无法使用Web驱动程序IO运行基本测试

Question

我是网络驱动程序的新手，我正在尝试运行以下代码

var assert = require('assert');
describe('webdriver.io page', function() {
it('should have the right title', function () {
browser.url('/');
var title = browser.getTitle();
assert.equal(title,'WebDriverIO - Selenium 2.0 javascript bindings for nodejs');
});
});

当我试图运行$npm测试时，它会给我以下异常

> web-wedio@1.0.0 test /Users/user_namej/Downloads/web-wedio
> wdio
A service failed in the 'onPrepare' hook
Error: Selenium exited before it could start
Another Selenium process may already be running or your java version may be out of date.
Be sure to check the official Selenium release notes for minimum required java version: https://raw.githubusercontent.com/SeleniumHQ/selenium/master/java/CHANGELOG
at ChildProcess.errorIfNeverStarted (/Users/user_namej/Downloads/web-wedio/node_modules/selenium-standalone/lib/start.js:158:10)
at ChildProcess.emit (events.js:159:13)
at Process.ChildProcess._handle.onexit (internal/child_process.js:209:12)
Continue...
[23:57:43]  COMMAND POST     "/wd/hub/session"
ERROR: Error forwarding the new session Empty pool of VM for setup Capabilities [{rotatable=true, locationContextEnabled=true, loggingPrefs=org.openqa.selenium.logging.LoggingPreferences@9288a03, browserName=firefox, javascriptEnabled=true, handlesAlerts=true, maxInstances=5, requestOrigins={name=webdriverio, version=4.13.1, url=http://webdriver.io}}]
firefox
at new RuntimeError (/Users/user_namej/Downloads/web-wedio/node_modules/webdriverio/build/lib/utils/ErrorHandler.js:143:12)
at Request._callback (/Users/user_namej/Downloads/web-wedio/node_modules/webdriverio/build/lib/utils/RequestHandler.js:316:39)
at Request.self.callback (/Users/user_namej/Downloads/web-wedio/node_modules/request/request.js:185:22)
at Request.emit (events.js:159:13)
at Request.<anonymous> (/Users/user_namej/Downloads/web-wedio/node_modules/request/request.js:1157:10)
at Request.emit (events.js:159:13)
at IncomingMessage.<anonymous> (/Users/user_namej/Downloads/web-wedio/node_modules/request/request.js:1079:12)
at Object.onceWrapper (events.js:254:19)
at IncomingMessage.emit (events.js:164:20)
at endReadableNT (_stream_readable.js:1062:12)

我尽力了。使用关闭服务器

http://localhost:4444/selenium-server/driver/?cmd=shutDownSeleniumServer

但它重定向到500错误页面，我也尝试用不同的命令

lsof -i :4444
kill -9 $(lsof -ti tcp:4444)

仍然不起作用。我该怎么办。如果需要更多的细节，请告诉我

Answer 1

这个问题很傻，但你检查过你的java版本吗？

如果没有，也许这可以帮助解释你的问题：https://github.com/SeleniumHQ/selenium/issues/2043