Incorrectly successful symlink

[agroce]

import shutil
import pyfakefs.fake_filesystem
import os

ROOT_PATH = "/Volumes/ramdisk/test"

fs = pyfakefs.fake_filesystem.FakeFilesystem()
fs.CreateDirectory('/Volumes')
fs.CreateDirectory('/Volumes/ramdisk')
fs.CreateDirectory('/Volumes/ramdisk/test')
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" 
component1 = "" 
path0 = ROOT_PATH 
path0 += os.path.sep + component0 
path0 += os.path.sep + component1 
os0.symlink(path0,path0) 

OS raises OSError: [Errno 2] No such file or directory

[mrbean-bremen]

Shall raise OSError (errno 2) both under Linux and MacOS, but raises OSError (Errno 17) under Linux and does not raise under MacOS in fake filesystem.
Behaves correctly under Windows (OSError, errno 22).