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

README.md

@@ -17,7 +17,7 @@ Provides injectable Filesystem and Network resources to make code more testable.
 - [x] `std::fs::remove_dir` - `dir(path).remove()` - Removes an empty directory.
 - [x] `std::fs::remove_dir_all` - `dir(path).remove_all()` - Removes a directory at this path, after removing all its contents. Use carefully!
 - [x] `std::fs::remove_file` - `file(path).remove()` - Removes a file from the filesystem.
-- [ ] `std::fs::rename` - `path(path).rename()` - Rename a file or directory to a new name, replacing the original file if to already exists.
+- [x] `std::fs::rename` - `path(path).rename()` - Rename a file or directory to a new name, replacing the original file if to already exists.
 - [ ] `std::fs::set_permissions` - `path(path).set_permissions()` - Changes the permissions found on a file or a directory.
 - [ ] `std::fs::symlink_metadata` - `link(path).metadata()` - Query the metadata about a file without following symlinks.
 - [x] `std::fs::write` - `file(path).write()` - Write a slice as the entire contents of a file.

src/fs/dir.rs

@@ -1,7 +1,7 @@
 //
 use crate::fs::{DirItem, DirItemIterator, Result};
 
-use super::{DirHandle, Error, FileHandle, PathHandle};
+use super::{DirHandle, Error, FileHandle, PathHandle, PathMarker};
 
 impl<'base, 'path> DirHandle<'base, 'path> {
     /// Creates a new, empty directory at the path
@@ -93,10 +93,12 @@ impl<'base, 'path> DirHandle<'base, 'path> {
         std::fs::remove_dir_all(self.as_pathbuf()).map_err(Error::Io)
     }
 }
-impl<'base, 'path> TryFrom<PathHandle<'base, 'path>> for FileHandle<'base, 'path> {
+impl<'base, 'path> TryFrom<PathHandle<'base, 'path, PathMarker>> for FileHandle<'base, 'path> {
     type Error = crate::fs::Error;
 
-    fn try_from(path: PathHandle<'base, 'path>) -> std::result::Result<Self, Self::Error> {
+    fn try_from(
+        path: PathHandle<'base, 'path, PathMarker>,
+    ) -> std::result::Result<Self, Self::Error> {
         match path.as_file() {
             Ok(Some(dir)) => Ok(dir.clone()),
             Ok(None) => Err(crate::fs::Error::NotADirectory {
@@ -106,10 +108,12 @@ impl<'base, 'path> TryFrom<PathHandle<'base, 'path>> for FileHandle<'base, 'path
         }
     }
 }
-impl<'base, 'path> TryFrom<PathHandle<'base, 'path>> for DirHandle<'base, 'path> {
+impl<'base, 'path> TryFrom<PathHandle<'base, 'path, PathMarker>> for DirHandle<'base, 'path> {
     type Error = crate::fs::Error;
 
-    fn try_from(path: PathHandle<'base, 'path>) -> std::result::Result<Self, Self::Error> {
+    fn try_from(
+        path: PathHandle<'base, 'path, PathMarker>,
+    ) -> std::result::Result<Self, Self::Error> {
         match path.as_dir() {
             Ok(Some(dir)) => Ok(dir.clone()),
             Ok(None) => Err(crate::fs::Error::NotADirectory {

