test(file): timestamp rotation retention

tests/file_logger_rotation_naming_timestamp_retention_test.cpp

@@ -0,0 +1,63 @@
+#include <LogIt.hpp>
+#include <regex>
+#include <string>
+#include <vector>
+#include <algorithm>
+#if __cplusplus >= 201703L
+#include <filesystem>
+#else
+#include <cstdlib>
+#endif
+
+int main() {
+#if __cplusplus >= 201703L
+    std::filesystem::remove_all(logit::get_exec_dir() + "/rotation_ts_ret");
+#else
+#ifdef _WIN32
+    std::string clean = logit::get_exec_dir() + "\\rotation_ts_ret";
+    std::string cmd = "rmdir /s /q \"" + clean + "\"";
+#else
+    std::string clean = logit::get_exec_dir() + "/rotation_ts_ret";
+    std::string cmd = "rm -rf \"" + clean + "\"";
+#endif
+    std::system(cmd.c_str());
+#endif
+    const std::string dir = logit::get_exec_dir() + "/rotation_ts_ret";
+    logit::FileLogger::Config cfg;
+    cfg.directory = "rotation_ts_ret";
+    cfg.max_file_size_bytes = 20;
+    cfg.max_rotated_files = 2;
+    cfg.naming = logit::RotationNaming::Timestamp;
+    logit::Logger::get_instance().add_logger(
+        std::unique_ptr<logit::FileLogger>(new logit::FileLogger(cfg)),
+        std::unique_ptr<logit::SimpleLogFormatter>(new logit::SimpleLogFormatter("%v")));
+    const std::string msg = "0123456789";
+    LOGIT_INFO(msg);
+    LOGIT_INFO(msg);
+    LOGIT_INFO(msg);
+    LOGIT_INFO(msg);
+    LOGIT_INFO(msg);
+    LOGIT_INFO(msg);
+    LOGIT_WAIT();
+    LOGIT_SHUTDOWN();
+    std::vector<std::string> files = logit::get_list_files(dir);
+    std::regex re_idx("^\\d{4}-\\d{2}-\\d{2}_(\\d{6})\\.(\\d+)\\.log$");
+    std::regex re_base("^\\d{4}-\\d{2}-\\d{2}_\\d{6}\\.log$");
+    std::vector<std::string> rotated;
+    std::string base_ts;
+    for (const auto& path : files) {
+        std::string name = path.substr(path.find_last_of("/\\") + 1);
+        if (std::regex_match(name, re_base)) return 1;
+        std::smatch m;
+        if (std::regex_match(name, m, re_idx)) {
+            if (base_ts.empty()) base_ts = m.str(1);
+            else if (base_ts != m.str(1)) return 1;
+            rotated.push_back(name);
+        }
+    }
+    if (rotated.size() != 2) return 1;
+    std::sort(rotated.begin(), rotated.end());
+    if (rotated[0].find(".1.log") == std::string::npos) return 1;
+    if (rotated[1].find(".2.log") == std::string::npos) return 1;
+    return 0;
+}