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/util/test-config-file.cpp b/tests/util/test-config-file.cpp
new file mode 100644
index 0000000..c091ccf
--- /dev/null
+++ b/tests/util/test-config-file.cpp
@@ -0,0 +1,98 @@
+/* -*- 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 "util/config-file.hpp"
+
+#include <cstdlib>
+
+namespace ndn {
+
+class ConfigFileFixture
+{
+public:
+  ConfigFileFixture()
+  {
+    m_HOME = std::getenv("HOME");
+  }
+
+  ~ConfigFileFixture()
+  {
+    setenv("HOME", m_HOME.c_str(), 1);
+    // std::cerr << "restoring home = " << m_HOME << std::endl;
+  }
+
+protected:
+  std::string m_HOME;
+};
+
+BOOST_FIXTURE_TEST_SUITE(TestConfigFile, ConfigFileFixture)
+
+BOOST_AUTO_TEST_CASE(TestParse)
+{
+  using namespace boost::filesystem;
+  // std::cerr << "current home = " << std::getenv("HOME") << std::endl;
+
+  setenv("HOME", "tests/util/config-file-home", 1);
+
+  path homePath(absolute(std::getenv("HOME")));
+  homePath /= ".ndn/client.conf";
+
+  try
+    {
+      ConfigFile config;
+
+      BOOST_REQUIRE_EQUAL(config.getPath(), homePath);
+
+      const ConfigFile::Parsed& parsed = config.getParsedConfiguration();
+      BOOST_CHECK_EQUAL(parsed.get<std::string>("a"), "/path/to/nowhere");
+      BOOST_CHECK_EQUAL(parsed.get<std::string>("b"), "some-othervalue.01");
+    }
+  catch(const std::runtime_error& error)
+    {
+      BOOST_FAIL("Unexpected exception: " << error.what());
+    }
+}
+
+BOOST_AUTO_TEST_CASE(EmptyPathParse)
+{
+  // std::cerr << "current home = " << std::getenv("HOME") << std::endl;
+
+  setenv("HOME", "tests/util/does/not/exist", 1);
+  try
+    {
+      ConfigFile config;
+    }
+  catch(const std::runtime_error& error)
+    {
+      BOOST_FAIL("Unexpected exception: " << error.what());
+    }
+}
+
+BOOST_AUTO_TEST_CASE(MalformedParse)
+{
+  using namespace boost::filesystem;
+  // std::cerr << "current home = " << std::getenv("HOME") << std::endl;
+
+  setenv("HOME", "tests/util/config-file-malformed-home", 1);
+
+  bool fileWasMalformed = false;
+  try
+    {
+      ConfigFile config;
+    }
+  catch(const ConfigFile::Error& error)
+    {
+      fileWasMalformed = true;
+    }
+
+  BOOST_REQUIRE(fileWasMalformed);
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace ndn