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# vim: set fileencoding=utf-8 :
import functools
import mock
def patch_popen(stdout=b'', stderr=b'', returncode=1):
"""Decorator to easily set the return value of popen.communicate()"""
def patch_popen_decorator(func):
@functools.wraps(func)
def wrap(self):
with mock.patch('subprocess.Popen') as create_mock:
popen_mock = mock.Mock(**{'returncode': returncode,
'communicate.return_value': (stdout, stderr)})
create_mock.return_value = popen_mock
return func(self, create_mock)
return wrap
return patch_popen_decorator
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