code:   public void testNamedEntity() throws Exception {
      assertU("<?xml version=\"1.0\" ?>\n"+
              "<!DOCTYPE add [\n<!ENTITY wacky \"zzz\" >\n]>"+
              "<add><doc>"+
              "<field name=\"id\">1</field>"+
              "<field name=\"foo_s\">&wacky;</field>" + 
              "</doc></add>");
      
      assertU("<commit/>");
      assertQ(req("foo_s:zzz"),
              "//*[@numFound='1']"
              );
    }
    
    @Test
  