*/
public void testDeleteFromIndexWriter() throws Exception {
boolean optimize = true;
Directory dir1 = new MockRAMDirectory();
IndexWriter writer = new IndexWriter(dir1, new WhitespaceAnalyzer(),
IndexWriter.MaxFieldLength.LIMITED);
writer.setReaderTermsIndexDivisor(2);
writer.setInfoStream(infoStream);
// create the index
createIndexNoClose(!optimize, "index1", writer);
writer.flush(false, true, true);
// get a reader
IndexReader r1 = writer.getReader();
String id10 = r1.document(10).getField("id").stringValue();
// deleted IW docs should not show up in the next getReader
writer.deleteDocuments(new Term("id", id10));
IndexReader r2 = writer.getReader();
assertEquals(1, count(new Term("id", id10), r1));
assertEquals(0, count(new Term("id", id10), r2));
String id50 = r1.document(50).getField("id").stringValue();
assertEquals(1, count(new Term("id", id50), r1));
writer.deleteDocuments(new Term("id", id50));
IndexReader r3 = writer.getReader();
assertEquals(0, count(new Term("id", id10), r3));
assertEquals(0, count(new Term("id", id50), r3));
String id75 = r1.document(75).getField("id").stringValue();
writer.deleteDocuments(new TermQuery(new Term("id", id75)));
IndexReader r4 = writer.getReader();
assertEquals(1, count(new Term("id", id75), r3));
assertEquals(0, count(new Term("id", id75), r4));
r1.close();
r2.close();
r3.close();
r4.close();
writer.close();
// reopen the writer to verify the delete made it to the directory
writer = new IndexWriter(dir1, new WhitespaceAnalyzer(),
IndexWriter.MaxFieldLength.LIMITED);
writer.setInfoStream(infoStream);
IndexReader w2r1 = writer.getReader();
assertEquals(0, count(new Term("id", id10), w2r1));
w2r1.close();