Creates an event-capable watcher fixture. _fire* delivers synthetic URIs and subscriptions detach correctly; glob selection, ignore flags and a real file system are not applied here (use the higher-level port fake for filtering).
_fire*
Test hook: simulates a native file-change event.
Test hook: simulates a native file-create event.
Test hook: simulates a native file-delete event.
Creates an event-capable watcher fixture.
_fire*delivers synthetic URIs and subscriptions detach correctly; glob selection, ignore flags and a real file system are not applied here (use the higher-level port fake for filtering).