appendFile with mixin node.js fs + memfs

[bluelovers]

real file

../test/456 => 999999999999999\n

=========

import { fs as memfs, vol, Volume, createFsFromVolume, IFs } from 'memfs';
import { ufs } from 'unionfs';
import * as fsNode from 'fs';

let vol2 = Volume.fromJSON({
	'../test': null,
}, );

let memfs2 = createFsFromVolume(vol2);

export const fs: IFs = ufs
	.use(fsNode)
	.use(memfs2)
;

console.log(1, fs.readFileSync('../test/456').toString());

fs.appendFileSync('../test/456', '123');

console.log(2, fs.readFileSync('../test/456').toString());

expect is 999999999999999\n123 but got 123 only at step 2

[iamogbz]

@bluelovers swapping the order of the use

export const fs: IFs = ufs
	.use(memfs2)
	.use(fsNode)

or removing the fake mem directory

let vol2 = Volume.fromJSON({});

works