NetBeans 7.0 , JUnit and Glassfish Embedded 3.1: Does not work

I am trying to JUnit Test a J2EE Web Application with NB 7.0, JUnit and the embedded Glassfish Server in a Win7Professional machine.

I broke it down to just test a plain simple Hello-World Web App with a single Session Bean.

I have the glasfish-embedded-static-shell.jar in my classpath, and also tried to use the glassfish-embedded-all-3.1 but it also didn't work.

Now here's the code I use to test the bean:

import javax.ejb.embeddable.EJBContainer;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;

public class SimpleBeanTest {

private static EJBContainer container;

public SimpleBeanTest() {
}

@BeforeClass
public static void setUpClass() throws Exception {
    container = javax.ejb.embeddable.EJBContainer.createEJBContainer();
}

@AfterClass
public static void tearDownClass() throws Exception {
    container.close();
}

@Test
public void testCountToThree() throws Exception {
   System.out.println("countToThree");
   SimpleBean instance = (SimpleBean) container.getContext().lookup("java:global/classes/SimpleBean");
   int expResult = 0;
   int result = instance.countToThree();
   assertEquals(expResult, result);

}
}

And here's what comes out of it:

19.06.2011 09:31:56 com.sun.enterprise.v3.server.CommonClassLoaderServiceImpl findDerbyClient
INFO: Cannot find javadb client jar file, derby jdbc driver will not be available by default.
19.06.2011 09:31:56 org.glassfish.flashlight.impl.provider.FlashlightProbeProviderFactory processXMLProbeProviders
SCHWERWIEGEND: MNTG0301:Cannot process XML ProbeProvider, xml = META-INF/gfprobe-provider.xml
java.lang.IllegalStateException: Provider already mapped glassfish:javamail:smtp-transport

(StackTrace here)

19.06.2011 09:31:57 org.glassfish.flashlight.impl.provider.FlashlightProbeProviderFactory processXMLProbeProviders
SCHWERWIEGEND: MNTG0301:Cannot process XML ProbeProvider, xml = META-INF/mojarra-jsf-api-probe-provider.xml
java.lang.IllegalStateException: Provider already mapped glassfish:jsf:faces-servlet

(StackTrace here)

19.06.2011 09:31:57 org.glassfish.flashlight.impl.provider.FlashlightProbeProviderFactory processXMLProbeProviders
SCHWERWIEGEND: MNTG0301:Cannot process XML ProbeProvider, xml = jersey-gf-server-probe-provider.xml
java.lang.IllegalStateException: Provider already mapped glassfish:jersey:server-hidden

(StackTrace here)

19.06.2011 09:31:57 org.glassfish.flashlight.impl.provider.FlashlightProbeProviderFactory processXMLProbeProviders
SCHWERWIEGEND: MNTG0301:Cannot process XML ProbeProvider, xml = jersey-gf-statsprovider-probe-provider.xml
java.lang.IllegalStateException: Provider already mapped glassfish:jersey:server

(StackTrace here)

19.06.2011 09:31:57 org.glassfish.ha.store.spi.BackingStoreFactoryRegistry register
INFO: Registered org.glassfish.ha.store.adapter.cache.ShoalBackingStoreProxy for persistence-type = replicated in BackingStoreFactoryRegistry
19.06.2011 09:31:57 org.glassfish.ha.store.spi.BackingStoreFactoryRegistry register
INFO: Registered org.glassfish.ha.store.adapter.cache.ShoalBackingStoreProxy for persistence-type = replicated in BackingStoreFactoryRegistry
19.06.2011 09:31:57 com.sun.enterprise.v3.server.AppServerStartup run
SCHWERWIEGEND: Startdienst konnte nicht gestartet werden: com.sun.enterprise.naming.GlassFishNamingBuilder
19.06.2011 09:31:57 com.sun.enterprise.v3.server.AppServerStartup run
INFO: GlassFish Server Open Source Edition 3.1 (43) Startzeit: Embedded (597ms), Startdienste(929ms), gesamt(1.526ms)
19.06.2011 09:31:57 org.glassfish.admin.mbeanserver.JMXStartupService$JMXConnectorsStarterThread run
INFO: JMXStartupService: JMXConnector system is disabled, skipping.

UPDATE: And this is the exception which would be thrown by any test:

No EJBContainer provider available
Provider named org.glassfish.ejb.embedded.EJBContainerProviderImpl threw unexpected exception at create EJBContainer: 
java.lang.RuntimeException
java.lang.RuntimeException: java.lang.IllegalStateException: AMX Booter MBean is already registered: amx-support:type=boot-amx
    at org.glassfish.internal.embedded.Server.<init>(Server.java:290)
    at org.glassfish.internal.embedded.Server.<init>(Server.java:66)
    at org.glassfish.internal.embedded.Server$Builder.build(Server.java:176)

(Stack Trace here)

Caused by: java.lang.IllegalStateException: AMX Booter MBean is already registered: amx-support:type=boot-amx

I have reinstalled NetBeans twice and it doesn't works either.

I had the same issue and I did the following:

1) I installed Glassfish 3.1.1 and linked it to my project. First I added the server with Tools - Servers - Add Server... Then I right-clicked my EJB project and selected Properties - Run - Glassfish 3.1.1
2) In my EJB pom.xml I use this dependency (make sure the systemPath variable points to the correct file):

<dependency>
    <groupId>org.glassfish.extras</groupId>
    <artifactId>glassfish-embedded-static-shell</artifactId>
    <version>3.1.1</version>
    <scope>system</scope>
    <systemPath>${glassfish.embedded-static-shell.jar}</systemPath>
</dependency>

3) In my EJB pom.xml I removed the dependency other people said I have to add it if I get the errors "Provider already mapped..."

<dependency>
    <groupId>org.glassfish.extras</groupId>
    <artifactId>glassfish-embedded-all</artifactId>
    <version>3.1.1</version>
    <scope>test</scope>
</dependency>

That's it! Now my EJB JUnit tests with JPA 2 work like a charm! Hope this helps!