Cannot find source file: value_function.cpp

[linrongbin16]

tests/CMakeLists.txt report error:

CMake Error at tests/CMakeLists.txt:16 (add_executable): Cannot find source file:

value_function.cpp

Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp .hxx .in .txx

CMake Error: CMake can not determine linker language for target: value_function CMake Error: Cannot determine link language for target "value_function".

There's no such file "value_function.cpp" in tests