RobotFramework Selenium2Library and External Libraries- pass webdriver?

I have created a Java library that utilizes an instance of Selenium Web Driver. I would like to run the test I have written with this library, as well as the Selenium2Library. In a way, the Java Library would add some functionality that I need (working with Ajax elements), but much of the test could be written with Selenium2 keywords.

Is there a way to pass the webdriver instantiated in Selenium2Library to my external library so that they can run the same test?

Thank you for your input!

The current browser is stored in a WebDriverCache field that is protected. You could extend Selenium2Library and expose the WebDriver, but I think in this simple use case, you are better off using reflection instead. This way you can work with the original Selenium2Library. Others may feel differently. I will demonstrate both.

Both solutions provide a Get Current Browser keyword which you could take the result from and pass that into your library's constructor, etc.

Here you is a library with a keyword that will use reflection to access WebDriverCache and expose it:

// default package
import java.lang.reflect.Field;

import org.openqa.selenium.WebDriver;
import org.robotframework.selenium2library.keywords.BrowserManagement;
import org.robotframework.selenium2library.utils.WebDriverCache;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Misc {
    public static void goToGoogle() {
        getCurrentBrowser().get("http://www.google.com");
    }

    public static WebDriverCache getWebDriverCache() {
        try
        {
            BrowserManagement bm = (BrowserManagement) getLibraryInstance("Selenium2Library");
            Field cacheField = BrowserManagement.class.getDeclaredField("webDriverCache");
            cacheField.setAccessible(true);
            return (WebDriverCache) cacheField.get(bm);
        }
        catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static WebDriver getCurrentBrowser() {
        return getWebDriverCache().getCurrent();
    }

    private static Object getLibraryInstance(String library) throws ScriptException {
        ScriptEngine engine = new ScriptEngineManager().getEngineByName("python");
        engine.put("library", library);
        engine.eval("from robot.libraries.BuiltIn import BuiltIn");
        engine.eval("instance = BuiltIn().get_library_instance(library)");
        return engine.get("instance");
    }
}

Below you can see how it is used, mixing Selenium2Library keywords with keywords from Misc:

*** Settings ***
Test Teardown    Close All Browsers
Library    Selenium2Library
Library    Misc

*** Test Cases ***
Get Current Browser Test
    Open Browser    http://slashdot.org
    Go To Google
    Title Should Be    Google

If you want to use a custom Selenium2Library instead (inheritence), here is an example:

// default package
import org.openqa.selenium.WebDriver;


public class MySelenium2Library extends Selenium2Library
{
    public WebDriver getCurrentBrowser() {
        return this.webDriverCache.getCurrent();
    }
}

Interact with WebDriver instance directly from Robot Framework to make the example simpler:

*** Settings ***
Test Teardown    Close All Browsers
Library    MySelenium2Library

*** Test Cases ***
Get Current Browser Test
    Open Browser    http://slashdot.org
    ${driver}=    Get Current Browser
    Call Method    ${driver}    get    http://www.google.com
    Title Should Be    Google

来源：https://stackoverflow.com/questions/18220386/robotframework-selenium2library-and-external-libraries-pass-webdriver

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