### Question:
PageFormat extends CommonNodeWrapper implements Comparable<PageFormat> { public String label() { return getPropertyValue( RDFS.label ).getLexicalForm(); } PageFormat( Page page, Resource root ); String label(); MediaType mimeType(); com.epimorphics.rdfutil.RDFNodeWrapper isFormatOf(); @Override int compareTo( PageFormat o );  }### Answer:
@Test public void testLabel() { assertEquals( "ttl", pageFormat.label() ); }