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procenv.py
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# (c) 2016, Matt Davis <mdavis@ansible.com>
# (c) 2016, Toshio Kuratomi <tkuratomi@ansible.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
# Make coding more python3-ish
from __future__ import absolute_import, division, print_function
__metaclass__ = type
import sys
import json
from contextlib import contextmanager
from io import BytesIO, StringIO
from ansible_collections.vyos.vyos.tests.unit.compat import unittest
from ansible.module_utils.six import PY3
from ansible.module_utils._text import to_bytes
@contextmanager
def swap_stdin_and_argv(stdin_data="", argv_data=tuple()):
"""
context manager that temporarily masks the test runner's values for stdin and argv
"""
real_stdin = sys.stdin
real_argv = sys.argv
if PY3:
fake_stream = StringIO(stdin_data)
fake_stream.buffer = BytesIO(to_bytes(stdin_data))
else:
fake_stream = BytesIO(to_bytes(stdin_data))
try:
sys.stdin = fake_stream
sys.argv = argv_data
yield
finally:
sys.stdin = real_stdin
sys.argv = real_argv
@contextmanager
def swap_stdout():
"""
context manager that temporarily replaces stdout for tests that need to verify output
"""
old_stdout = sys.stdout
if PY3:
fake_stream = StringIO()
else:
fake_stream = BytesIO()
try:
sys.stdout = fake_stream
yield fake_stream
finally:
sys.stdout = old_stdout
class ModuleTestCase(unittest.TestCase):
def setUp(self, module_args=None):
if module_args is None:
module_args = {
"_ansible_remote_tmp": "/tmp",
"_ansible_keep_remote_files": False,
}
args = json.dumps(dict(ANSIBLE_MODULE_ARGS=module_args))
# unittest doesn't have a clean place to use a context manager, so we have to enter/exit manually
self.stdin_swap = swap_stdin_and_argv(stdin_data=args)
self.stdin_swap.__enter__()
def tearDown(self):
# unittest doesn't have a clean place to use a context manager, so we have to enter/exit manually
self.stdin_swap.__exit__(None, None, None)

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