EMProducer.java

package org.aslak.arquillian.test;

import javax.enterprise.inject.Produces;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

public class EMProducer {

    @PersistenceContext
    private EntityManager em;
    
    @Produces
    public EntityManager get() {
        return em;
    }
}

Foo.java

package org.aslak.arquillian.test;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;

@Entity
public class Foo {

    @Id @SequenceGenerator(name = "foo_sq")
    private long id;
    
    private String name;
    
    public Foo() {
    }
    
    public long getId() {
        return id;
    }
    
    public void setId(long id) {
        this.id = id;
    }
    
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
}

FooBar.java

package org.aslak.arquillian.test;

import javax.ejb.Stateful;
import javax.enterprise.context.SessionScoped;
import javax.inject.Inject;
import javax.inject.Named;
import javax.persistence.EntityManager;

@Named @SessionScoped @Stateful
public class FooBean {

    @Inject
    private EntityManager em;
    
    private Foo foo;
    
    public void setFoo(Foo foo) {
        this.foo = foo;
    }
    
    public void saveFoo() {
        em.merge(foo);
    }
}

FooBarTest.java

package org.aslak.arquillian.test;

import javax.inject.Inject;

import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.asset.EmptyAsset;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(Arquillian.class)
public class FooBeanTest {

    @Deployment
    public static Archive<?> deploy() {
        WebArchive archive = ShrinkWrap.create(WebArchive.class)
                .addClasses(Foo.class, FooBean.class, EMProducer.class)
                .addAsResource("test-persistence.xml", "META-INF/persistence.xml")
                .addAsWebInfResource(EmptyAsset.INSTANCE, "beans.xml");
        return archive;
    }

    @Inject
    private FooBean bean;
    
    @Test
    public void shouldSave() throws Exception {
        Foo foo = new Foo();
        foo.setName("Test");
        
        bean.setFoo(foo);
        bean.saveFoo();
    }
}

test-persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
    version="1.0">
    <persistence-unit name="conference">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>java:/jboss/datasources/ExampleDS</jta-data-source>
        <exclude-unlisted-classes>false</exclude-unlisted-classes>
        <properties>
            <property name="hibernate.hbm2ddl.auto" value="create-drop" />
            <property name="hibernate.show_sql" value="true" />
        </properties>
    </persistence-unit>
</persistence>