Concept definition

template<class T>
concept sequoia::testing::concrete_test = 
        requires (T& test){
          { test.run_tests() };
          { test.source_file() } -> std::convertible_to<std::filesystem::path>;
          { test.reset_results() };
        }
    && std::derived_from<T, test_base> && std::movable<T> && std::destructible<T>