Function read_json

tests/cpp_validation_tests/test_validation.cpp:49–54

using nlohmann::json;

auto read_json(std::filesystem::path const& path) {
    json j;
    std::ifstream f{path};
    f >> j;
    return j;
}

template <typename T> std::string get_as_string(T const& attribute_value) {
    std::stringstream sstr;