sunshine-sdk/tests/unit/test_logging.cpp

/**
 * @file tests/unit/test_logging.cpp
 * @brief Test src/logging.*.
 */
#include <src/logging.h>

#include "../tests_common.h"

#include <fstream>
#include <random>

namespace {
  std::array log_levels = {
    std::tuple("verbose", &verbose),
    std::tuple("debug", &debug),
    std::tuple("info", &info),
    std::tuple("warning", &warning),
    std::tuple("error", &error),
    std::tuple("fatal", &fatal),
  };

  constexpr auto log_file = "test_sunshine.log";
}  // namespace

struct LogLevelsTest: testing::TestWithParam<decltype(log_levels)::value_type> {};

INSTANTIATE_TEST_SUITE_P(
  Logging,
  LogLevelsTest,
  testing::ValuesIn(log_levels),
  [](const auto &info) { return std::string(std::get<0>(info.param)); });

TEST_P(LogLevelsTest, PutMessage) {
  auto [label, plogger] = GetParam();
  ASSERT_TRUE(plogger);
  auto &logger = *plogger;

  std::random_device rand_dev;
  std::mt19937_64 rand_gen(rand_dev());
  auto test_message = std::to_string(rand_gen()) + std::to_string(rand_gen());
  BOOST_LOG(logger) << test_message;

  // Flush logger and search for the message in the log file

  logging::log_flush();

  std::ifstream input(log_file);
  ASSERT_TRUE(input.is_open());

  bool found = false;
  for (std::string line; std::getline(input, line);) {
    if (line.find(test_message) != std::string::npos) {
      // Assume that logger may change the case of log level label
      std::transform(line.begin(), line.end(), line.begin(),
        [](char c) { return std::tolower(c); });

      if (line.find(label) != std::string::npos) {
        found = true;
        break;
      }
    }
  }
  ASSERT_TRUE(found);
}