### Question:
PlaylistSubscriberStream extends AbstractClientStream implements
		IPlaylistSubscriberStream, IPlaylistSubscriberStreamStatistics { public void start() { if (engine == null) { IScope scope = getScope(); if (scope != null) { IContext ctx = scope.getContext(); ISchedulingService schedulingService = (ISchedulingService) ctx.getBean(ISchedulingService.BEAN_NAME); IConsumerService consumerService = (IConsumerService) ctx.getBean(IConsumerService.KEY); IProviderService providerService = (IProviderService) ctx.getBean(IProviderService.BEAN_NAME); engine = new PlayEngine.Builder(this, schedulingService, consumerService, providerService).build(); } else { log.info("Scope was null on start"); } } if (bwController == null) { bwController = (IBWControlService) getScope().getContext().getBean(IBWControlService.KEY); } bwContext = bwController.registerBWControllable(this); engine.setBandwidthController(bwController, bwContext); engine.setBufferCheckInterval(bufferCheckInterval); engine.setUnderrunTrigger(underrunTrigger); engine.start(); notifySubscriberStart(); } PlaylistSubscriberStream(); void setExecutor(ScheduledThreadPoolExecutor executor); ScheduledThreadPoolExecutor getExecutor(); void setBufferCheckInterval(int bufferCheckInterval); void setUnderrunTrigger(int underrunTrigger); void start(); void play(); void pause(int position); void resume(int position); void stop(); void seek(int position); void close(); boolean isPaused(); void addItem(IPlayItem item); void addItem(IPlayItem item, int index); void removeItem(int index); void removeAllItems(); void previousItem(); boolean hasMoreItems(); void nextItem(); void setItem(int index); boolean isRandom(); void setRandom(boolean random); boolean isRewind(); void setRewind(boolean rewind); boolean isRepeat(); void setRepeat(boolean repeat); void receiveVideo(boolean receive); void receiveAudio(boolean receive); void setPlaylistController(IPlaylistController controller); int getItemSize(); int getCurrentItemIndex(); IPlayItem getCurrentItem(); IPlayItem getItem(int index); void setBandwidthController(IBWControlService bwController); @Override void setBandwidthConfigure(IBandwidthConfigure config); void written(Object message); IPlaylistSubscriberStreamStatistics getStatistics(); long getCreationTime(); int getCurrentTimestamp(); long getBytesSent(); double getEstimatedBufferFill();  }### Answer:
@Test public void testStart() { System.out.println("testStart"); SimplePlayItem item = new SimplePlayItem(); item.setName("DarkKnight.flv"); pss.addItem(item); pss.start(); }