code: @Test public void renderTemplate() throws Exception {
    registerAndRefreshContext();
    VelocityConfigurer velocity=this.context.getBean(VelocityConfigurer.class);
    StringWriter writer=new StringWriter();
    Template template=velocity.getVelocityEngine().getTemplate("message.vm");
    template.process();
    VelocityContext velocityContext=new VelocityContext();
    velocityContext.put("greeting","Hello World");
    template.merge(velocityContext,writer);
    assertThat(writer.toString(),containsString("Hello World"));
  }
  