How to get started with Jemmy v2

StackOverflow https://stackoverflow.com/questions/20478901

  •  30-08-2022
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Question

I want to learn how to test Java Swing user-interfaces and would like to try Jemmy v2. When trying to follow the instructions on http://jemmy.java.net/tutorial.html I ran into trouble. I created a new project currently consisting of only the following class, which I want to start the application I want to test and create a reference to this application. Unfortunately it seems I'm doing something fundamentally wrong, as an "java.lang.ClassCastException" exception is thrown as soon as the application i want to test is activated.

import org.netbeans.jemmy.*;
import org.netbeans.jemmy.explorer.*;
import org.netbeans.jemmy.operators.*;

public class Main implements Scenario 
{   
    public int runIt(Object param) 
    {
        try {
            //start application
            new ClassReference("org.netbeans.jemmy.explorer.GUIBrowser").startApplication();
            //wait frame
            new JFrameOperator("Tic-Tac-Toe 3.0");
        } catch(Exception e) {
            e.printStackTrace();
            return(1);
        }
        return(0);
    }

    public static void main(String[] argv) 
    {
        String[] params = {"sut2.TicTacToe"};
        org.netbeans.jemmy.Test.main(params);
    }
}

The exception I get:

Shortcut test events
Using org.netbeans.jemmy.drivers.DefaultDriverInstaller driver installer
Executed test sut2.TicTacToe
Exception in thread "main" java.lang.ClassCastException: sut2.TicTacToe cannot be cast to org.netbeans.jemmy.Scenario
    at org.netbeans.jemmy.Test.testForName(Test.java:265)
    at org.netbeans.jemmy.Test.<init>(Test.java:113)
    at org.netbeans.jemmy.Test.run(Test.java:176)
    at org.netbeans.jemmy.Test.run(Test.java:202)
    at org.netbeans.jemmy.Test.main(Test.java:250)
    at Main.main(Main.java:25)

sut2.TicTacToe is a class that implements ActionListener, but does not extend JFrame (I tried another even simpler java program that did, but got the same result). Inside this class a JFrame object is created and panels with GUI components are added.

Could you please tell/show me what I'm doing wrong and how I should properly setup Jemmy v2?

Was it helpful?

Solution

It looks that you pass the wrong params to org.netbeans.jemmy.Test.main. It expects implementation of Scenario. Assuming that Main is in default package, try the following: 

public static void main(String[] argv) {
    String[] params = { "Main" };
    org.netbeans.jemmy.Test.main(params);
}

You can specify the package of Main as needed.

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