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use serde::Deserialize;use std::path::{Path, PathBuf};
#[derive(Clone, Debug, Deserialize, Eq, PartialEq)]pub enum SourceType {  #[serde(rename = "js")]  JS,  #[serde(rename = "jsx")]  JSX,  #[serde(rename = "ts")]  TS,  #[serde(rename = "tsx")]  TSX,  #[serde(rename = "??")]  Unknown,}
impl<'a> From<&'a Path> for SourceType {  fn from(path: &'a Path) -> Self {    SourceType::from_path(path)  }}
impl<'a> From<&'a PathBuf> for SourceType {  fn from(path: &'a PathBuf) -> Self {    SourceType::from_path(path)  }}
impl<'a> From<&'a String> for SourceType {  fn from(specifier: &'a String) -> Self {    SourceType::from_path(&PathBuf::from(specifier))  }}
impl Default for SourceType {  fn default() -> Self {    SourceType::Unknown  }}
impl SourceType {  fn from_path(path: &Path) -> Self {    match path.extension() {      None => SourceType::Unknown,      Some(os_str) => match os_str.to_str() {        Some("ts") => SourceType::TS,        Some("tsx") => SourceType::TSX,        Some("mjs") => SourceType::JS,        Some("js") => SourceType::JS,        Some("jsx") => SourceType::JSX,        _ => SourceType::Unknown,      },    }  }}
#[cfg(test)]mod tests {  use super::*;
  #[test]  fn map_file_extension() {    assert_eq!(SourceType::from(Path::new("/foo/bar.ts")), SourceType::TS);    assert_eq!(SourceType::from(Path::new("/foo/bar.tsx")), SourceType::TSX);    assert_eq!(SourceType::from(Path::new("/foo/bar.js")), SourceType::JS);    assert_eq!(SourceType::from(Path::new("/foo/bar.mjs")), SourceType::JS);    assert_eq!(SourceType::from(Path::new("/foo/bar.jsx")), SourceType::JSX);    assert_eq!(      SourceType::from(Path::new("/foo/bar.txt")),      SourceType::Unknown    );    assert_eq!(SourceType::from(Path::new("/foo/bar")), SourceType::Unknown);  }}