Question

I’m just trying to execute a basic selenium test. Nothing special, just to make sure it works.
BUT is throws an exception.
What could I be doing wrong?

Of course I started the server using: java -jar selenium-server-standalone-2.24.1.jar

import static org.junit.Assert.fail;

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.NoSuchElementException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class Selenium {
    private WebDriver driver;
    private String baseUrl;
    private StringBuffer verificationErrors = new StringBuffer();

    @Before
    public void setUp() throws Exception {
        driver = new FirefoxDriver();
        baseUrl = "http://www.google.de/";
        driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
    }

    @Test
    public void testSeleniumWeb() throws Exception {
    //empty just for testing
    }
}

Throws:

java.lang.AbstractMethodError: org.apache.crimson.tree.ElementNode2.getTextContent()Ljava/lang/String;
    at org.openqa.selenium.firefox.internal.FileExtension.readIdFromInstallRdf(FileExtension.java:134)
    at org.openqa.selenium.firefox.internal.FileExtension.writeTo(FileExtension.java:61)
    at org.openqa.selenium.firefox.internal.ClasspathExtension.writeTo(ClasspathExtension.java:64)
    at org.openqa.selenium.firefox.FirefoxProfile.installExtensions(FirefoxProfile.java:547)
    at org.openqa.selenium.firefox.FirefoxProfile.layoutOnDisk(FirefoxProfile.java:525)
    at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:74)
    at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:149)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:78)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:128)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:79)
    at de.coconet.soapui.selenium.setUp(selenium.java:15)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Answer 1

It’s nothing to do with your code. You have a classpath problem. Some classes depend on a different version of ElementNode2 than the one found first in your classpath.

If you look at jarfinder you can see that after JDK 1.4, this class is included in the Java runtime (rt.jar).

I suspect that you are using an older version of the JDK than the one that WebDriver was compiled against. WebDriver requires JDK 1.6+.