util, transport: add configuration file support and make default unix socket configurable

add sample library configuration file

refs: #1364

Change-Id: I3cb36d078aa3f0b0a50d9a83a521e95448df0a93
diff --git a/tests/transport/test-unix-transport.cpp b/tests/transport/test-unix-transport.cpp
new file mode 100644
index 0000000..ffb0494
--- /dev/null
+++ b/tests/transport/test-unix-transport.cpp
@@ -0,0 +1,66 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (C) 2014 Named Data Networking Project
+ * See COPYING for copyright and distribution information.
+ */
+
+#include <boost/test/unit_test.hpp>
+#include <boost/test/output_test_stream.hpp>
+
+#include "transport/unix-transport.hpp"
+#include "util/config-file.hpp"
+
+namespace ndn {
+
+class UnixTransportFixture
+{
+public:
+  UnixTransportFixture()
+  {
+    m_HOME = std::getenv("HOME");
+  }
+
+  ~UnixTransportFixture()
+  {
+    setenv("HOME", m_HOME.c_str(), 1);
+    // std::cerr << "restoring home = " << m_HOME << std::endl;
+  }
+
+protected:
+  std::string m_HOME;
+};
+
+BOOST_FIXTURE_TEST_SUITE(TestTransportUnixTransport, UnixTransportFixture)
+
+BOOST_AUTO_TEST_CASE(TestGetDefaultSocketNameOk)
+{
+  setenv("HOME", "tests/transport/test-homes/ok", 1);
+  ConfigFile config;
+  BOOST_REQUIRE_EQUAL(UnixTransport::getDefaultSocketName(config), "/tmp/test/nfd.sock");
+}
+
+BOOST_AUTO_TEST_CASE(TestGetDefaultSocketNameMissingSocketMissingProtocol)
+{
+  setenv("HOME", "tests/transport/test-homes/missing-unix-socket-missing-protocol", 1);
+  ConfigFile config;
+  BOOST_REQUIRE_EQUAL(UnixTransport::getDefaultSocketName(config), "/var/run/nfd.sock");
+}
+
+BOOST_AUTO_TEST_CASE(TestGetDefaultSocketNameMissingSocketNdndProtocol)
+{
+  setenv("HOME", "tests/transport/test-homes/missing-unix-socket-with-ndnd-protocol", 1);
+  ConfigFile config;
+  BOOST_REQUIRE_EQUAL(UnixTransport::getDefaultSocketName(config), "/tmp/.ndnd.sock");
+}
+
+BOOST_AUTO_TEST_CASE(TestGetDefaultSocketNameMissingSocketWithProtocol)
+{
+  setenv("HOME", "tests/transport/test-homes/missing-unix-socket-with-protocol", 1);
+  ConfigFile config;
+  BOOST_REQUIRE_EQUAL(UnixTransport::getDefaultSocketName(config), "/var/run/nfd.sock");
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace ndn
+