### Question:
ScheduleUtil { public static String getLocalHostName() { try { InetAddress addr = getRealAddr(); if (addr != null && !addr.getHostAddress().equals(addr.getHostName())) { return addr.getHostName(); } return InetAddress.getLocalHost().getHostName(); } catch (Exception e) { return ""; } }  static String getLocalHostName(); static String getLocalIP(); static String dataToString(Date d); static String runningEntryFromTaskName(String taskName, String ownSign); static String taskNameFromRunningEntry(String runningEntry); static String ownsignFromRunningEntry(String runningEntry); static int[] generateSequence(int nodeCount, int jobCount, int nodeCapacity); static String getLeader(Collection<String> serverUuidList); static boolean isLeader(String serverUuid, List<String> serverUuidList);  }### Answer:
@Test public void getLocalHostNameTest() { assertNotNull(ScheduleUtil.getLocalHostName()); }