The package gtest is compatible with built-in CMake targets:

    enable_testing()
    
    find_package(GTest MODULE REQUIRED)
    target_link_libraries(main PRIVATE GTest::GTest GTest::Main)
    
    find_package(GMock CONFIG REQUIRED)
    target_link_libraries(main PRIVATE GMock::gmock GMock::gmock_main)
    
    add_test(AllTestsInMain main)