virtual void doWork()
 {
     // Update all 100 docs
     for (int32_t i = 0; i < 100; ++i)
     {
         DocumentPtr d = newLucene<Document>();
         d->add(newLucene<Field>(L"id", StringUtils::toString(i), Field::STORE_YES, Field::INDEX_NOT_ANALYZED));
         d->add(newLucene<Field>(L"contents", intToEnglish(i), Field::STORE_NO, Field::INDEX_ANALYZED));
         writer->updateDocument(newLucene<Term>(L"id", StringUtils::toString(i)), d);
     }
 }
TEST_F(IndexWriterReaderTest, testUpdateDocument) {
    bool optimize = true;

    DirectoryPtr dir1 = newLucene<MockRAMDirectory>();
    IndexWriterPtr writer = newLucene<IndexWriter>(dir1, newLucene<WhitespaceAnalyzer>(), IndexWriter::MaxFieldLengthLIMITED);

    // create the index
    createIndexNoClose(!optimize, L"index1", writer);

    // get a reader
    IndexReaderPtr r1 = writer->getReader();
    EXPECT_TRUE(r1->isCurrent());

    String id10 = r1->document(10)->getField(L"id")->stringValue();

    DocumentPtr newDoc = r1->document(10);
    newDoc->removeField(L"id");
    newDoc->add(newLucene<Field>(L"id", StringUtils::toString(8000), Field::STORE_YES, Field::INDEX_NOT_ANALYZED));
    writer->updateDocument(newLucene<Term>(L"id", id10), newDoc);
    EXPECT_TRUE(!r1->isCurrent());

    IndexReaderPtr r2 = writer->getReader();
    EXPECT_TRUE(r2->isCurrent());
    EXPECT_EQ(0, count(newLucene<Term>(L"id", id10), r2));
    EXPECT_EQ(1, count(newLucene<Term>(L"id", StringUtils::toString(8000)), r2));

    r1->close();
    writer->close();
    EXPECT_TRUE(r2->isCurrent());

    IndexReaderPtr r3 = IndexReader::open(dir1, true);
    EXPECT_TRUE(r3->isCurrent());
    EXPECT_TRUE(r2->isCurrent());
    EXPECT_EQ(0, count(newLucene<Term>(L"id", id10), r3));
    EXPECT_EQ(1, count(newLucene<Term>(L"id", StringUtils::toString(8000)), r3));

    writer = newLucene<IndexWriter>(dir1, newLucene<WhitespaceAnalyzer>(), IndexWriter::MaxFieldLengthLIMITED);
    DocumentPtr doc = newLucene<Document>();
    doc->add(newLucene<Field>(L"field", L"a b c", Field::STORE_NO, Field::INDEX_ANALYZED));
    writer->addDocument(doc);
    EXPECT_TRUE(r2->isCurrent());
    EXPECT_TRUE(r3->isCurrent());

    writer->close();

    EXPECT_TRUE(!r2->isCurrent());
    EXPECT_TRUE(!r3->isCurrent());

    r2->close();
    r3->close();

    dir1->close();
}