Struct CountingFileSystem 

pub struct CountingFileSystem { /* private fields */ }

Decorates the in-memory filesystem with algorithmic I/O counters. Tests assert call counts rather than elapsed time, so a loaded CI runner cannot turn a regression into a flaky budget failure.

Implementations

impl CountingFileSystem

pub fn new(inner: FakeFileSystem) -> Self

pub fn read_dir_calls(&self) -> usize

pub fn read_file_calls(&self) -> usize

Trait Implementations

impl FileSystemService for CountingFileSystem

fn read_dir(&self, path: &Path) -> FsResult<Vec<DirEntryInfo>>

List one directory level. Does not recurse — the tree is lazy (ADR-0005 §2).

fn read_file(&self, path: &Path) -> FsResult<Vec<u8>>

fn create_file(&self, path: &Path) -> FsResult<()>

Create an empty file. Errors with FsError::AlreadyExists rather than truncating.

fn write_file(&self, path: &Path, contents: &[u8]) -> FsResult<()>

Replace a file’s contents, creating it if absent.

fn create_dir(&self, path: &Path) -> FsResult<()>

Create a directory, including missing parents.

fn rename(&self, from: &Path, to: &Path) -> FsResult<()>

fn remove_file(&self, path: &Path) -> FsResult<()>

fn remove_dir_all(&self, path: &Path) -> FsResult<()>

Recursively delete a directory. Named for what it does: callers must confirm with the user (or hold an agent permission grant) before invoking it.

fn canonicalize(&self, path: &Path) -> FsResult<PathBuf>

Resolve symlinks and .. to an absolute path. Used as the loop guard when deciding whether a symlinked directory has already been visited.