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# Copyright 2014 Google, Inc. All rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of astroid.
#
# astroid is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 2.1 of the License, or (at your
# option) any later version.
#
# astroid is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
# for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with astroid. If not, see <http://www.gnu.org/licenses/>.
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
DATA_DIR = 'testdata'
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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