.replace('{localdirurl}', localurl)
tpl.close()

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

driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options, desired_capabilities = capabilities, service_log_path="log", service_args=["--verbose"])
driver.implicitly_wait(5)
try:
    print(driver.current_url)
    wait_switch_window_name(driver, 'webview1')
    result = driver.find_element_by_id('result').get_attribute('innerHTML')
    print(result)
    assert('success' in result)
finally:
    driver.quit()