### Question:
ResultLogger { public void interrupt() { if (logThread != null) { try { logThread.interrupt(); } catch (SecurityException ex) { Logger.getLogger(this.getClass()) . warn("Internal error : Current Thread is not allow to interrupt the logThread in Logger.interrupt()"); } } } ResultLogger(String folderWhereResultsAreSaved,
			DocumentGenerator documentGenerator, String confilepath, boolean isResourceslogged);  ResultLogger(String folderWhereResultsAreSaved,
			DocumentGenerator documentGenerator, String confilepath); void generateGraphFile(); void generatepltFile(); void addInfotoActionLogger(String MsgType, String actionName, Date startTime,
			Date endTime); void writeActionLogFile(); void writeActionLogFile(String xmlfilepath); void addInfoToDocumentLogger(String s, int line, String currentScript); void addWarningToDocumentLogger(String s, int line, String currentScript); void addErrorToDocumentLogger(String s, int line, String currentScript); void addToDocumentLogger(float value, String doctype); void addResourcesInfoToDocumentLogger(); void addPerfListener(IMeasureListener listener); void removePerfListener(IMeasureListener listener); IMeasureListener[] getPerfListeners(); boolean saveScreenshot(String fileName, RenderedImage image); void setPhoneInterface(PhoneInterface phoneInterface); void setInterpreter(JATKInterpreter interpreter); void start(int iInterval); void interrupt(); void join(); boolean isAlive(); void dumpInStream(boolean isParseErrorHappened); PhoneInterface getPhoneInterface(); void setStopATK(boolean stopATK); boolean isStopATK(); DocumentLogger getDocumentLogger(); void setDocumentLogger(DocumentLogger documentLogger); ActionsLogger getActionsLogger();  }### Answer:
@Test(expected = NullPointerException.class) public void testCallInterruptWithoutCallStart() throws FileNotFoundException { ResultLogger l = new ResultLogger(Platform.TMP_DIR, new TextGenerator(new FileOutputStream(new File( Platform.TMP_DIR + Platform.FILE_SEPARATOR + "tmp.txt"))),"C:\\Program Files\\JATK\\Salome-script\\Confile.xml"); l.interrupt(); }