Resolve "Add GTests"

Closes #25 (closed)

CMakeLists.txt

@@ -26,6 +26,16 @@ message(STATUS "Configured to compile in ${CMAKE_BUILD_TYPE} mode.")
 SET(CMAKE_CXX_FLAGS_DEBUG "-g -Wall -D_REENTRANT")
 SET(CMAKE_CXX_FLAGS_RELEASE "-O3 -D_REENTRANT")
 
+#Build tests
+IF(NOT BUILD_TESTS)
+  OPTION(BUILD_TESTS "Build Unit tests" ON)
+ENDIF(NOT BUILD_TESTS)
+
+#Build demos
+IF(NOT BUILD_DEMOS)
+  OPTION(BUILD_DEMOS "Build demos" ON)
+ENDIF(NOT BUILD_DEMOS)
+
 #Set compiler according C++11 support
 include(CheckCXXCompilerFlag)
 CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
@@ -40,9 +50,20 @@ else()
         message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
 endif()
 
-
 ADD_SUBDIRECTORY(src)
 
+#Build tests
+IF(BUILD_TESTS)
+	# Enables testing for this directory and below.
+    # Note that ctest expects to find a test file in the build directory root.
+    # Therefore, this command should be in the source directory root.
+    #include(CTest) # according to http://public.kitware.com/pipermail/cmake/2012-June/050853.html
+  	MESSAGE("Building tests.")
+    enable_testing()
+    set(_LASER_SCAN_UTILS_ROOT_DIR ${CMAKE_SOURCE_DIR})
+  	add_subdirectory(test)
+ENDIF(BUILD_TESTS)
+
 FIND_PACKAGE(Doxygen)
 
 FIND_PATH(IRI_DOC_DIR doxygen.conf ${CMAKE_SOURCE_DIR}/doc/iri_doc/)