build: Reviving support for precompiled headers

This commit also includes an update of ./waf, which has several
improvements.  In particular, clang++ is now default compiler on OSX
platform.

This commit also includes reorganization of tests. All unit tests are
now under tests/unit-tests and integrated tests are under
tests/integrated.  This change allows small compilation optimization,
partially related to precompiled headers.

Change-Id: I4c171c04d18e9cb83e461264a35b9ed85ea4d50e
diff --git a/tests/unit-tests/util/test-config-file.cpp b/tests/unit-tests/util/test-config-file.cpp
new file mode 100644
index 0000000..9a0b680
--- /dev/null
+++ b/tests/unit-tests/util/test-config-file.cpp
@@ -0,0 +1,115 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "util/config-file.hpp"
+
+#include <cstdlib>
+
+#include "boost-test.hpp"
+
+namespace ndn {
+namespace tests {
+
+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(UtilTestConfigFile, ConfigFileFixture)
+
+BOOST_AUTO_TEST_CASE(TestParse)
+{
+  using namespace boost::filesystem;
+  // std::cerr << "current home = " << std::getenv("HOME") << std::endl;
+
+  setenv("HOME", "tests/unit-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/unit-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/unit-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 tests
+} // namespace ndn