private void waitForFiles(final File folder, final int expectedAmount) throws InterruptedException
{
PollingProber prober = new PollingProber(PROBER_TIMEOUT, PROBER_POLLING_INTERVAL);
prober.check(new Probe() {
int lastAmount = 0;
@Override
public boolean isSatisfied() {
lastAmount = FileUtils.listFiles(folder, TrueFileFilter.INSTANCE, TrueFileFilter.INSTANCE).size();