public void multipleFlushTest() throws IOException {
final String filename = "longFile.writtenInMultipleFlushes";
final int bufferSize = 300;
Cache cache = cacheManager.getCache();
cache.clear();
Directory dir = DirectoryBuilder.newDirectoryInstance(cache, cache, cache, INDEXNAME).chunkSize(13).create();
byte[] manyBytes = fillBytes(bufferSize);
IndexOutput indexOutput = dir.createOutput(filename, IOContext.DEFAULT);
for (int i = 0; i < 10; i++) {
indexOutput.writeBytes(manyBytes, bufferSize);