#[cfg(test)]
mod tests {
    use super::*;
    #[test]
    fn extract_tags() {
        let contents = "\
tags: C/C++, code, algorithms
";
        // XXX: no file operations for the simple tasks
        assert_eq!(vec!["C/C++", "code", "algorithms"], get_tags(contents));
    }
}
pub fn get_tags(content: &str) -> Vec<&str> {
    vec![""; 3]
}