Allow to disable tests through BUILD_TESTING=OFF

Author: myd7349

CMakeLists.txt

@@ -1,7 +1,5 @@
 cmake_minimum_required(VERSION 3.0)
-project(linq)
-
-enable_testing()
+project(linq CXX)
 
 find_package(Boost)
 
@@ -37,6 +35,10 @@ install(FILES
 install(FILES linq.h DESTINATION include)
 install(DIRECTORY linq DESTINATION include)
 
-add_executable(linq-test test.cpp)
-target_link_libraries(linq-test linq ${Boost_test_LIBRARY_RELEASE})
-add_test(NAME linq-test COMMAND linq-test)
+include(CTest)
+
+if (BUILD_TESTING)
+    add_executable(linq-test test.cpp)
+    target_link_libraries(linq-test linq ${Boost_test_LIBRARY_RELEASE})
+    add_test(NAME linq-test COMMAND linq-test)
+endif (BUILD_TESTING)