src/fs/path.rs

@@ -203,9 +203,41 @@ impl<'base, 'path, T: PathType> PathReal<'base, 'path, T> {
             Ok(None)
         }
     }
+
+    /// Renames a path.
+    ///
+    /// Wrapper for [std::fs::rename]
+    ///
+    /// ```
+    /// # use kxio::fs::Result;
+    /// # fn main() -> Result<()> {
+    /// let fs = kxio::fs::temp()?;
+    /// let src_path = fs.base().join("foo");
+    /// let src = fs.file(&src_path);
+    /// # src.write("bar")?;
+    /// let dst_path = fs.base().join("bar");
+    /// let dst = fs.file(&dst_path);
+    /// src.rename(&dst)?;
+    /// #    Ok(())
+    /// # }
+    /// ```
+    pub fn rename(&self, dest: &PathHandle<'base, 'path, T>) -> Result<()> {
+        self.check_error()?;
+        std::fs::rename(self.as_pathbuf(), dest.as_pathbuf()).map_err(Error::Io)
+    }
 }
-impl<'base, 'path> From<PathHandle<'base, 'path>> for PathBuf {
+impl<'base, 'path> From<PathHandle<'base, 'path, PathMarker>> for PathBuf {
     fn from(path: PathReal<PathMarker>) -> Self {
         path.base.join(path.path)
     }
 }
+impl<'base, 'path> From<DirHandle<'base, 'path>> for PathHandle<'base, 'path, PathMarker> {
+    fn from(dir: DirHandle<'base, 'path>) -> Self {
+        PathReal::new(dir.base, dir.path)
+    }
+}
+impl<'base, 'path> From<FileHandle<'base, 'path>> for PathHandle<'base, 'path, PathMarker> {
+    fn from(file: FileHandle<'base, 'path>) -> Self {
+        PathReal::new(file.base, file.path)
+    }
+}

src/fs/system.rs

@@ -3,7 +3,10 @@ use std::path::{Path, PathBuf};
 
 use crate::fs::{Error, Result};
 
-use super::path::{DirMarker, FileMarker, PathMarker, PathReal};
+use super::{
+    path::{DirMarker, FileMarker, PathReal},
+    PathMarker,
+};
 
 /// Represents to base of a section of a file system.
 #[derive(Clone, Debug)]
@@ -18,7 +21,7 @@ pub type DirHandle<'base, 'path> = PathReal<'base, 'path, DirMarker>;
 pub type FileHandle<'base, 'path> = PathReal<'base, 'path, FileMarker>;
 
 /// Represents a path in the filesystem.
-pub type PathHandle<'base, 'path> = PathReal<'base, 'path, PathMarker>;
+pub type PathHandle<'base, 'path, T> = PathReal<'base, 'path, T>;
 
 impl FileSystem {
     pub const fn new(base: PathBuf) -> Self {
@@ -121,7 +124,10 @@ impl FileSystem {
     /// # Ok(())
     /// # }
     /// ```
-    pub fn path<'base, 'path>(&'base self, path: &'path Path) -> PathHandle<'base, 'path> {
+    pub fn path<'base, 'path>(
+        &'base self,
+        path: &'path Path,
+    ) -> PathHandle<'base, 'path, PathMarker> {
         PathReal::new(self.base(), path)
     }
 

tests/fs.rs

@@ -448,6 +448,40 @@ mod path_is_file {
         Ok(())
     }
 }
+mod path_rename {
+    use super::*;
+    #[test]
+    fn should_rename_a_file() -> TestResult {
+        let fs = fs::temp().expect("temp fs");
+        let src_path = fs.base().join("foo");
+        let src = fs.file(&src_path);
+        src.write("bar").expect("write");
+        let src_contents = src.reader().expect("reader").to_string();
+        let dst_path = fs.base().join("bar");
+        let dst = fs.file(&dst_path);
+        src.rename(&dst).expect("rename");
+        let dst_contents = dst.reader().expect("reader").to_string();
+        assert_eq!(src_contents, dst_contents);
+        let src_exists = src.exists().expect("exists");
+        assert!(!src_exists);
+
+        Ok(())
+    }
+
+    #[test]
+    fn should_fail_on_path_traversal() -> TestResult {
+        let fs = fs::temp().expect("temp fs");
+        let src_path = fs.base().join("..").join("foo");
+        let_assert!(
+            Err(fs::Error::PathTraversal {
+                base: _base,
+                path: _path
+            }) = fs.file(&src_path).rename(&fs.file(&src_path))
+        );
+
+        Ok(())
+    }
+}
 mod copy {
     use super::*;
     #[test]