mezzaluna_load_path/rubylib.rs
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use std::env;
use std::ffi::OsStr;
use std::path::PathBuf;
/// A Ruby load path builder that reads from the `RUBYLIB` environment variable.
///
/// MRI Ruby allows manipulating the [require] search path by setting the
/// `RUBYLIB` environment variable before launching the Ruby CLI. The `RUBYLIB`
/// variable is read on start-up and is expected to contain a platform-native
/// path separator-delimited list of file system paths.
///
/// The `RUBYLIB` environment variable or other sequence of paths is parsed when
/// this loader is created and is immutable. This builder is intended to be
/// called during interpreter boot.
///
/// Paths earlier in the sequence returned from [`load_path`] have higher
/// priority.
///
/// ```no_run
/// use std::ffi::OsStr;
/// use std::path::Path;
/// use mezzaluna_load_path::Rubylib;
///
/// # #[cfg(unix)]
/// # fn example() -> Option<()> {
/// // Grab the load paths from the `RUBYLIB` environment variable. If the
/// // variable is empty or unset, `None` is returned.
/// let env_loader = Rubylib::new()?;
///
/// // Search `/home/artichoke/src` first, only attempting to search
/// // `/usr/share/artichoke` if no file is found in `/home/artichoke/src`.
/// let fixed_loader = Rubylib::with_rubylib(
/// OsStr::new("/home/artichoke/src:/usr/share/artichoke:./_lib"),
/// )?;
/// # Some(())
/// # }
/// # #[cfg(unix)]
/// # example().unwrap();
/// ```
///
/// [require]: https://ruby-doc.org/core-3.1.2/Kernel.html#method-i-require
/// [`load_path`]: Self::load_path
#[derive(Default, Debug, Clone, PartialEq, Eq)]
#[cfg_attr(docsrs, doc(cfg(feature = "rubylib")))]
pub struct Rubylib {
/// Fixed set of paths on the host file system to search for Ruby sources.
///
/// These load paths are loaded once and are immutable once loaded.
load_path: Box<[PathBuf]>,
}
impl Rubylib {
/// Create a new load path builder that reads from the `RUBYLIB` environment
/// variable.
///
/// The `RUBYLIB` environment variable is read only once at the time this
/// method is called. The resolved load path is immutable.
///
/// This method returns [`None`] if there are errors resolving the
/// `RUBYLIB` environment variable, if the `RUBYLIB` environment variable is
/// not set, or if the given `RUBYLIB` environment variable only contains
/// empty paths.
///
/// # Examples
///
/// ```no_run
/// use mezzaluna_load_path::Rubylib;
///
/// # fn example() -> Option<()> {
/// let loader = Rubylib::new()?;
/// # Some(())
/// # }
/// # example().unwrap();
/// ```
#[must_use]
pub fn new() -> Option<Self> {
let rubylib = env::var_os("RUBYLIB")?;
Self::with_rubylib(&rubylib)
}
/// Create a new load path builder that reads from the given [`OsStr`].
///
/// The `rubylib` platform string given to this method is expected to be a
/// [path string] of file system paths that are delimited by the platform
/// path separator.
///
/// The resolved load path is immutable.
///
/// This method returns [`None`] if the given `rubylib` argument only
/// contains empty paths.
/// non-empty paths.
///
/// # Examples
///
/// ```
/// use std::ffi::OsStr;
/// use mezzaluna_load_path::Rubylib;
///
/// # #[cfg(unix)]
/// # fn example() -> Option<()> {
/// let loader = Rubylib::with_rubylib(OsStr::new("/home/artichoke/src:/usr/share/artichoke:_lib"))?;
/// # Some(())
/// # }
/// # #[cfg(unix)]
/// # example().unwrap();
/// ```
///
/// An empty path string returns [`None`].
///
/// ```
/// use std::ffi::OsStr;
/// use mezzaluna_load_path::Rubylib;
///
/// let loader = Rubylib::with_rubylib(OsStr::new(""));
/// assert!(loader.is_none());
///
/// # #[cfg(unix)]
/// let loader = Rubylib::with_rubylib(OsStr::new("::::"));
/// # #[cfg(unix)]
/// assert!(loader.is_none());
/// ```
///
/// [path string]: env::split_paths
#[must_use]
pub fn with_rubylib(rubylib: &OsStr) -> Option<Self> {
// Empty paths are filtered out of RUBYLIB.
//
// `std::env::split_paths` yields empty paths as of Rust 1.69.0.
