* @see junit.framework.TestCase#setUp()
*/
protected void setUp() throws Exception {
//Initialization of the index
this.directory = new RAMDirectory();
IndexWriter indexWriter = new IndexWriter(this.directory,new SimpleAnalyzer(),true);
Document document = new Document();
document.add(new Field("field", "a sample", Field.Store.YES, Field.Index.TOKENIZED));
document.add(new Field("filter", "a sample filter", Field.Store.YES, Field.Index.TOKENIZED));
document.add(new Field("sort", "2", Field.Store.YES, Field.Index.UN_TOKENIZED));
indexWriter.addDocument(document);