added a very simple GTest Example

CMakeLists.txt

@@ -2,7 +2,11 @@ cmake_minimum_required(VERSION 3.8)
 #including macroses
 include(cmake/SetBoostEnv.cmake)
 include(cmake/SetNlohmannEnv.cmake)
+include(cmake/SetGTest.cmake)
+
 add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/aruco)
 add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/OSLabDetector)
 add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/ccalib) 
 add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/ccalibTool)
+add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tst_src)
+add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tst)

cmake/SetGTest.cmake

+
+include ( $ENV{PREPARE_ENV_DIR}/googleTest/lib/cmake/GTest/GTestConfig.cmake)
\ No newline at end of file

tst/CMakeLists.txt

+set(TARGET TestExample_test)
+
+file(GLOB_RECURSE TEST_SOURCES LIST_DIRECTORIES false *.h *.cpp)
+
+set(SOURCES ${TEST_SOURCES})
+
+add_executable(${TARGET} ${TEST_SOURCES})
+
+add_test(NAME ${TARGET} COMMAND ${TARGET})
+
+set(GTEST_ROOT $ENV{PREPARE_ENV_DIR}/googleTest )
+find_package(GTest REQUIRED)
+
+target_include_directories (${TARGET} PRIVATE ${GTEST_INCLUDE_DIR})
+target_include_directories (${TARGET} PRIVATE ${CMAKE_CURRENT_LIST_DIR}/../tst_src)
+
+target_link_libraries(${TARGET}  TestSource_lib ${GTEST_BOTH_LIBRARIES})
\ No newline at end of file

tst/FormulaTest.cpp

+#include "gtest/gtest.h"
+#include "Formula.h"
+
+TEST(blaTest, test1) {
+    //arrange
+    //act
+    //assert
+    EXPECT_EQ (Formula::bla (0),  0);
+    EXPECT_EQ (Formula::bla (10), 20);
+    EXPECT_EQ (Formula::bla (50), 100);
+}
\ No newline at end of file

tst/main.cpp

+#include "gtest/gtest.h"
+
+int main(int argc, char **argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}
\ No newline at end of file

tst_src/CMakeLists.txt

+set(TARGET TestSource)
+
+file(GLOB_RECURSE SOURCES LIST_DIRECTORIES true *.h *.cpp)
+
+set(SOURCES ${SOURCES})
+
+add_executable(${TARGET}_run ${SOURCES})
+add_library(${TARGET}_lib STATIC ${SOURCES})
+
+set(${TARGET}_lib ${TARGET}_lib PARENT_SCOPE)

tst_src/Formula.cpp

+#include "Formula.h"
+
+int Formula::bla(int arg1) {
+    return arg1 * 2;
+}
\ No newline at end of file

tst_src/Formula.h

+#ifndef EXAMPLEPROJECT_FORMULA_H
+#define EXAMPLEPROJECT_FORMULA_H
+
+class Formula {
+public:
+    static int bla(int arg1);
+};
+
+#endif //EXAMPLEPROJECT_FORMULA_H
\ No newline at end of file

tst_src/main.cpp

+#include <iostream>
+#include "Formula.h"
+
+int main() {
+    std::cout << "Bla: " << Formula::bla(2) << std::endl;
+    return 0;
+}
\ No newline at end of file