// See: https://github.com/rust-lang/rust/issues/111832
let load_path = env::split_paths(rubylib)
.filter(|p| !p.as_os_str().is_empty())
.collect::<Box<[_]>>();
// If the `RUBYLIB` env variable is empty or otherwise results in no
// search paths being resolved, return `None` so the `Rubylib` loader is
// not used.
if load_path.is_empty() {
return None;
}
Some(Self { load_path })
}
/// Return a reference to the paths in `$LOAD_PATH` parsed by this builder.
///
/// Because the paths in `RUBYLIB` have the highest priority when loading
/// features, the returned paths should appear first in `$LOAD_PATH`.
///
/// # Examples
///
/// ```
/// use std::ffi::OsStr;
/// use std::path::Path;
/// use mezzaluna_load_path::Rubylib;
///
/// # #[cfg(unix)]
/// # fn example() -> Option<()> {
/// let loader = Rubylib::with_rubylib(
/// OsStr::new("/home/artichoke/src:/usr/share/artichoke:_lib"),
/// )?;
/// assert_eq!(
/// loader.load_path(),
/// &[
/// Path::new("/home/artichoke/src"),
/// Path::new("/usr/share/artichoke"),
/// Path::new("_lib"),
/// ]
/// );
/// # Some(())
/// # }
/// # #[cfg(unix)]
/// # example().unwrap();
/// ```
#[inline]
#[must_use]
pub fn load_path(&self) -> &[PathBuf] {
&self.load_path
}
/// Consume this loader and return its `$LOAD_PATH`.
///
/// Because the paths in `RUBYLIB` have the highest priority when loading
/// features, the returned paths should appear first in `$LOAD_PATH`.
///
/// # Examples
///
/// ```
/// use std::ffi::OsStr;
/// use std::path::Path;
/// use mezzaluna_load_path::Rubylib;
///
/// # #[cfg(unix)]
/// # fn example() -> Option<()> {
/// let loader = Rubylib::with_rubylib(
/// OsStr::new("/home/artichoke/src:/usr/share/artichoke:_lib"),
/// )?;
///
/// let load_paths = loader.into_load_path();
/// assert_eq!(
/// load_paths,
/// [
/// Path::new("/home/artichoke/src"),
/// Path::new("/usr/share/artichoke"),
/// Path::new("_lib"),
/// ]
/// );
/// # Some(())
/// # }
/// # #[cfg(unix)]
/// # example().unwrap();
/// ```
#[inline]
#[must_use]
pub fn into_load_path(self) -> Vec<PathBuf> {
self.load_path.into()
}
}
#[cfg(all(test, unix))]
mod tests {
use std::env;
use std::ffi::OsStr;
use std::path::Path;
use super::*;
#[test]
fn with_rubylib_env_var() {
env::remove_var("RUBYLIB");
let loader = Rubylib::new();
assert!(loader.is_none());
env::set_var("RUBYLIB", "");
let loader = Rubylib::new();
assert!(loader.is_none());
env::set_var("RUBYLIB", "/home/artichoke/src:/usr/share/artichoke:_lib");
let loader = Rubylib::new().unwrap();
assert_eq!(loader.load_path().len(), 3);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 3);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
}
#[test]
fn test_load_path_is_set_on_construction() {
let loader = Rubylib::with_rubylib(OsStr::new("/home/artichoke/src:/usr/share/artichoke:_lib")).unwrap();
assert_eq!(loader.load_path().len(), 3);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 3);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
}
#[test]
fn test_empty_rubylib_is_none() {
let loader = Rubylib::with_rubylib(OsStr::new(""));
assert!(loader.is_none());
}
#[test]
fn test_empty_rubylib_paths_are_filtered() {
// ```console
// $ ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// $ RUBYLIB= ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// $ RUBYLIB=::: ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// ```
let loader = Rubylib::with_rubylib(OsStr::new(":::::::::::::::::"));
assert!(loader.is_none());
let loader =
Rubylib::with_rubylib(OsStr::new(":::/home/artichoke/src:::/usr/share/artichoke:::_lib:::")).unwrap();
assert_eq!(loader.load_path().len(), 3);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 3);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
}
#[test]
fn test_paths_taken_verbatim() {
// Relative paths are not resolved, duplicates are not removed, paths
// are not normalized:
//
// ```console
// $ RUBYLIB=.:.:`pwd`:`pwd`:/Users/:/Users ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// .
// .
