import sys

dir = "."
if "/" in __file__:
    dir = __file__.rsplit("/", 1)[0]

sys.path[0] = dir + "/os"
from path import *

assert split("") == ("", "")
assert split("path") == ("", "path")
assert split("/") == ("/", "")
assert split("/foo") == ("/", "foo")
assert split("/foo/") == ("/foo", "")
assert split("/foo/bar") == ("/foo", "bar")

assert exists(dir + "/test_path.py")
assert not exists(dir + "/test_path.py--")

assert isdir(dir + "/os")
assert not isdir(dir + "/os--")
assert not isdir(dir + "/test_path.py")

assert not isfile(dir + "/os")
assert isfile(dir + "/test_path.py")
assert not isfile(dir + "/test_path.py--")