I am trying to unit test a SSB using the embedded container.

The problem I have is that I need a DataSource injected in the session bean:

 @Resource(mappedName = "java:/GP3DS")
 public DataSource dataSource;

When I perform the unit test (from an Ant script), the dataSource variable is null (and as soon as accessed of course throwing a NullPointerException).
However when I look it up the "traditional" way, using InitialContext.lookup(), it works just fin.
Also, in a regular JBoss AS (I'm using 4.0.5 GA) the injection using the annotation works perfectly well.

This is the code & configuration:

the session bean

@Stateless
public class CrossRatesBean implements gp3.xrate.CrossRatesLocal {
 @Resource(mappedName = "java:/GP3DS")
 private DataSource dataSource;

// do some SQL stuff

}

I configured the datasource like this in
embedded-jboss-beans.xml:

<bean name="DefaultDSBootstrap" class="org.jboss.resource.adapter.jdbc.local.LocalTxDataSource">
 <property name="driverClass">oracle.jdbc.OracleDriver</property>
 <property name="connectionURL">jdbc:oracle:thin:@gp3testserver:1521:gp3</property>
 <property name="userName">foo</property>
 <property name="password">bar</property>
 <property name="jndiName">java:/GP3DS</property>
 <property name="minSize">0</property>
 <property name="maxSize">10</property>
 <property name="blockingTimeout">1000</property>
 <property name="idleTimeout">100000</property>
 <property name="transactionManager"><inject bean="TransactionManager"/></property>
 <property name="cachedConnectionManager"><inject bean="CachedConnectionManager"/></property>
 <property name="initialContextProperties"><inject bean="InitialContextProperties"/></property>
 </bean>

 <bean name="GP3DS" class="java.lang.Object">
 <constructor factoryMethod="getDatasource">
 <factory bean="DefaultDSBootstrap"/>
 </constructor>
 </bean>

This code is working in the unit test:

 DataSource ds = (DataSource) ctx.lookup("java:/GP3DS");
 if (ds == null) {
 fail("Datasource java:/GP3DS not found!");
 } else {
 Connection con = ds.getConnection();
 Statement stmt = con.createStatement();
 ResultSet rs = stmt.executeQuery("SELECT TO_CHAR(SYSDATE, 'MM-DD-YYYY HH24:MI:SS') FROM DUAL");
 rs.next();
 System.out.println("SYSDATE on GP3Test: " + rs.getString(1));
 stmt.close();
 con.close();
 }

I don't understand why it should not work in the embedded container, but I cannot find what I am missing.
I'd greatly appreciate if someone could tell me what I'm doing wrong.