private void putToZero() throws InterruptedException {
        assertTrue(sendMessage(TOZERO, createPutDocumentMessage()));

        Reply reply = driver.client().awaitReply(60, TimeUnit.SECONDS);
        assertTrue(reply instanceof WriteDocumentReply);
        assertFalse(reply.hasErrors());
    }
@author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
docproc/src/test/java/com/yahoo/docproc/jdisc/DocumentProcessingHandlerForkTestCase.java