"Statting" a file under a non-existant directory causes MemoryFileSystem.statSync to throw an error

[nathanhinish]

MemoryFileSystem.priotoype.meta loops through 0...n-1 entries in the split file path. Suppose, /path/to/existing/files exists but /path/to/existing/files/plus does not. Then, sending /path/to/existing/files/plus/extra causes the meta method to return null. This causes an issue in the conditional inside statSync(). When isDir() is called, it tests the type of the incoming object. But if that object is null, typeof evaluates to "object", which I believe is unintended.

I believe the fix for this is to return undefined inside MemoryFileSystem.priotoype.meta instead of null.

[nathanhinish]

Place this somewhere in your project to correct the error for now...

const MemoryFileSystem = require('memory-fs')
// Currently, there's a bug in MemoryFileSystem
// that causes an error when a file in a
// non-existent directory is passed in to stat()
const memMeta = MemoryFileSystem.prototype.meta
MemoryFileSystem.prototype.meta = function meta(_path) {
  const result = memMeta.bind(this, _path)
  if (result === null) {
    result = undefined
  }
  return result
}

[sokra]

yep, that's correct. Thanks for investigating. Do you want to send a PR?