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Testing with JUnit or TestNG

Various approaches to initializing your application for testing

For unit type tests, initialization isn't usually a problem, as unit testing only tests a small "unit" isolated and not interacting with all the other "units" which make up your application. But there are other tests which may require many units of your application working cooperatively, and in order to work properly, all these units must be initialized properly.

Create a method which runs once before any tests

Your application should be initialzed just once before the tests. There are annotations etc. which allow one to pick a method which will be run prior to any tests. For a TestNG example (similar to Junit 4):


import er.extensions.appserver.ERXApplication;
import java.util.Properties;

import org.testng.annotations.BeforeTest;

import com.webobjects.appserver.WOApplication;

public class WOInit {
        static NSBundle MYBUNDLE = NSBundle.mainBundle();

	@BeforeTest  // init once
	public void initWO() {

		System.out.println("****InitWO starting...mainbundle is " + NSBundle.mainBundle().bundlePath());
		// somehow 'new' seems to init the static structures best myApp = new ) ;
		//ERXApplication.primeApplication(NSBundle.mainBundle().bundlePath(), null, "");
		//er.extensions.ERXExtensions.initApp(, new String[0]) ;
		System.out.println("****InitWO lists mainbundle:");;
		Properties props = System.getProperties();
		System.out.println("****InitWO ...Finished... ");



There are various ways (some commented out) to initialize your application in the above example.

  • myApp = new ) ;
  • ERXApplication.primeApplication(NSBundle.mainBundle().bundlePath(), null, ""); //(Wonder) or
  • WOApplication.primeApplication(NSBundle.mainBundle().bundlePath(), null, ""); //(No Wonder)
  • er.extensions.ERXExtensions.initApp(, new String[WO:0]) ;

One of them may work best in your situation. It may be important for your application to find its main bundle properly, and all the goodies bound up in that main bundle.

Minor configuration in eclipse

To be able to test your business objects layer in JUnit or TestNG test cases, you should set the following parameters in your test case/test suite launch configuration depending on if you are using normal or bundle-less builds.

Normal builds

A normal build means that you have checked the build option Generate bundles within the WOLips preferences.

First in the "Arguments" tab, set your working directory to the build product of your project. For example, for a framework project the working directory should be:


For an application it should be (using the handy wolips_dir_loc variable)


Then, in the classpath tab, select the "User Entries" entry and use the "Advanced..." button and select the "Add Folders" button.

Select the "Java" folder of your build product. Use the "Up/Down" buttons to move this folder at the first position of your classpath.

Be Careful

If during your tests execution you see error messages such as cannot cast EOGenericRecord to <your object> please check that the "Java" folder is at first position in your classpath entries.

The last step is to add the parameter -DNSProjectBundleEnabled=true to your VM parameters.

Bundle-less builds

A bundle-less build means that you have unchecked the build option Generate bundles within the WOLips preferences.

That means that there will be no build folder in your project. In that case you must set the working directoy to the default:


On the classpath tab you don't need to add the "Java" folder of your build product so only the default classpath should be listed for the "User Entries". Be sure to add the parameter -DNSProjectBundleEnabled=true to your VM parameters as for normal builds.

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  1. Assuming that you have a Wonder application, you should be able to test bundless-builds by adding -DNSProjectBundleEnabled=true to the VM arguments (yes, VM not Program).  This worked for TestNG, I have not tried with JUnit.

    1. You are right, with that setting it worked for me too. Though without the build folder when no bundles are generated you have to change the settings a little bit. Updated the wiki page to reflect that.

  2. hi, when you used your methods how you run your junit test case because a junit test can't run with woApplication and just junit application

    1. What do you mean with "your methods"? If you need part or complete application/EOF initialization for your tests look just below the code example on this page how to setup your environment (e.g. ERXExtensions.initApp(), ERXExtensions.initEOF(), …).

  3. hi, when you use your methods how you run your junit test case because a junit test can't run with woApplication and just junit application

  4. Hi. I'm kind of new in WO world, is there an example project where I can check the basic flow for development?

    I mean:

     - working code

     - test units for that code