### Question:
MasterStartupTool { @VisibleForTesting static Injector createInjector(CConfiguration cConf, Configuration hConf) { return Guice.createInjector( new ConfigModule(cConf, hConf), new ZKClientModule(), new ZKDiscoveryModule(), new IOModule(), new KafkaClientModule(), new DFSLocationModule() ); } MasterStartupTool(Injector injector); static void main(String[] args); boolean canStartMaster();  }### Answer:
@Test public void testInjector() throws Exception { MasterStartupTool.createInjector(CConfiguration.create(), HBaseConfiguration.create()); }