// /Users/lopopolo/dev/artichoke/artichoke
// /Users/lopopolo/dev/artichoke/artichoke
// /Users/
// /Users
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// ```
let loader = Rubylib::with_rubylib(OsStr::new(
".:.:/Users/lopopolo/dev/artichoke/artichoke:/Users/lopopolo/dev/artichoke/artichoke:/Users/:/Users",
))
.unwrap();
assert_eq!(loader.load_path().len(), 6);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(
iter.next().unwrap(),
Path::new("/Users/lopopolo/dev/artichoke/artichoke")
);
assert_eq!(
iter.next().unwrap(),
Path::new("/Users/lopopolo/dev/artichoke/artichoke")
);
assert_eq!(iter.next().unwrap(), Path::new("/Users/"));
assert_eq!(iter.next().unwrap(), Path::new("/Users"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 6);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(
iter.next().unwrap(),
Path::new("/Users/lopopolo/dev/artichoke/artichoke")
);
assert_eq!(
iter.next().unwrap(),
Path::new("/Users/lopopolo/dev/artichoke/artichoke")
);
assert_eq!(iter.next().unwrap(), Path::new("/Users/"));
assert_eq!(iter.next().unwrap(), Path::new("/Users"));
assert_eq!(iter.next(), None);
}
}
#[cfg(all(test, windows))]
mod tests {
use std::env;
use std::ffi::OsStr;
use std::path::Path;
use super::*;
#[test]
fn with_rubylib_env_var() {
env::remove_var("RUBYLIB");
let loader = Rubylib::new();
assert!(loader.is_none());
env::set_var("RUBYLIB", "");
let loader = Rubylib::new();
assert!(loader.is_none());
env::set_var("RUBYLIB", "c:/home/artichoke/src;c:/usr/share/artichoke;_lib");
let loader = Rubylib::new().unwrap();
assert_eq!(loader.load_path().len(), 3);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("c:/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("c:/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 3);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("c:/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("c:/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
}
#[test]
fn test_load_path_is_set_on_construction() {
let loader = Rubylib::with_rubylib(OsStr::new("c:/home/artichoke/src;c:/usr/share/artichoke;_lib")).unwrap();
assert_eq!(loader.load_path().len(), 3);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("c:/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("c:/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 3);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("c:/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("c:/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
}
#[test]
fn test_empty_rubylib_is_none() {
let loader = Rubylib::with_rubylib(OsStr::new(""));
assert!(loader.is_none());
}
#[test]
fn test_empty_rubylib_paths_are_filtered() {
// ```console
// $ ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// $ RUBYLIB= ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// $ RUBYLIB=::: ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// ```
let loader = Rubylib::with_rubylib(OsStr::new(";;;;;;;;;;;;;;;;"));
assert!(loader.is_none());
let loader = Rubylib::with_rubylib(OsStr::new(
";;;c:/home/artichoke/src;;;c:/usr/share/artichoke;;;_lib;;;",
))
.unwrap();
assert_eq!(loader.load_path().len(), 3);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("c:/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("c:/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 3);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("c:/home/artichoke/src"));
assert_eq!(iter.next().unwrap(), Path::new("c:/usr/share/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("_lib"));
assert_eq!(iter.next(), None);
}
#[test]
fn test_paths_taken_verbatim() {
// Relative paths are not resolved, duplicates are not removed, paths
// are not normalized:
//
// ```console
// $ RUBYLIB=.:.:`pwd`:`pwd`:/Users/:/Users ruby -e 'puts $:'
// /usr/local/Cellar/rbenv/1.2.0/rbenv.d/exec/gem-rehash
// .
// .
// /Users/lopopolo/dev/artichoke/artichoke
// /Users/lopopolo/dev/artichoke/artichoke
// /Users/
// /Users
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/site_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby/3.2.0/x86_64-darwin22
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/vendor_ruby
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0
// /usr/local/var/rbenv/versions/3.2.2/lib/ruby/3.2.0/x86_64-darwin22
// ```
let loader = Rubylib::with_rubylib(OsStr::new(
".;.;c:/lopopolo/dev/artichoke/artichoke;c:/lopopolo/dev/artichoke/artichoke;c:/var/;c:/var",
))
.unwrap();
assert_eq!(loader.load_path().len(), 6);
let mut iter = loader.load_path().iter();
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(iter.next().unwrap(), Path::new("c:/lopopolo/dev/artichoke/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("c:/lopopolo/dev/artichoke/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("c:/var/"));
assert_eq!(iter.next().unwrap(), Path::new("c:/var"));
assert_eq!(iter.next(), None);
let load_path = loader.into_load_path();
assert_eq!(load_path.len(), 6);
let mut iter = load_path.iter();
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(iter.next().unwrap(), Path::new("."));
assert_eq!(iter.next().unwrap(), Path::new("c:/lopopolo/dev/artichoke/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("c:/lopopolo/dev/artichoke/artichoke"));
assert_eq!(iter.next().unwrap(), Path::new("c:/var/"));
assert_eq!(iter.next().unwrap(), Path::new("c:/var"));
assert_eq!(iter.next(), None);
}
}