Simple lucene example not working

Question

I am messing around with Lucene to see how it can help me and I am unable to get a very simple example working. I am using Lucene 5.1

Expectations is that when I search, I get the document ID for the document I added to the index in the console. I get nothing, no errors (just "Done" printed to console at the end)

Here is my code:

public static void main(String[] args) throws Exception {
    // create structure on file system
    IndexWriter writer = createOrGetIndexWriter(LocalDate.now());
    writer.close();

    // open for writing
    writer = createOrGetIndexWriter(LocalDate.now());

    Document document = new Document();
    document.add(new IntField("test_field", 1, Field.Store.YES));

    // write document and close.
    writer.addDocument(document);
    writer.commit();
    writer.close();

    // open reader
    IndexReader reader = getIndexReader(LocalDate.now());
    IndexSearcher indexSearcher = new IndexSearcher(reader);
    Query q = new TermQuery(new Term("test_field", "1"));

    // callback should be synchronous
    indexSearcher.search(q, new SimpleCollector() {
        @Override
        public void collect(int i) throws IOException {
            System.out.println(i);
        }

        @Override
        public boolean needsScores() {
            return false;
        }
    });

    System.out.println("Done");
}

public static IndexWriter createOrGetIndexWriter(LocalDate date) throws Exception {
    Directory directory = FSDirectory.open(Paths.get(date.toString()));
    IndexWriterConfig iwc = new IndexWriterConfig(new StandardAnalyzer());
    iwc.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND);
    return new IndexWriter(directory, iwc);
}

public static IndexReader getIndexReader(LocalDate date) throws Exception {
    return DirectoryReader.open(FSDirectory.open(Paths.get(date.toString())));
}