@Test
public void testOtherwiseEmptyValue() throws Exception {

    addRow(1,
           "John",
           false);
    addRow(2,
           "",
           false);
    addRow(3,
           null,
           true);
    model.setData(data);
    String source = service.getSource(path,
                                      model);
    assertTrue("Expected: name not in ( \"John\", \"\" )",
               source.contains("$p : Person( name not in ( \"John\", \"\" )"));
}