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Testing Worker Binary Compilation and Execution in NW.js

This test suite validates the functionality of worker binaries in NW.js using Selenium WebDriver for automation. It focuses on compiling JavaScript files to binary format and verifying their proper execution in a worker context.

Test Coverage Overview

The test coverage focuses on the binary compilation and execution workflow for NW.js workers.

Validates JavaScript to binary compilation using nwjc
Verifies binary file creation and existence
Tests worker execution and result verification
Handles cross-platform compatibility scenarios

Implementation Analysis

The implementation uses a combination of Python’s subprocess module and Selenium WebDriver to automate the testing process.

Utilizes Chrome WebDriver for browser automation
Implements file system operations for binary management
Employs assertion-based verification
Handles platform-specific binary naming conventions

Technical Details

Selenium WebDriver for browser automation
Python subprocess module for binary compilation
Chrome Options configuration for NW.js integration
Custom utility functions for element waiting and verification
Platform-aware path handling

Best Practices Demonstrated

The test implementation showcases robust error handling and cleanup practices in automated testing.

Proper resource cleanup with try-finally blocks
Explicit file existence checks
Cross-platform compatibility considerations
Clear separation of setup, execution, and verification phases

nwjs/nwJs

test/sanity/worker-nwbin/test.py

            
import time
import os
import shutil
import subprocess
import platform
from subprocess import Popen, PIPE
import sys
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()
testdir = os.path.dirname(os.path.abspath(__file__))
chrome_options.add_argument("nwapp=" + testdir)
binfile = os.path.join(testdir, "nw.bin")
nwjc = os.path.join(os.path.dirname(os.environ['CHROMEDRIVER']), "nwjc.exe" if os.name == "nt" else "nwjc")
os.chdir(testdir)
try:
  os.remove(binfile)
except:
  pass
assert(False == os.path.isfile(binfile))
subprocess.call([nwjc, "mytest.js", "nw.bin"])
assert(os.path.isfile(binfile))

driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options)
try:
    print(driver.current_url)
    result = wait_for_element_id_content(driver, 'result', '840')
    print(result)
    assert("840" == result)
finally:
    driver.quit()