From c495e6b4753d11b0104819ce6bc4de9bbd1e3de0 Mon Sep 17 00:00:00 2001
From: Sebastian Messmer <mail@smessmer.de>
Date: Mon, 17 Nov 2014 21:13:58 +0100
Subject: [PATCH] Written a test case setting up a file system and tearing it
 down again afterwards

---
 src/test/testutils/Daemon.cpp | 32 ++++++++++++++++++++++++++++++++
 src/test/testutils/Daemon.h   | 18 ++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 src/test/testutils/Daemon.cpp
 create mode 100644 src/test/testutils/Daemon.h

diff --git a/src/test/testutils/Daemon.cpp b/src/test/testutils/Daemon.cpp
new file mode 100644
index 00000000..675e1273
--- /dev/null
+++ b/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");
+  }
+}
diff --git a/src/test/testutils/Daemon.h b/src/test/testutils/Daemon.h
new file mode 100644
index 00000000..36b861f9
--- /dev/null
+++ b/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