If you work with absolute paths, you should get what you expect from memfs.
You can also use relative paths but the gotcha is that then memfs needs
to somehow resolve those relative paths into absolute paths. memfs will use
the value of process.cwd() to resolve the relative paths. The problem is
that process.cwd() specifies the current working directory of your
on-disk filesystem and you will probably not have that directory available in your
memfs volume.
The best solution is to always use absolute paths. Alternatively, you can use
mkdir method to recursively create the current working directory in your
volume:
vol.mkdirSync(process.cwd(), { recursive: true });Or, you can set the current working directory to /, which
is one folder that exists in all memfs volumes:
process.chdir('/');