fix(logging): add logging namespace and create logging::init method (#2336)

tests/unit/test_logging.cpp

@@ -0,0 +1,75 @@
+/**
+ * @file tests/test_logging.cpp
+ * @brief Test src/logging.*.
+ */
+#include <fstream>
+
+#include <src/logging.h>
+
+#include <tests/conftest.cpp>
+
+class LoggerInitTest: public virtual BaseTest, public ::testing::WithParamInterface<int> {
+protected:
+  void
+  SetUp() override {
+    BaseTest::SetUp();
+  }
+
+  void
+  TearDown() override {
+    BaseTest::TearDown();
+  }
+};
+INSTANTIATE_TEST_SUITE_P(
+  LogLevel,
+  LoggerInitTest,
+  ::testing::Values(
+    0,
+    1,
+    2,
+    3,
+    4,
+    5));
+TEST_P(LoggerInitTest, InitLogging) {
+  int logLevel = GetParam();
+  std::string logFilePath = "test_log_" + std::to_string(logLevel) + ".log";
+
+  // deinit the BaseTest logger
+  BaseTest::deinit_guard.reset();
+
+  auto log_deinit = logging::init(logLevel, logFilePath);
+  if (!log_deinit) {
+    FAIL() << "Failed to initialize logging";
+  }
+}
+
+TEST(LogFlushTest, CheckLogFile) {
+  // Write a log message
+  BOOST_LOG(info) << "Test message";
+
+  // Call log_flush
+  logging::log_flush();
+
+  // Check the contents of the log file
+  std::ifstream log_file("test.log");
+  std::string line;
+  bool found = false;
+  while (std::getline(log_file, line)) {
+    if (line.find("Test message") != std::string::npos) {
+      found = true;
+      break;
+    }
+  }
+
+  EXPECT_TRUE(found);
+}
+
+TEST(PrintHelpTest, CheckOutput) {
+  std::string name = "test";
+  logging::print_help(name.c_str());
+
+  std::string output = cout_buffer.str();
+
+  EXPECT_NE(output.find("Usage: " + name), std::string::npos);
+  EXPECT_NE(output.find("--help"), std::string::npos);
+}