### Question:
DirPollAdaptor extends QBeanSupport implements DirPollAdaptorMBean { protected void initService () throws Exception { QFactory factory = getServer().getFactory(); dirPoll = createDirPoll(); dirPoll.setPath (getPath ()); dirPoll.setThreadPool (new ThreadPool (1, poolSize)); dirPoll.setPollInterval (pollInterval); if (priorities != null) dirPoll.setPriorities (priorities); dirPoll.setLogger (getLog().getLogger(), getLog().getRealm ()); Configuration cfg = factory.getConfiguration (getPersist()); dirPoll.setConfiguration (cfg); dirPoll.createDirs (); Object dpp = factory.newInstance (getProcessor()); if (dpp instanceof LogSource) { ((LogSource) dpp).setLogger ( getLog().getLogger(), getLog().getRealm () ); } if (dpp instanceof Configurable) { ((Configurable) dpp).setConfiguration (cfg); } dirPoll.setProcessor (dpp); } DirPollAdaptor(); synchronized void setPath(String path); synchronized void setPoolSize(int size); int getPoolSize(); String getPath(); synchronized void setPollInterval(long pollInterval); long getPollInterval(); synchronized void setPriorities(String priorities); String getPriorities(); synchronized void setProcessor(String processor); String getProcessor();  }### Answer:
@Test public void testInitServiceThrowsNullPointerException2() throws Throwable { DirPollAdaptor dirPollAdaptor = new DirPollAdaptor(); try { dirPollAdaptor.initService(); fail("Expected NullPointerException to be thrown"); } catch (NullPointerException ex) { if (isJavaVersionAtMost(JAVA_14)) { assertNull(ex.getMessage(), "ex.getMessage()"); } else { assertEquals("Cannot invoke \"org.jpos.q2.Q2.getFactory()\" because the return value of \"org.jpos.q2.iso.DirPollAdaptor.getServer()\" is null", ex.getMessage(), "ex.getMessage()"); } assertNull(dirPollAdaptor.dirPoll, "dirPollAdaptor.dirPoll"); assertTrue(dirPollAdaptor.isModified(), "dirPollAdaptor.isModified()"); } }