如何在硒服务器上提供自定义功能? [英] How to provide custom capabilities on the selenium server?

问题描述

我知道可以通过一种方法获得某些硒的功能，其中之一就是这样:

I know that some selenium capabilities can be obtained with a method, one of them like this :

driver.getCapabilities().getBrowserName();

它返回浏览器名称的值.

It returns the value of the browser name.

但是，如果它指的是可用的方法，如果我没有误会它，这似乎与自定义功能有关，就像我的意思:

But if it refers to an available method, if I don't misunderstand it, this seems to be related to custom capabilities, like this I mean :

driver.getCapabilities().getCapability("something ?");

返回值:值；如果未设置，则返回null.

Returns: The value, or null if not set.

所以，我试图编写一个简单的代码来获得我的意思.

So, I've tried to make a simple code to get the value I mean.

    private RemoteWebDriver driver;
    private URL url;
    private DesiredCapabilities dc = new DesiredCapabilities();

    @Before
    public void setUp() throws MalformedURLException {
        url = new URL("http://localhost:4444/wd/hub");
        dc.setCapability(CapabilityType.BROWSER_NAME, BrowserType.CHROME);
        //this is custom capability i mean
        dc.setCapability("testName", "Login");
        driver = new RemoteWebDriver(url, dc);
    }
    
    @Test
    public void test() {
        some code.....
    }
    
    @After
    public void tearDown() {
        System.out.println("Browser Name : "+ driver.getCapabilities().getCapability("browserName"));
        System.out.println("Test Name : "+ driver.getCapabilities().getCapability("testName"));
        driver.quit();
    }

使用json时，服务器日志显示为:

With json, server log say :

Capabilities are: {
  "browserName": "chrome",
  "testName": "Login"
}

但是我得到一个null值.

如何正确设置?您如何使我们的服务器提供testName功能?可以通过driver.getCapabilities().getCapability("testName");

How to the right setup ? How do you make our server provide the capabilities testName I mean? and can be obtained with driver.getCapabilities().getCapability("testName");

当前结果 Browser Name : chrome Test Name : null

预期结果 Browser Name : chrome Test Name : Login

感谢前进

推荐答案

听起来您正在寻找如何在Grid配置中添加自定义功能.这是可能的，但是需要几个步骤.

It sounds like what you're looking for is how to add a custom capability to your Grid configuration. This is possible, but requires several steps.

首先，您需要构建一个功能匹配器.匹配器将是其自己的项目，将Selenium-Server库和Selenium-Java库作为依赖项导入.您将需要一个扩展org.openqa.grid.internal.utils.DefaultCapabilityMatcher的类，并使用自己的逻辑覆盖matches()方法，以确定节点是否具备所需的功能.完成后，您将构建该项目并生成一个jar文件.

First, you need to build a capability matcher. The matcher will be its own project, importing the Selenium-Server and Selenium-Java libraries as dependencies. You'll need a single class that extends org.openqa.grid.internal.utils.DefaultCapabilityMatcher, and overrides the matches() method with your own logic to determine whether or not a node possesses the desired capability. When complete, you'll build this project and generate a jar file.

第二，您需要将新的匹配器附加到Grid Hub.我将匹配器jar存储在与selenium-server-standalone jar相同的目录中，并更改了正常的启动命令以容纳匹配器.

Second, you'll need to attach your new matcher to your Grid Hub. I store my matcher jars in the same directory as my selenium-server-standalone jar, and I alter my normal launch command to accommodate the matcher.

java -cp <custom-matcher>-1.0.0.jar;selenium-server-standalone-3.141.59.jar org.openqa.grid.selenium.GridLauncher -role hub -hubConfig hubConfig.json

在我的hubConfig.json中，我必须在JSON中添加两行以插入匹配器:

In my hubConfig.json, I had to add two lines to the JSON to wire in the matcher:

  "capabilityMatcher": "fully.qualified.path.to.Matcher",
  "throwOnCapabilityNotPresent": true,

第三，您需要配置节点以接受新功能.如果您还使用JSON来配置节点，则就像为功能添加新行一样简单:

Third, you'll need to configure your nodes to accept the new capability. If you're using JSON to also configure your nodes, it's just as simple as adding a new line for your capability:

"capabilityName": "foo"

就是这样.还值得注意的是，DesiredCapabilities确实具有称为applicationName的功能，该功能保留为用户可定义的值.根据您的特定用例，您也许可以利用此功能来代替添加新内容.

That's pretty much it. It's also worth noting that DesiredCapabilities does have a capability called applicationName, which is left as a user-definable value. Depending on your specific use case, you might be able to leverage this capability in place of adding something new.

当我学习此内容时，我在Github上发现了一个示例存储库.处理自己.这是一个基本设置，但是很好地说明了上面的步骤.它应该为您自己的实现提供一个很好的起点.

I found a sample repo on Github a while back when I was learning this process myself. It's a basic setup, but it illustrates the steps above pretty well. It should give you a great starting point for your own implementation.

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