### Question:
WebXmlUtils { public static List<String> getFilterNames( Document webXml ) { return getNames( "filter", webXml ); }  static Document asDocument( File webXML ); static List<String> getServletNames( Document webXml ); static List<String> getFilterNames( Document webXml ); static String getServletClassName( Document webXml, String servletName ); static String getFilterClassName( Document webXml, String filterName ); static Map<String, String> getServletInitParams( Document webXml, String servletName ); static Map<String, String> getFilterInitParams( Document webXml, String filterName ); static Set<String> getServletUrlPatterns( Document webXml, String servletName ); static Set<String> getFilterUrlPatterns( Document webXml, String filterName );  }### Answer:
@Test public void testGetFilterNames() throws Exception { final Document webXml = WebXmlUtils.asDocument( new File( WebXmlUtilsTest.class.getResource( "/org/jivesoftware/util/test-web.xml" ).toURI() ) ); final List<String> results = WebXmlUtils.getFilterNames( webXml ); assertNotNull( results ); final Iterator iterator = results.iterator(); assertEquals( "AuthCheck", iterator.next() ); assertEquals( "PluginFilter", iterator.next() ); assertEquals( "Set Character Encoding", iterator.next() ); assertEquals( "LocaleFilter", iterator.next() ); assertEquals( "sitemesh", iterator.next() ); assertFalse( iterator.hasNext() ); }