homeserver/ansible_collections/community/general/tests/unit/mock/procenv.py

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# (c) 2016, Matt Davis <mdavis@ansible.com>
# (c) 2016, Toshio Kuratomi <tkuratomi@ansible.com>
#
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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.community.general.tests.unit.compat import unittest
from ansible.module_utils.six import PY3
from ansible.module_utils.common.text.converters 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)