pyfakefs disallows legal readlink

[agroce]

import shutil
import pyfakefs.fake_filesystem
import os

ROOT_PATH = "/Volumes/ramdisk/newtest"

fs = pyfakefs.fake_filesystem.FakeFilesystem()
fs.CreateDirectory('/Volumes')
fs.CreateDirectory('/Volumes/ramdisk')
fs.CreateDirectory('/Volumes/ramdisk/newtest')
os0 = pyfakefs.fake_filesystem.FakeOsModule(fs)
opener0 = pyfakefs.fake_filesystem.FakeFileOpen(fs)

if False:
    os0 = os
    shutil.rmtree(ROOT_PATH)
    os.mkdir(ROOT_PATH)

component0 = "alpha" 
path0 = ROOT_PATH 
path0 += os.path.sep + component0 
component0 = "" 
os0.symlink(path0,path0) 
path0 += os.path.sep + component0 
result = os0.readlink(path0) 

[mrbean-bremen]

For the record: this raises OSError 40 (ELOOP) under Linux, OSError 22 (EINVAL) under Windows, and does not raise under MacOS.