无头浏览器测试用例失败 - 硒网格

Question

Selenium 网格测试用例仅在无头浏览器模式下失败

普通浏览器模式[测试成功]

selenium 独立服务器：3.0.1
火狐：38.0.1
ip : 192.168.1.40

无头浏览器模式[测试失败]

selenium 独立服务器：3.0.1
火狐：38.0
ip : 172.18.0.60

我运行像下面这样的无头浏览器

xvfb-run java -Dwebdriver.firefox.marionette="/tmp/geckodriver" -Dwebdriver.firefox.bin="/tmp/firefox/firefox" -jar selenium-server-standalone-3.0.1.jar -role webdriver -hub http://192.168.1.106:4444/grid/register -port 5566 -host 172.18.0.60

测试用例代码：

package example;

import org.junit.Assert;
import org.openqa.selenium.*;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;

import java.net.URL;
import java.util.concurrent.TimeUnit;
import java.net.MalformedURLException;

public class NewTest
{
   public WebDriver driver;
   public String URL, Node;
   private JavascriptExecutor jse;
   private String baseUrl;

   protected ThreadLocal<RemoteWebDriver> threadDriver = null;

   @Parameters({"browser","url"})
   @BeforeTest
   public void launchapp(String browser,String url) throws MalformedURLException
   {
      baseUrl = "http://myhost";

      if (browser.equalsIgnoreCase("firefox"))
      {
         System.out.println(" Executing on FireFox");
         String Node = url;
         DesiredCapabilities cap = DesiredCapabilities.firefox();
         cap.setBrowserName("firefox");

         driver = new RemoteWebDriver(new URL(Node), cap);         
         // Puts an Implicit wait, Will wait for 10 seconds before throwing exception
         driver.manage().timeouts().implicitlyWait(50, TimeUnit.SECONDS);

         // Launch website
         driver.navigate().to(baseUrl);
         driver.manage().window().maximize();
      }          
      else
      {
         throw new IllegalArgumentException("The Browser Type is Undefined");
      }

      jse = (JavascriptExecutor)driver;
   }

   @Test
   public void functionalityTest() throws InterruptedException
   {      
       driver.findElement(By.linkText("Sign In")).click();
       driver.findElement(By.id("email")).clear();
       driver.findElement(By.id("email")).sendKeys("xxxxx@xxx.xxx");
       driver.findElement(By.id("pass")).clear();
       driver.findElement(By.id("pass")).sendKeys("xxxxxx");
       driver.findElement(By.id("send2")).click();    
       jse.executeScript("scroll(0, 250);");
       driver.findElement(By.cssSelector(".customerlink a")).click();
       Thread.sleep(1000);
       driver.findElement(By.linkText("My Account")).click();    
       Thread.sleep(2000);
       jse.executeScript("scroll(0, 250);");
       Thread.sleep(1000);
       jse.executeScript("scroll(0, -250);");
       Thread.sleep(2000);
       driver.findElement(By.cssSelector(".customerlink a")).click();
       Thread.sleep(1000);
       driver.findElement(By.linkText("Sign Out")).click();
       Thread.sleep(2000);  
   }

   @AfterTest
   public void closeBrowser()
   {
      driver.quit();
   }
}

我在无头浏览器模式的第一行出现异常

07:16:53.571 INFO - Executing: [new session: Capabilities [{marionette=true, browserName=firefox, version=, platform=ANY}]])
07:16:53.580 INFO - Creating a new session for Capabilities [{marionette=true, browserName=firefox, version=, platform=ANY}]
07:17:00.268 INFO - Attempting bi-dialect session, assuming Postel's Law holds true on the remote end
07:17:02.648 INFO - Detected dialect: OSS
07:17:02.665 INFO - Done: [new session: Capabilities [{marionette=true, firefoxOptions=org.openqa.selenium.firefox.FirefoxOptions@3e74110c, browserName=firefox, moz:firefoxOptions=org.openqa.selenium.firefox.FirefoxOptions@3e74110c, version=, platform=ANY}]]
07:17:02.701 INFO - Executing: [implicit wait: 50000])
07:17:02.717 INFO - Done: [implicit wait: 50000]
07:17:02.724 INFO - Executing: [get: http://myhost])
07:18:03.564 INFO - Done: [get: http://myhost]
07:18:03.570 INFO - Executing: [maximise window])
07:18:03.580 INFO - Done: [maximise window]
07:18:03.593 INFO - Executing: [find element: By.linkText: Sign In])
07:18:53.917 WARN - Exception thrown
org.openqa.selenium.NoSuchElementException: Unable to locate element: {"method":"link text","selector":"Sign In"}

喜欢

错误状态明明是无法定位元素，但是它在正常模式下是如何工作的？

使用无头浏览器模式的代码是否有任何限制？

Answer 1

终于发现，Headless浏览器没有考虑driver.manage().window().maximize();所以我通过xvfb-运行命令设置屏幕大小

-s "-screen 0, 1920x1080x24"

示例：

xvfb-run -s "-screen 0, 1920x1080x24" java -Dwebdriver.firefox.marionette="/tmp/geckodriver" -Dwebdriver.firefox.bin="/tmp/firefox/firefox" -jar selenium-server-standalone-3.0.1.jar -role webdriver -hub http://192.168.1.106:4444/grid/register -port 5566 -host 172.18.0.60

信息: 我正在使用 bootstrap 所以元素的可见性会根据屏幕大小进行更改。所以它会抛出元素未找到异常

无头浏览器测试用例失败 - 硒网格

headless browser test case failed - selemium grid

java

firefox

selenium

selenium-grid

headless-browser