import os
import shutil
from contextlib import chdir


def test_long_path():
    # NAME_MAX of 255
    long_filename = "_".join(["testdir"]*32)
    long_path_end = startingwd = os.getcwd()
    try:
        # I thought this would have to be 16, i.e. a path length over 4096, PATH_MAX
        # but seemingly just crossing 1050 is enough to fail
        for _ in range(4):
            os.mkdir(long_filename)
            os.chdir(long_filename)
            long_path_end = os.path.join(long_path_end, long_filename)
        os.mkdir(long_filename)
        long_path_end = os.path.join(long_path_end, long_filename)
        with chdir(long_filename):
            #self.assertEqual(os.getcwd(), long_path_end)
            assert os.getcwd() == long_path_end
            print("passed")
    finally:
        shutil.rmtree(os.path.join(startingwd, long_filename), ignore_errors=True)


test_long_path()