Re: [swtbot-dev] NoClassDefFoundError for a class in runtime plugin depe

[Jordi Fernandez <jordi.fernandez@xxxxxxxxxxxxxxx>]

Here's the stack trace:

java.lang.NoClassDefFoundError: es/liberty/isis/core/ui/swt/widgets/ComboSearchSelector
    at es.liberty.swtbot.test.TestProducts.canCreateAMessage(TestProducts.java:34)
    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.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
    at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
    at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
    at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
    at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:66)
    at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
    at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
    at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:45)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
    at org.eclipse.swtbot.eclipse.core.RemotePluginTestRunner.main(RemotePluginTestRunner.java:64)
    at org.eclipse.swtbot.eclipse.core.UITestApplication.runTests(UITestApplication.java:117)
    at org.eclipse.ui.internal.testing.WorkbenchTestable$1.run(WorkbenchTestable.java:68)
    at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: es.liberty.isis.core.ui.swt.widgets.ComboSearchSelector
    at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:483)
    at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:399)
    at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:387)
    at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:87)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    ... 24 more



And test source code:

/*
 * es.liberty.swtbot.plugin/es.liberty.swtbot.test/TestProducts.java 23/02/2011
 */
package es.liberty.swtbot.test;

import org.eclipse.swtbot.eclipse.finder.SWTWorkbenchBot;
import org.eclipse.swtbot.swt.finder.utils.SWTBotPreferences;
import org.hamcrest.Matcher;
import org.junit.Before;
import org.junit.Test;

import es.liberty.isis.core.ui.swt.widgets.ComboSearchSelector;


import static org.eclipse.swtbot.swt.finder.matchers.WidgetMatcherFactory.widgetOfType;
import static org.eclipse.swtbot.swt.finder.matchers.WidgetMatcherFactory.allOf;
import static org.junit.Assert.assertTrue;

public class TestProducts {
    private SWTWorkbenchBot bot;

    @Test
    public void canCreateAMessage() throws Exception {
    SWTBotPreferences.TIMEOUT = 10000;
    bot.menu("Aplicacion").menu("Comercial").menu("Posición Global").click();
    
    Matcher matcher = allOf(
            widgetOfType(ComboSearchSelector.class)             
          );
    
    ComboSearchSelector combo = (ComboSearchSelector) bot.widget(matcher);
    assertTrue(combo.getItemCount() > 0);
    }

    @Before
    public void setup() {
    bot = new SWTWorkbenchBot();
    }
}

I have already checked that the plugin holding the ComboSearchSelector class is exporting the corresponding package (es.liberty.isis.core.ui.swt.widgets).

Regards,
Jordi.

On Thu, Feb 24, 2011 at 6:20 PM, Ketan Padegaonkar <ketanpadegaonkar@xxxxxxxxx> wrote:

Could you please share the stack trace and the complete unit test that causes thus issue?

- Ketan
studios.thoughtworks.com | eclipse.org/swtbot | @ketanpkr

On Feb 24, 2011 7:37 AM, "Jordi Fernandez" <jordi.fernandez@xxxxxxxxxxxxxxx> wrote:
> I'm developing a test with SWTBot that is throwing NoClassDefFoundError when
> trying to load a class that is present in a runtime plugin dependency.
>
> I'm using Eclipse 3.4.2. My workspace has several plugin projects for the
> product under development plus the SWTBot test plugin. Initially I code a
> simple test which just clicked in a menu. It runs fine:
>
> ---------
> public void menuTest() throws Exception {
>
> bot.menu("A").menu("B").menu("C").click();
>
> }
> ----------
>
>
> Then I tried to access a custom developed widget using the following code:
>
>
> ----------------
>
> public void menuTest() throws Exception {
> SWTBotPreferences.TIMEOUT = 10000;
> bot.menu("Aplicacion").menu("Comercial").menu("Posición
> Global").click();
> System.out.println("Hola");
>
> Matcher matcher = allOf(
> widgetOfType(ComboSearchSelector.class)
> );
>
> ComboSearchSelector combo = (ComboSearchSelector) bot.widget(matcher);
> assertTrue(combo.getItemCount() > 0);
> }
>
> --------------------
>
> This second test fails with a NoClassDefFoundError for the
> ComboSearchSelector class. This class is in one of the plugin projects of my
> workspace and is included as a plugin to load in the run configuration (as
> it is a required plugin for the product under development) . In order to
> compile my test, I added this plugin project as a project dependency in the
> java build path.
>
> How come I'm getting a NoClassDefFoundError at runtime when the referenced
> class is loaded (because the plug-in that holds it is present at runtime)?
>
> Thanks in advance.

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