Async methods in memory-fs don't work with `promisify` in native node module `util` about memory-fs

[nrkn]

It's because of how MemoryFileSystem is a class. It doesn't really need to be - I might fork this if they don't intend to fix this, because it's kind of annoying. Native fs doesn't need bind, this package should work the same so that it's a drop in replacement and you don't have to change your client code.

[GeorgeTaveras1231]

In the past, I worked around this by creating what I've been calling a "bound proxy".

const fs = new Proxy(
  new MemoryFileSystem(),
  {
    get(obj, prop) {
      if (typeof obj[prop] === 'function') {
        return obj[prop].bind(obj);
      }

      return obj[prop]
    }
  }
);