CdiTestBase.java

package com.example.cditest;

import java.util.HashMap;
import java.util.Map;

import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.se.SeContainer;
import javax.enterprise.inject.se.SeContainerInitializer;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.BeanManager;
import javax.inject.Inject;

import org.jboss.weld.context.bound.BoundRequestContext;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;

public class CdiTestBase {

    private static SeContainer seContainer;

    @Inject
    BoundRequestContext requestContext;

    private Map<String, Object> requestDataStore;

    @BeforeClass
    public static void startCdiContainer() {
        seContainer = SeContainerInitializer.newInstance()
                .addBeanClasses(EntityManagerFactoryProducer.class, EntityManagerProducer.class)
                .initialize();
    }

    @AfterClass
    public static void stopCdiContainer() {
        seContainer.close();
    }

    @Before
    public <T> void injectTestAndStartRequestScope() {
        BeanManager beanManager = seContainer.getBeanManager();
        AnnotatedType<T> at = (AnnotatedType<T>) beanManager.createAnnotatedType(getClass());
        CreationalContext<T> ctx = beanManager.createCreationalContext(null);
        beanManager.createInjectionTarget(at).inject((T)this, ctx);

        requestDataStore = new HashMap<String, Object>();
        requestContext.associate(requestDataStore);
        requestContext.activate();
    }

    @After
    public void stopRequestScope() {
        try {
            requestContext.invalidate();
            requestContext.deactivate();

        }
        finally {
            requestContext.dissociate(requestDataStore);
        }
    }
}

EntityManagerFactoryProducer.java

package com.example.cditest;

import java.util.Collections;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.BeanManager;
import javax.inject.Inject;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

@ApplicationScoped
public class EntityManagerFactoryProducer {

    @Inject
    private BeanManager beanManager;
    @Produces
    @ApplicationScoped
    public EntityManagerFactory produceEntityManagerFactory() {
        return Persistence.createEntityManagerFactory(
                "sinusTestPu",
                Collections.singletonMap("javax.persistence.bean.manager", beanManager)
        );
    }

    public void close(@Disposes EntityManagerFactory entityManagerFactory) {
        entityManagerFactory.close();
    }
}

EntityManagerProducer.java

package com.example.cditest;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;

@ApplicationScoped
public class EntityManagerProducer {

    @Inject
    private EntityManagerFactory entityManagerFactory;

    @Produces
    @RequestScoped
    public EntityManager produceEntityManager() {
        return entityManagerFactory.createEntityManager();
    }

    public void close(@Disposes EntityManager entityManager) {
        entityManager.close();
    }
}

SomeTest.java

package com.example.cditest;

import java.util.UUID;

import javax.inject.Inject;
import javax.persistence.EntityManager;

import org.junit.Before;
import org.junit.Test;

public class SomeTest extends CdiTestBase {

    @Inject
    private EntityManager entityManager;

    @Inject
    private SomeBean someBean;

    @Test
    public void test() {
        //...
    }
}