Reporting test coverage to the CDash dashboard

The code for this recipe is available at https://github.com/dev-cafe/cmake-cookbook/tree/v1.0/chapter-14/recipe-02, and it includes a C++ example. The recipe is valid with CMake version 3.5 (and higher) and has been tested on GNU/Linux, macOS, and Windows.

In this recipe, we will measure the test coverage and report it to the CDash dashboard, where we will be able to browse the test coverage analysis line-by-line, in order to identify untested or unused code.

Getting ready

We will extend the source code of the previous recipe with a minor change in src/sum_integers.cpp, where we will add a function - sum_integers_unused:

#include "sum_integers.hpp"

#include <vector...