### Question:
LogFormatter extends Formatter { public String format(LogRecord record) { IOFogNetworkInterfaceManager fogNetworkInterfaceManager = IOFogNetworkInterfaceManager.getInstance(); final DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); JsonBuilderFactory factory = Json.createBuilderFactory(null); JsonObjectBuilder jsonObjectBuilder = factory.createObjectBuilder(); jsonObjectBuilder.add("timestamp", df.format(System.currentTimeMillis())); jsonObjectBuilder.add("level", record.getLevel().toString()); jsonObjectBuilder.add("agent_id", Configuration.getIofogUuid()); jsonObjectBuilder.add("pid", fogNetworkInterfaceManager.getPid() != 0 ? fogNetworkInterfaceManager.getPid() : fogNetworkInterfaceManager.getFogPid()); jsonObjectBuilder.add("hostname", fogNetworkInterfaceManager.getHostName() != null ? fogNetworkInterfaceManager.getHostName(): IOFogNetworkInterface.getHostName()); jsonObjectBuilder.add("thread", record.getSourceClassName()); jsonObjectBuilder.add("module", record.getSourceMethodName()); jsonObjectBuilder.add("message", record.getMessage()); if (record.getThrown() != null) { jsonObjectBuilder.add("exception_message", record.getThrown().getLocalizedMessage()); jsonObjectBuilder.add("stacktrace", ExceptionUtils.getFullStackTrace(record.getThrown())); } return jsonObjectBuilder.build().toString().concat("\n"); }  String format(LogRecord record);  }### Answer:
@Test public void testFormat() { assertTrue(logFormatter.format(logRecord).contains("SEVERE")); }