try {
Map<String, String> map = new HashMap<String, String>();
int nsCount = 0;
while (nsIter.hasNext()) {
nsCount++;
Namespace ns = nsIter.next();
map.put(ns.getPrefix(), ns.getName());
}
assertEquals("There should be exactly three namespaces", 3, nsCount);
assertTrue("namespace for prefix 'example' should exist", map.containsKey("example"));
assertTrue("namespace for prefix 'rdfs' should exist", map.containsKey("rdfs"));