added tests in cmake

CMakeLists.txt

@@ -11,9 +11,9 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 add_library(${PROJECT_NAME} INTERFACE)
 
 target_include_directories(${PROJECT_NAME} INTERFACE ${${PROJECT_NAME}_SOURCE_DIR})
-
+enable_testing()
+add_subdirectory(samples)
 add_subdirectory(tests)
 
-add_subdirectory(samples)
 
 install(TARGETS circularbuffer DESTINATION lib)

tests/CMakeLists.txt

@@ -1,14 +1,41 @@
 cmake_minimum_required(VERSION 3.13)
 
-message(STATUS "cmake in tests, project name ${PROJECT_NAME}" )
-
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-add_executable(test_circularbuffer_int test_circularbuffer_int.cpp)
-target_link_libraries(test_circularbuffer_int
-					  PRIVATE
+message(STATUS "cmake in tests, project name ${PROJECT_NAME}" )
+
+configure_file(CMakeLists.txt.in googletest-download/CMakeLists.txt)
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+			    RESULT_VARIABLE result
+    			WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download
+				)
+if(result)
+	message(FATAL_ERROR "CMake step for googletest failed: ${result}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+			    RESULT_VARIABLE result
+		  		WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download
+				)
+
+if(result)
+	message(FATAL_ERROR "Build step for googletest failed: ${result}")
+endif()
+
+# Prevent overriding the parent project's compiler/linker
+# settings on Windows
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+
+# Add googletest directly to our build. This defines
+# the gtest and gtest_main targets.
+add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src
+                 ${CMAKE_CURRENT_BINARY_DIR}/googletest-build
+				 EXCLUDE_FROM_ALL)
+
+add_executable(circularbuffer_int circularbuffer_int.cpp)
+target_link_libraries(circularbuffer_int
 					  circularbuffer
-					  /usr/local/lib/libgtest.a
-					  pthread
+					  gtest_main
 					  )
+add_test(NAME test_circularbuffer_int COMMAND circularbuffer_int)

tests/CMakeLists.txt.in

@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.13)
+
+project(googletest-download NONE)
+
+include(ExternalProject)
+ExternalProject_Add(googletest
+					GIT_REPOSITORY    https://github.com/google/googletest.git
+    				GIT_TAG           master
+	  				SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-src"
+	    			BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-build"
+		  			CONFIGURE_COMMAND ""
+		    		BUILD_COMMAND     ""
+			  		INSTALL_COMMAND   ""
+			    	TEST_COMMAND      ""
+					)

tests/test_circularbuffer_int.cpp → tests/circularbuffer_int.cpp

@@ -90,9 +90,4 @@ TEST_F(CircularBufferTest, PushAndPopTest){
 }
 
 
-int main(int argc, char *argv[])
-{   
-
-	::testing::InitGoogleTest(&argc, argv);
-	return RUN_ALL_TESTS();
-}
+