public void test_startProcess_basicCommand() {
        String sessionId = "test_session";
        List<String> cmdList = Arrays.asList("echo", "hello");
        Consumer<ProcessBuilder> pbCall = pb -> {
            pb.redirectErrorStream(true);
        };

        try {
            JobProcess jobProcess = processHelper.startProcess(sessionId, cmdList, pbCall);
            assertNotNull(jobProcess);

            }

            final JobProcess jobProcess = processHelper.startProcess(sessionId, cmdList, pb -> {
                pb.directory(baseDir);
                pb.redirectErrorStream(true);
            });

            final InputStreamThread it = jobProcess.getInputStreamThread();
            it.start();

            final Process currentProcess = jobProcess.getProcess();

            }

            final JobProcess jobProcess = processHelper.startProcess(sessionId, cmdList, pb -> {
                pb.directory(baseDir);
                pb.redirectErrorStream(true);
            });

            final InputStreamThread it = jobProcess.getInputStreamThread();
            it.start();

            final Process currentProcess = jobProcess.getProcess();

            }

            final JobProcess jobProcess = processHelper.startProcess(sessionId, cmdList, pb -> {
                pb.directory(baseDir);
                pb.redirectErrorStream(true);
                final Map<String, String> environment = pb.environment();
                environment.put("SESSION_ID", sessionId);

        }).toArray(n -> new String[n]));
        final ProcessBuilder pb = new ProcessBuilder(cmds);
        if (workingDirectory != null) {
            pb.directory(workingDirectory);
        }
        pb.redirectErrorStream(true);

        Process currentProcess = null;
        MonitorThread mt = null;
        try {
            currentProcess = pb.start();

            // monitoring

        Process p = null;
        InputStreamThread ist = null;
        try {
            final ProcessBuilder pb = new ProcessBuilder(cmdList);
            pb.directory(baseDir);
            pb.redirectErrorStream(true);

            if (logger.isDebugEnabled()) {
                logger.debug("Thumbnail Command: {}", cmdList);
            }

            p = pb.start();

            }

            final JobProcess jobProcess = processHelper.startProcess(sessionId, cmdList, pb -> {
                pb.directory(baseDir);
                pb.redirectErrorStream(true);
            });

            final InputStreamThread it = jobProcess.getInputStreamThread();
            it.start();

            final Process currentProcess = jobProcess.getProcess();