Rights rights = new Rights(true, true, true);
PropertyReader.setProperty("output.indexLevel", "0");
String index = rights.buildIndex(0, 1);
assertEquals("", index);
index = rights.buildIndex(2, 4);
assertEquals("", index);
PropertyReader.setProperty("output.indexLevel", "unknown");
index = rights.buildIndex(0, 1);
assertEquals("", index);