使用Selenium框架截图时出现"TypeError: rootNode is null“
使用Selenium框架截图时出现"TypeError: rootNode is null“
提问于 2019-09-16 09:59:23
为什么截图时会出现这个TypeError: rootNode is null错误？在HTML DOM结构中有没有开发人员应该修复的问题，或者是Selenium版本的问题？
截图时出现此错误：
org.openqa.selenium.WebDriverException: TypeError: rootNode is null
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'linuxhost', ip: 'x.x.x.x', os.name: 'Linux', os.arch: 'amd64', os.version: '2.6.32-754.17.1.el6.x86_64', java.version: '1.8.0_202'
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities {acceptInsecureCerts: true, browserName: firefox, browserVersion: 60.8.0, javascriptEnabled: true, moz:accessibilityChecks: false, moz:headless: false, moz:processID: 6651, moz:profile: /tmp/rust_mozprofile.LlBKoU..., moz:useNonSpecCompliantPointerOrigin: false, moz:webdriverClick: true, pageLoadStrategy: normal, platform: LINUX, platformName: LINUX, platformVersion: 2.6.32-754.17.1.el6.x86_64, rotatable: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}}
Session ID: 1afd06ed-4939-42c9-9d1d-51fa113dfe97
at org.openqa.selenium.remote.http.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:187)
at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:122)
at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:609)
at org.openqa.selenium.remote.RemoteWebDriver.getScreenshotAs(RemoteWebDriver.java:295)依赖项版本：
Firefox: Mozilla Firefox 60.8.0 geckodriver: 0.23.0 selenium: 3.141.59 geb-spock:3.0.1
回答 2
Stack Overflow用户
发布于 2019-09-16 10:50:51
我试过了，它对我很管用。
v0.25.0
- Webdriver: 3.141.59
- Firefox : 69.0 (64位)
- Gecko驱动程序
FirefoxDriver fdriver;
System.setProperty("webdriver.gecko.driver", "/path/geckodriver");
DesiredCapabilities capabilities = DesiredCapabilities.firefox();
capabilities.setCapability("marionette", true);
FirefoxOptions foptions = new FirefoxOptions();
foptions.merge(capabilities);
fdriver = new FirefoxDriver(foptions);
fdriver.get("http://demo.guru99.com/selenium/guru99home/");
File src = ((TakesScreenshot) fdriver).getScreenshotAs(OutputType.FILE);
try {
// now copy the screenshot to desired location using copyFile //method
FileUtils.copyFile(src, new File("path/fchart.png"));
fdriver.quit();
}
catch (IOException e) {
System.out.println(e.getMessage());
}Stack Overflow用户
发布于 2019-12-06 04:53:22
我发现了为什么会发生"TypeError: rootNode is null“错误。
如果test甚至在html页面源代码完全下载之前就尝试截图，则会发生此错误。
添加动态等待以等待页面完全加载确实修复了此问题。
waitFor {
((JavascriptExecutor)driver).executeScript("return document.readyState").equals("complete")
}
takeScreenshot()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/57949563
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