} catch (final InterruptedException e) {
                logger.warn("Interrupted to wait a process.", e);
            }
            try {
                process.destroyForcibly().waitFor(processDestroyTimeout, TimeUnit.SECONDS);
                return process.exitValue();
            } catch (final Exception e) {
                logger.error("Could not destroy a process correctly.", e);
            }

        private final int exitValue;

        public TestProcess(int exitValue) {
            this.exitValue = exitValue;
        }

        @Override
        public int waitFor() throws InterruptedException {
            return exitValue;
        }

        @Override
        public int exitValue() {
            return exitValue;
        }

        @Override

        private final int exitValue;

        public TestProcess(int exitValue) {
            this.exitValue = exitValue;
        }

        @Override
        public int waitFor() throws InterruptedException {
            return exitValue;
        }

        @Override
        public int exitValue() {
            return exitValue;
        }

        @Override

        private final int exitValue;

        public MockProcess(int exitValue) {
            this.exitValue = exitValue;
        }

        @Override
        public int waitFor() {
            return exitValue;
        }

        @Override
        public int exitValue() {
            return exitValue;
        }

        @Override
        public void destroy() {

        Process p = pb.start();
        Future<String> outFuture = readStreamAsync(p.getInputStream());
        Future<String> errFuture = readStreamAsync(p.getErrorStream());
        int code = p.waitFor();
        String out = outFuture.get();
        String err = errFuture.get();
        return new ExecResult(code, out, err);
    }

    private static Future<String> readStreamAsync(InputStream inputStream) {

                        file.toAbsolutePath().toString(),
                        "5.32",
                        "5.27"
                    });

                    try {
                        assertEquals(0, p.waitFor(), "Unexpected exit code");
                    } catch (InterruptedException e) {
                        throw new InterruptedIOException(e.toString());
                    }

        ALL.stream()
                .filter(s -> !add.containsKey(s))
                .forEach(k -> processBuilder.environment().remove(k));
        Process process = processBuilder.start();
        process.waitFor();
        return new String(process.getInputStream().readAllBytes());
    }

        ProcessBuilder pb = new ProcessBuilder(cmd);
        Process p = pb.start();
        String out = readFully(p.getInputStream());
        String err = readFully(p.getErrorStream());
        int code = p.waitFor();
        return new ExecResult(code, out, err);
    }

    private static String readFully(InputStream in) throws IOException {

        Future<String> stdoutFuture = readStreamAsync(process.getInputStream());
        Future<String> stderrFuture = readStreamAsync(process.getErrorStream());

        int returnCode = process.waitFor();
        String stdout = stdoutFuture.get();
        String stderr = stderrFuture.get();
        return new ExecResult(stdout, stderr, returnCode);
    }

                    Thread err = new Thread(new StreamGobbler(process.getErrorStream(), shellContext.logger::error));
                    out.start();
                    err.start();
                    int exitCode = process.waitFor();
                    out.join();
                    err.join();
                    if (exitCode != 0) {
                        shellContext.logger.error("Shell command exited with code " + exitCode);