larra/tests/main.cpp

#include <gtest/gtest.h>
#include <spdlog/spdlog.h>

#include <boost/program_options.hpp>
#include <exception>
#include <print>
#include <stdexcept>

// clang-format off
constexpr auto ToString(spdlog::level::level_enum e) {
  switch (e) {
    case spdlog::level::trace: return "TRACE";
    case spdlog::level::debug: return "DEBUG";
    case spdlog::level::info: return "INFO";
    case spdlog::level::warn: return "WARNING";
    case spdlog::level::err: return "ERROR";
    case spdlog::level::critical: return "CRITICAL";
    case spdlog::level::off: return "OFF";
    default:
      return "INVALID";
  }
}
// clang-format on

namespace po = boost::program_options;

auto main(int argc, char** argv) -> int {
  ::testing::InitGoogleTest(&argc, argv);

  // Define options
  po::options_description desc("Allowed options");
  desc.add_options()("help,h", "Print help message")("log_level,l",
                                                     po::value<int>()->default_value(SPDLOG_LEVEL_OFF),
                                                     "Set log level: 0=TRACE, 1=DEBUG, 2=INFO, 3=WARN, 4=ERROR, 5=CRITICAL, 6=OFF");

  // Parse command-line arguments
  po::variables_map vm;
  try {
    po::store(po::parse_command_line(argc, argv, desc), vm);
    po::notify(vm);

    if(vm["log_level"].as<int>() < spdlog::level::level_enum::trace || vm["log_level"].as<int>() > spdlog::level::level_enum::off) {
      throw std::invalid_argument{
          std::format("Invalid argument value for '--log_level' option. Check option description for more details")};
    }
    if(vm["log_level"].as<int>() < SPDLOG_ACTIVE_LEVEL) {
      SPDLOG_WARN("Specified log_level '{}' is lower than max available one '{}'. Log level will be changed according to the maximum one",
                  vm["log_level"].as<int>(),
                  SPDLOG_ACTIVE_LEVEL);
    }
  } catch(const std::exception& e) {
    SPDLOG_CRITICAL("Cmd parse error: {}", e.what());
    return 1;
  }

  // Cmd options handling
  auto level = static_cast<spdlog::level::level_enum>(vm["log_level"].as<int>());
  spdlog::set_level(level);
  if(level != spdlog::level::level_enum::off) {
    std::println("\nEnvironment setup:\n\tCurrently set log level: {}\n", ToString(spdlog::get_level()));
  }
  return RUN_ALL_TESTS();
}