// create MappingCharFilter
List<String> mappingRules = new ArrayList<>();
mappingRules.add( "\"ü\" => \"ü\"" );
NormalizeCharMap.Builder builder = new NormalizeCharMap.Builder();
builder.add("ü", "ü");
NormalizeCharMap normMap = builder.build();
CharFilter charStream = new MappingCharFilter( normMap, new StringReader( INPUT ) );
// create PatternTokenizer
Tokenizer stream = new PatternTokenizer(newAttributeFactory(), charStream, Pattern.compile("[,;/\\s]+"), -1);
assertTokenStreamContents(stream,