systemHelper.setSystemCpuCheckInterval(0L);
        systemHelper.calibrateCpuLoad();
        assertEquals(0, systemHelper.waitingThreadNames.size());
        systemHelper.waitForNoWaitingThreads();
    }

    public void test_getVersion() {
        assertEquals("98.76.5", systemHelper.getVersion());
        assertEquals(98, systemHelper.getMajorVersion());

        @Override
        public boolean calibrateCpuLoad() {
            cpuLoadCallCount.incrementAndGet();
            return true;
        }

        @Override
        public void waitForNoWaitingThreads() {
            // Do nothing in test
        }

        public void setComponentAvailable(boolean available) {
            this.componentAvailable = available;
        }

                        ThreadUtil.sleep(interval); // 10 sec (default)
                    }

                    systemHelper.calibrateCpuLoad();
                    systemHelper.waitForNoWaitingThreads();

                    intervalControlHelper.delayByRules();

                    if (logger.isDebugEnabled()) {
                        logger.debug("Processing documents in IndexUpdater queue.");

        } finally {
            waitingThreadNames.remove(threadName);
        }
        return true;
    }

    /**
     * Waits for all waiting threads to complete.
     */
    public void waitForNoWaitingThreads() {
        int count = waitingThreadNames.size();
        while (count > 0) {
            if (logger.isInfoEnabled()) {
                logger.info("{} waiting thread(s).", count);
            }