feat(fs): add .path(path).canonicalize()

README.md

@@ -4,7 +4,7 @@ Provides injectable Filesystem and Network resources to make code more testable.
 
 #### std::fs alternatives
 
-- [ ] `std::fs::canonicalize` - `path(path).canonicalize()` - Returns the canonical, absolute form of a path with all intermediate components normalized and symbolic links resolved.
+- [x] `std::fs::canonicalize` - `path(path).canonicalize()` - Returns the canonical, absolute form of a path with all intermediate components normalized and symbolic links resolved.
 - [x] `std::fs::copy` - `file(path).copy(target)` - Copies the contents of one file to another. This function will also copy the permission bits of the original file to the destination file.
 - [x] `std::fs::create_dir` - `dir(path).create()` - Creates a new, empty directory at the provided path
 - [x] `std::fs::create_dir_all` - `dir(path).create_all()` - Recursively create a directory and all of its parent components if they are missing.

src/fs/path.rs

@@ -225,6 +225,25 @@ impl<'base, 'path, T: PathType> PathReal<'base, 'path, T> {
         self.check_error()?;
         std::fs::rename(self.as_pathbuf(), dest.as_pathbuf()).map_err(Error::Io)
     }
+
+    /// Returns the canonical, absolute form of the path with all intermediate
+    /// components normalized and symbolic links resolved.
+    ///
+    /// ```
+    /// # use kxio::fs::Result;
+    /// # fn main() -> Result<()> {
+    /// let fs = kxio::fs::temp()?;
+    /// let path = fs.base().join("foo");
+    /// #    fs.dir(&path).create()?;
+    /// let dir = fs.path(&path);
+    /// let canonical = dir.canonicalize()?;
+    /// #    Ok(())
+    /// # }
+    /// ```
+    pub fn canonicalize(&self) -> Result<PathBuf> {
+        self.check_error()?;
+        self.as_pathbuf().canonicalize().map_err(Error::Io)
+    }
 }
 impl<'base, 'path> From<PathHandle<'base, 'path, PathMarker>> for PathBuf {
     fn from(path: PathReal<PathMarker>) -> Self {

tests/fs.rs

@@ -580,3 +580,25 @@ mod dir {
         }
     }
 }
+mod canonicalize {
+    use std::path::Path;
+
+    use super::*;
+
+    #[test]
+    fn should_resolve_symlinks() -> TestResult {
+        let fs = fs::temp().expect("temp fs");
+        let path = fs.base().join("foo");
+        let file = fs.file(&path);
+        file.write("bar").expect("write");
+        let link_path = fs.base().join("link");
+        let link = fs.symlink(&link_path);
+        link.create_to(&file).expect("create");
+        let canonical = link.canonicalize().expect("canonicalize");
+        // macos puts all temp files under /private
+        let canonical = Path::new("/").join(canonical.strip_prefix("/private").unwrap());
+        assert_eq!(canonical, path);
+
+        Ok(())
+    }
+}