需要有关Desiredcapabilities类的帮助

Question

您好，我是第一次学习selenium网格，我不明白为什么要使用Desired capabilities类在远程机器上设置浏览器名称和平台详细信息。

除了google-wiki页面，请让我知道是否有任何适当的文档

感谢prathima

Answer 1

并非所有远程机器(或会话)都支持用户请求的功能。例如，用户可能想在Windows上使用Chrome，但有些机器只在Linux上运行Firefox。

desiredCapabilities用于描述用户请求的会话的特性。你可以参考this link和this link获取更多信息。

Answer 2

 - when user send request to remote machine to run a particular test on
   a particular browser on a particular platform.
 - It doesn't mean that all the remote machine will support all the
   features requested by user such as (Particular browser on a
   particular machine).

**Example:**

 - If user request to execute a testcase on internet explorer on Linux
   platform. It doesn't mean that always Linux machine has internet
   explorer it would have firefox not internet Explorer(Because it is
   open source).
 - Linux machine doesn't support the features requested by a User. so
   that, that point of time we will use DesiredCapabilites class to set
   the platform , Browser Name and version of browser of Remote Machine
   to execute the Test.

Answer 3

Example:

package grid;

import static org.junit.Assert.*;

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

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.Platform;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;

public class SimpleGridTest
{
    WebDriver driver;
    String baseUrl , nodeUrl;

    @Before
    public void setUp() throws Exception 
    {
        WebDriver driver;
        String baseUrl , nodeUrl;
        baseUrl = "https://www.facebook.com";
        nodeUrl = "http://192.168.10.21:5568/wd/hub";

        DesiredCapabilities capability = DesiredCapabilities.firefox();
        capability.setBrowserName("firefox");
        capability.setPlatform(Platform.WIN8_1);


        driver = new RemoteWebDriver(new URL(nodeUrl),capability);
        driver.manage().window().maximize();
        driver.manage().timeouts().implicitlyWait(2, TimeUnit.MINUTES);
    }


    @Test
    public void test() throws InterruptedException
    {
        driver.manage().window().maximize();
        driver.get("https://www.google.co.in");

        driver.findElement(By.linkText("Gmail")).click();
        driver.findElement(By.id("Email")).sendKeys("abc@gmail.com");

        driver.findElement(By.id("Passwd")).sendKeys("1234");

        driver.findElement(By.id("signIn")).click();
    }

    @After
    public void tearDown() throws Exception 
    {
        driver.quit();
    }

}