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# Copyright (c) 2014 Google, Inc.
# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import binascii
import contextlib
import os
import sys
import shutil
import tempfile
import pkg_resources
import six
from astroid import builder
from astroid import MANAGER
from astroid import tests
DATA_DIR = 'testdata'
RESOURCE_PATH = os.path.join(tests.__path__[0], DATA_DIR, 'data')
BUILTINS = six.moves.builtins.__name__
@contextlib.contextmanager
def _temporary_file():
name = binascii.hexlify(os.urandom(5)).decode()
path = find(name)
try:
yield path
finally:
os.remove(path)
@contextlib.contextmanager
def tempfile_with_content(content):
with _temporary_file() as tmp:
with open(tmp, 'wb') as stream:
stream.write(content)
yield tmp
def find(name):
return pkg_resources.resource_filename(
'astroid.tests',
os.path.normpath(os.path.join(DATA_DIR, name)))
def build_file(path, modname=None):
return builder.AstroidBuilder().file_build(find(path), modname)
class SysPathSetup(object):
def setUp(self):
sys.path.insert(0, find(''))
def tearDown(self):
del sys.path[0]
datadir = find('')
for key in list(sys.path_importer_cache):
if key.startswith(datadir):
del sys.path_importer_cache[key]
class AstroidCacheSetupMixin(object):
"""Mixin for handling the astroid cache problems.
When clearing the astroid cache, some tests fails due to
cache inconsistencies, where some objects had a different
builtins object referenced.
This saves the builtins module and makes sure to add it
back to the astroid_cache after the tests finishes.
The builtins module is special, since some of the
transforms for a couple of its objects (str, bytes etc)
are executed only once, so astroid_bootstrapping will be
useless for retrieving the original builtins module.
"""
@classmethod
def setUpClass(cls):
cls._builtins = MANAGER.astroid_cache.get(BUILTINS)
@classmethod
def tearDownClass(cls):
if cls._builtins:
MANAGER.astroid_cache[BUILTINS] = cls._builtins
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