Problem with @Autowire Spring + Hibernate and Junit

Good night, I'm trying to create a project using Hibernate and Spring, I was successful creating some configurations, I even managed to generate the database by initializing the application using Spring, however I'm "stuck" in creating my DAO's, I use the @Autowired annotation to inject a hibernate sessionFactory created in the spring context in my DaoGeneric class, but when trying to perform tests I get the NullPointerException error when the sessionFactory tries to retrieve a session through the getSession () method, below are some code: p>

Interfaces:

DaoI

     public interface DaoI<T> {

    public void persistir(T objeto);

    public void excluir (T objeto);

    public T get(Integer id);

    public List<T> listar(int de, int ate);

}

DaoUsuarioI

 public interface DaoUsuarioI<T> extends DaoI<T>{

    public void addUsuario(Usuario usuario);

    public void removerUsuario(Usuario usuario);

    public Usuario getUsuario(Integer id);

    public void atualizaUsuario(Usuario usuario);

    public List<Usuario> getUsuarios();

}

Classes:

DaoGeneric

@Transactional(propagation=Propagation.SUPPORTS)
public abstract class DaoGenerico<T> implements DaoI<T> {

    @Autowired
    private SessionFactory sessionFactory;

    private Session getSession(){return getSessionFactory().getCurrentSession();}

    public SessionFactory getSessionFactory() {return sessionFactory;}

    public void setSessionFactory(SessionFactory sessionFactory) {this.sessionFactory = sessionFactory;}

    @SuppressWarnings("rawtypes")
    protected abstract Class getClazz();

    public void persistir(T objeto) {
        getSession().persist(objeto);
    }

    public void excluir(T objeto) {
        getSession().delete(objeto);

    }

    @SuppressWarnings("unchecked")
    public T get(Integer id) {
        return (T) getSession().get(getClazz(), id);

    }

    @SuppressWarnings("unchecked")
    public List<T> listar(int de, int ate) {
        return (List<T>) getSession().createCriteria(getClazz()).setMaxResults(ate).setFirstResult(de).list();

    }

    @SuppressWarnings("unchecked")
    public List<T> listar() {
        return (List<T>) getSession().createCriteria(getClazz()).list();

    }

DaoUser

@Transactional(propagation=Propagation.SUPPORTS)
@Repository("daoUsuario")
public class DaoUsuario extends DaoGenerico<Usuario> implements DaoUsuarioI {


    public void addUsuario(Usuario usuario) {
        persistir(usuario);
    }

    public void removerUsuario(Usuario usuario) {
        removerUsuario(usuario);
    }

    public Usuario getUsuario(Integer id) {
        return get(id);
    }

    public void atualizaUsuario(Usuario usuario) {
        Session s = super.getSessionFactory().getCurrentSession();
        s.update(usuario);
    }

    public List<Usuario> getUsuarios() {
        return listar();
    }

    @SuppressWarnings("rawtypes")
    protected Class getClazz() {
        return Usuario.class;
    }

}

My context is set up in the spring-data.xml file below

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.1.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">


        <context:annotation-config />

        <context:component-scan base-package="br.com.springframework.persistencia" />

        <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
            <property name="sessionFactory" ref="sessionFactory"/>
        </bean>

        <tx:annotation-driven transaction-manager="transactionManager"/>

        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="com.mysql.jdbc.Driver"/>
            <property name="user" value="*******" />
            <property name="password" value="********" />
            <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/springframework"/>

            <property name="maxPoolSize" value="30" />
            <property name="acquireIncrement" value="1"/>
            <property name="maxIdleTime" value="120"/>
            <property name="acquireRetryAttempts" value="10"/>
            <property name="initialPoolSize" value="1" />
        </bean> 

        <bean id="sessionFactory" name="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            <property name="packagesToScan" value="br.com.springframework.entidades" />
            <property name="hibernateProperties">
                <props>
                    <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
                    <prop key="hibernate.hbm2ddl.auto">update</prop>
                </props>
            </property>
        </bean>



        <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
</beans>

I'm trying to create tests with JUnit to check the operation of the classes above, but to no avail ... could anyone help?

Thank you ...