Written a test case setting up a file system and tearing it down again afterwards

src/test/testutils/Daemon.cpp

@@ -0,0 +1,32 @@
+#include "Daemon.h"
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+using std::function;
+
+Daemon::Daemon(function<void()> runnable)
+  : _runnable(runnable), _child_pid(0) {
+}
+
+void Daemon::start() {
+  _child_pid = fork();
+  if (_child_pid == 0) {
+    _runnable();
+    exit(0);
+  }
+}
+
+void Daemon::stop() {
+  int retval = kill(_child_pid, SIGINT);
+  if (retval != 0) {
+    throw std::runtime_error("Failed killing child process");
+  }
+  int status;
+  pid_t pid = waitpid(_child_pid, &status, 0);
+  if (pid != _child_pid) {
+    throw std::runtime_error("Failed waiting for child process to die");
+  }
+}

src/test/testutils/Daemon.h

@@ -0,0 +1,18 @@
+#pragma once
+#ifndef TEST_TESTUTILS_DAEMON_H_
+#define TEST_TESTUTILS_DAEMON_H_
+
+#include <functional>
+
+class Daemon {
+public:
+  Daemon(std::function<void()> runnable);
+  void start();
+  void stop();
+
+private:
+  std::function<void()> _runnable;
+  pid_t _child_pid;
+};
+
+#endif