NewFakeFs returns a fake Filesystem that exists in-memory, useful for unit tests.

DefaultFs implements Filesystem using same-named functions from "os" and "io".

File is an interface that we can use to mock various filesystem operations typically accessed through the File object from the "os" package.

Filesystem is an interface that we can use to mock various filesystem operations.

FSWatcher is a callback-based filesystem watcher abstraction for fsnotify.

FSErrorHandler is called when a fsnotify error occurs.

FSEventHandler is called when a fsnotify event occurs.