How to provide custom capabilities on the selenium server?

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

driver.getCapabilities().getBrowserName();

It returns the value of the browser name.

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 ?");

Returns: The value, or null if not set.

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();
    }

With json, server log say :

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

But i get a null value.

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");

Current result Browser Name : chrome Test Name : null

Expected result Browser Name : chrome Test Name : Login

Thanks advance

You can extract the WebDriver Capabilities e.g. Browser Name, Browser Version, Platform Name, etc using either of the following solutions:

Using direct APIs:

Code Block:

System.out.println("Class Name is : "+((RemoteWebDriver) driver).getCapabilities().getClass().toString());
System.out.println("Browser Name is : "+((RemoteWebDriver) driver).getCapabilities().getBrowserName().toLowerCase());
System.out.println("Browser Version is : "+((RemoteWebDriver) driver).getCapabilities().getVersion().toString());
System.out.println("Platform Name is : "+((RemoteWebDriver) driver).getCapabilities().getPlatform().toString());

Console Output:

Class Name is : class org.openqa.selenium.MutableCapabilities
Browser Name is : firefox
Browser Version is : 67.0
Platform Name is : WINDOWS

Using getCapability():

Code Block:

Capabilities cap = ((RemoteWebDriver) driver).getCapabilities();
System.out.println("acceptInsecureCerts value is: "+cap.getCapability("acceptInsecureCerts"));
System.out.println("Browser Name is : "+cap.getBrowserName());
System.out.println("Browser version is : "+cap.getVersion());           
System.out.println("Platform is : "+cap.getPlatform().toString());
System.out.println("javascriptEnabled value is: "+cap.getCapability("javascriptEnabled"));
System.out.println("moz:accessibilityChecks value is: "+cap.getCapability("moz:accessibilityChecks"));
System.out.println("moz:buildID value is: "+cap.getCapability("moz:buildID"));
System.out.println("geckodriverVersion value is: "+cap.getCapability("geckodriverVersion"));
System.out.println("Headless Mozilla value is: "+((RemoteWebDriver) driver).getCapabilities().getCapability("moz:headless"));
System.out.println("moz:headless value is: "+cap.getCapability("moz:headless"));
System.out.println("Mozilla Profile value is : "+ ((RemoteWebDriver) driver).getCapabilities().getCapability("moz:profile"));
System.out.println("moz:processID value is : "+cap.getCapability("moz:processID"));
System.out.println("moz:profile value is : "+cap.getCapability("moz:profile"));
System.out.println("moz:shutdownTimeout value is : "+cap.getCapability("moz:shutdownTimeout"));
System.out.println("moz:useNonSpecCompliantPointerOrigin value is : "+cap.getCapability("moz:useNonSpecCompliantPointerOrigin"));
System.out.println("moz:webdriverClick value is : "+cap.getCapability("moz:webdriverClick"));
System.out.println("pageLoadStrategy value is : "+cap.getCapability("pageLoadStrategy"));
System.out.println("Platform is : "+cap.getPlatform().toString());
System.out.println("platformName value is : "+cap.getCapability("platformName"));
System.out.println("platformVersion value is : "+cap.getCapability("platformVersion"));
System.out.println("rotatable value is : "+cap.getCapability("rotatable"));
System.out.println("setWindowRect value is : "+cap.getCapability("setWindowRect"));
System.out.println("strictFileInteractability value is : "+cap.getCapability("strictFileInteractability"));
System.out.println("timeouts values are : "+cap.getCapability("timeouts"));
System.out.println("unhandledPromptBehavior value is : "+cap.getCapability("unhandledPromptBehavior"));

Console Output:

acceptInsecureCerts value is: true
Browser Name is : firefox
Browser version is : 67.0
Platform is : WINDOWS
javascriptEnabled value is: true
moz:accessibilityChecks value is: false
moz:buildID value is: 20190516215225
geckodriverVersion value is: null
Headless Mozilla value is: false
moz:headless value is: false
Mozilla Profile value is : C:\Users\Debanjan.B\AppData\Local\Temp\rust_mozprofile.7HI7QUtzF1YP
moz:processID value is : 7308
moz:profile value is : C:\Users\Debanjan.B\AppData\Local\Temp\rust_mozprofile.7HI7QUtzF1YP
moz:shutdownTimeout value is : 60000
moz:useNonSpecCompliantPointerOrigin value is : false
moz:webdriverClick value is : true
pageLoadStrategy value is : normal
Platform is : WINDOWS
platformName value is : WINDOWS
platformVersion value is : 6.2
rotatable value is : false
setWindowRect value is : true
strictFileInteractability value is : false
timeouts values are : {implicit=0, pageLoad=300000, script=30000}
unhandledPromptBehavior value is : dismiss and notify

You can find the list of the supported capabilities in the Capabilities section within the WebDriver W3C Recommendation

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.

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.

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

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,

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"

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.

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.

来源：https://stackoverflow.com/questions/57352924/how-to-provide-custom-capabilities-on-the-selenium-server

标签

java

selenium

remotewebdriver

desiredcapabilities