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import sys

import os.path

import shutil

import unittest

from contextlib import contextmanager

import semmle.populator

from tests import test_utils

import subprocess

if sys.version_info < (3,0):

from StringIO import StringIO

else:

from io import StringIO

ALL_ACCESS = int("777", base=8)

@contextmanager

def discard_output():

new_out, new_err = StringIO(), StringIO()

old_out, old_err = sys.stdout, sys.stderr

try:

sys.stdout, sys.stderr = new_out, new_err

yield

finally:

sys.stdout, sys.stderr = old_out, old_err

class SingleThreadedTest(test_utils.ExtractorTest):

def __init__(self, name):

super(SingleThreadedTest, self).__init__(name)

def test_ioerror(self):

if os.name == "nt":

return

try:

os.chmod(self.trap_path, 0)

with discard_output():

try:

self.run_extractor("-z1", "-y", "package.sub", "mod1", "package.x", "package.sub.a")

except subprocess.CalledProcessError as ex:

self.assertEqual(ex.returncode, 1)

finally:

os.chmod(self.trap_path, ALL_ACCESS)

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