}
@Test
public void testDefaultPrefixExpansion() {
String defaultPrefix = "http://www.semanticweb.org/test/ont";
PrefixManager pm = new DefaultPrefixManager();
pm.setDefaultPrefix(defaultPrefix);
assertTrue(pm.containsPrefixMapping(":"));
assertNotNull(pm.getDefaultPrefix());
assertEquals(pm.getDefaultPrefix(), pm.getPrefix(":"));
String expansion = defaultPrefix + 'A';
IRI iri = pm.getIRI(":A");
assertEquals(iri.toString(), expansion);
}