I have worked on projects that uses Spring and unit testing with Spring was quite easy. Now I am working on Seam projects, so I wondered how can I do unit tests for my Repository classes with JPA.
I had some problems but here is a working environment in the end. ( it may have a few misunderstanding, I need to review it from the ref doc )

We have the regular src/main folder in our project.

under src/main, we have java and resources folder under as usual. I have jsut added the persistence.xml under resources/META-INF and it is as follows:

<?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="testUnit" transaction-type="RESOURCE_LOCAL">
		<provider>org.hibernate.ejb.HibernatePersistence</provider>
		<class>my.package.class</class>
                  ...
		<properties>
			<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
			<property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/eniyiyemektest?charSet=utf-8"/>
			<property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
			<property name="hibernate.connection.username" value="user"/>
			<property name="hibernate.connection.password" value="pass"/>
			<property name="hibernate.hbm2ddl.auto" value="create"/>
			<property name="hibernate.show.sql" value="true"/>
		</properties>
	</persistence-unit>


</persistence>

and that is it. My components.xml is in under resources folder also. And it is as :

<?xml version="1.0" encoding="UTF-8"?>
<components xmlns="http://jboss.com/products/seam/components"
            xmlns:core="http://jboss.com/products/seam/core"
            xmlns:persistence="http://jboss.com/products/seam/persistence"
            xmlns:transaction="http://jboss.com/products/seam/transaction"
            xmlns:security="http://jboss.com/products/seam/security"
            xmlns:web="http://jboss.com/products/seam/web"
            xmlns:mail="http://jboss.com/products/seam/mail"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation=
                "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.1.xsd 
                 http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.1.xsd 
                 http://jboss.com/products/seam/transaction http://jboss.com/products/seam/transaction-2.1.xsd 
                 http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.1.xsd
                 http://jboss.com/products/seam/web http://jboss.com/products/seam/web-2.1.xsd
                 http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-2.1.xsd
                 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.1.xsd">

    <core:manager conversation-timeout="120000" 
                  concurrent-request-timeout="500"
                  conversation-id-parameter="cid"/>

	<!-- Persistence -->
    <transaction:entity-transaction entity-manager="#{entityManager}"/>
                  
    <persistence:entity-manager-factory name="testUnit"/>
    
    <persistence:managed-persistence-context name="entityManager" auto-create="true" entity-manager-factory="#{testUnit}"/>
    
</components>

so I am ready to write my tests. under src/test/java/my/package I add this following test code.

public class UserRepositoryTest extends SeamTest{

@Test
public void testUserCreation() throws Exception{
new FacesRequest(){
@Override
protected void invokeApplication() throws Exception {
User user = new User();
user.setEmail( "test@mydomain.com" );
user.setPassword( "password" );
user.setFirstname( "firstname" );
user.setLastname( "lastname" );

Assert.assertNull( user.getId() );
UserRepository repo = (UserRepository) getInstance( "userRepository" );
Assert.assertNotNull( repo );

repo.create( user );

Assert.assertNotNull( user.getId() );
}

}.run();
}
}

and that is it. Small important checks are:

• Do not forget to extend from SeamTest class
• Use testNG not junit, I don’t why but junit didn’t work
• Use FacesRequest to run the tests, somwhow if you use ComponentTest class to run the tests ( which makes more sense also ) the transactions is not automatically done.