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"""Utility code for tests."""
__author__ = "Jens Finkhaeuser"
__copyright__ = "Copyright (c) 2017-2021 Jens Finkhaeuser"
__license__ = "MIT"
__all__ = ()
import pytest
class Sandboxer:
"""
Given a sandbox template path, uses pytest to create a temporary directory,
then copies the template's contents there, and changes to the directory.
At exit, it changes back to the current working directory.
"""
def __init__(self, tmpdir, path=None):
self.__tmpdir = tmpdir
self.__templatepath = path
def __enter__(self):
# Save current working directory & python path
import os, sys
self.__cwd = os.getcwd()
self.__syspath = sys.path[:]
# Create a new temporary directory and copy the template over
if self.__templatepath:
tmp = str(self.__tmpdir.join(self.__templatepath))
import shutil
shutil.copytree(self.__templatepath, tmp)
else:
tmp = self.__tmpdir
# Then change to the temporary directory & python path
os.chdir(str(tmp))
import site
sys.path.insert(0, tmp)
def __exit__(self, exc_type, exc_value, traceback):
# Restore current working directory & python path
import os, sys
os.chdir(str(self.__cwd))
sys.path = self.__syspath
# Don't suppress exceptions
return False
def sandbox(*args, **kwargs):
"""Create a sandbox"""
return Sandboxer(*args, **kwargs)
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