@Test
public void testQuerySystemComplexCondition(){
Reference ref = new Reference();
ref.setValue("house md");
Parent parent = new Parent();
parent.setDescription("testing5");
parent.setReference(ref);
boolean value = admin.save(parent);
Assert.assertTrue(value);
Parent p = new Parent();
admin.obtain(p, "reference.value = 'house md' && description = 'testing5'");
Assert.assertEquals(p.getReference().getValue(), "house md");
Assert.assertEquals(p.getDescription(), "testing5");
}