// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.

/// Gets the corresponding @types package for the provided package name.
pub fn types_package_name(package_name: &str) -> String {
  debug_assert!(!package_name.starts_with("@types/"));
  // Scoped packages will get two underscores for each slash
  // https://github.com/DefinitelyTyped/DefinitelyTyped/tree/15f1ece08f7b498f4b9a2147c2a46e94416ca777#what-about-scoped-packages
  format!("@types/{}", package_name.replace('/', "__"))
}

#[cfg(test)]
mod test {
  use super::types_package_name;

  #[test]
  fn test_types_package_name() {
    assert_eq!(types_package_name("name"), "@types/name");
    assert_eq!(
      types_package_name("@scoped/package"),
      "@types/@scoped__package"
    );
  }
}