fn test_annotate_from_file_info() {
    let path;
    let path_linux = String::from("/var/log/pods/sandbox0-ns_sandbox0-name_sandbox0-uid/sandbox0-container0-name/1.log");
    let path_windows = String::from("/var\\log\\pods\\sandbox0-ns_sandbox0-name_sandbox0-uid\\sandbox0-container0-name\\1.log");

    let os = std::env::consts::OS;

    if os == "windows" {
        path = path_windows;
    } else {
        path = path_linux;
    }

    let cases = vec![(
        FieldsSpec::default(),
        path,
        {
            let mut log = LogEvent::default();
            log.insert(event_path!("kubernetes", "container_name"), "sandbox0-container0-name");
            log
        },
        LogNamespace::Legacy,
    ),(
        FieldsSpec{
            container_name: OwnedTargetPath::event(owned_value_path!("container_name")).into(),
            ..Default::default()
        },
        path,
        {
            let mut log = LogEvent::default();
            log.insert(event_path!("container_name"), "sandbox0-container0-name");
            log
        },
        LogNamespace::Legacy,
    )];

    for (fields_spec, file, expected, log_namespace) in cases.into_iter() {
        let mut log = LogEvent::default();
        let file_info = parse_log_file_path(file).unwrap();
        annotate_from_file_info(&mut log, &fields_spec, &file_info, log_namespace);
        assert_eq!(log, expected);
    }
}`

let path = ["var", "log", (etc)].iter().collect::<PathBuf>()