Searching中关于索引的代码是什么呀？

Searching中关于索引的代码是：

public class DocumentDeleteTest extends 
BaselndexingTestCase[public void testDeleteBeforeIndexMerge()
throws IOException{ 
IndexReader reader= IndexReaderopen(dir);
assertEquals(2,reader.maxDoc());
assertEquals(2,reader.numDocs());
reader.delete(1);
assertTrue(reader.isDeleted(1));
assertTure(reader.hasDeletions());
assertEquals(2,reader.maxDoc());
assertEquals(1,reader.numDocs());
reader.close();
reader=IndexReader.open(dir);
asserEquals(2,reader.maxDoc());
asserEquals(1,reader.maxDocs());
reader.close();}