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community.general/test/units/module_utils/conftest.py

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Porting tests to pytest (#33387) * Porting tests to pytest * Achievement Get: No longer need mock/generator.py * Now done via pytest's parametrization * Port safe_eval to pytest * Port text tests to pytest * Port test_set_mode_if_different to pytest * Change conftest AnsibleModule fixtures to be more flexible * Move the AnsibleModules fixtures to module_utils/conftest.py for sharing * Testing the argspec code requires: * injecting both the argspec and the arguments. * Patching the arguments into sys.stdin at a different level * More porting to obsolete mock/procenv.py * Port run_command to pytest * Port known_hosts tests to pytest * Port safe_eval to pytest * Port test_distribution_version.py to pytest * Port test_log to pytest * Port test__log_invocation to pytest * Remove unneeded import of procenv in test_postgresql * Port test_pip to pytest style * As part of this, create a pytest ansiblemodule fixture in modules/conftest.py. This is slightly different than the approach taken in module_utils because here we need to override the AnsibleModule that the modules will inherit from instead of one that we're instantiating ourselves. * Fixup usage of parametrization in test_deprecate_warn * Check that the pip module failed in our test
2017-12-05 21:43:13 +01:00
# Copyright (c) 2017 Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
import json
import sys
from collections import MutableMapping
from io import BytesIO
import pytest
import ansible.module_utils.basic
from ansible.module_utils.six import PY3, string_types
from ansible.module_utils._text import to_bytes
@pytest.fixture
def stdin(mocker, request):
old_args = ansible.module_utils.basic._ANSIBLE_ARGS
ansible.module_utils.basic._ANSIBLE_ARGS = None
old_argv = sys.argv
sys.argv = ['ansible_unittest']
if isinstance(request.param, string_types):
args = request.param
elif isinstance(request.param, MutableMapping):
if 'ANSIBLE_MODULE_ARGS' not in request.param:
request.param = {'ANSIBLE_MODULE_ARGS': request.param}
AnsiballZ improvements Now that we don't need to worry about python-2.4 and 2.5, we can make some improvements to the way AnsiballZ handles modules. * Change AnsiballZ wrapper to use import to invoke the module We need the module to think of itself as a script because it could be coded as: main() or as: if __name__ == '__main__': main() Or even as: if __name__ == '__main__': random_function_name() A script will invoke all of those. Prior to this change, we invoked a second Python interpreter on the module so that it really was a script. However, this means that we have to run python twice (once for the AnsiballZ wrapper and once for the module). This change makes the module think that it is a script (because __name__ in the module == '__main__') but it's actually being invoked by us importing the module code. There's three ways we've come up to do this. * The most elegant is to use zipimporter and tell the import mechanism that the module being loaded is __main__: * https://github.com/abadger/ansible/blob/5959f11c9ddb7b6eaa9c3214560bd85e631d4055/lib/ansible/executor/module_common.py#L175 * zipimporter is nice because we do not have to extract the module from the zip file and save it to the disk when we do that. The import machinery does it all for us. * The drawback is that modules do not have a __file__ which points to a real file when they do this. Modules could be using __file__ to for a variety of reasons, most of those probably have replacements (the most common one is to find a writable directory for temporary files. AnsibleModule.tmpdir should be used instead) We can monkeypatch __file__ in fom AnsibleModule initialization but that's kind of gross. There's no way I can see to do this from the wrapper. * Next, there's imp.load_module(): * https://github.com/abadger/ansible/blob/340edf7489/lib/ansible/executor/module_common.py#L151 * imp has the nice property of allowing us to set __name__ to __main__ without changing the name of the file itself * We also don't have to do anything special to set __file__ for backwards compatibility (although the reason for that is the drawback): * Its drawback is that it requires the file to exist on disk so we have to explicitly extract it from the zipfile and save it to a temporary file * The last choice is to use exec to execute the module: * https://github.com/abadger/ansible/blob/f47a4ccc76/lib/ansible/executor/module_common.py#L175 * The code we would have to maintain for this looks pretty clean. In the wrapper we create a ModuleType, set __file__ on it, read the module's contents in from the zip file and then exec it. * Drawbacks: We still have to explicitly extract the file's contents from the zip archive instead of letting python's import mechanism handle it. * Exec also has hidden performance issues and breaks certain assumptions that modules could be making about their own code: http://lucumr.pocoo.org/2011/2/1/exec-in-python/ Our plan is to use imp.load_module() for now, deprecate the use of __file__ in modules, and switch to zipimport once the deprecation period for __file__ is over (without monkeypatching a fake __file__ in via AnsibleModule). * Rename the name of the AnsiBallZ wrapped module This makes it obvious that the wrapped module isn't the module file that we distribute. It's part of trying to mitigate the fact that the module is now named __main)).py in tracebacks. * Shield all wrapper symbols inside of a function With the new import code, all symbols in the wrapper become visible in the module. To mitigate the chance of collisions, move most symbols into a toplevel function. The only symbols left in the global namespace are now _ANSIBALLZ_WRAPPER and _ansiballz_main. revised porting guide entry Integrate code coverage collection into AnsiballZ. ci_coverage ci_complete
2018-06-20 20:23:59 +02:00
if '_ansible_remote_tmp' not in request.param['ANSIBLE_MODULE_ARGS']:
request.param['ANSIBLE_MODULE_ARGS']['_ansible_remote_tmp'] = '/tmp'
if '_ansible_keep_remote_files' not in request.param['ANSIBLE_MODULE_ARGS']:
request.param['ANSIBLE_MODULE_ARGS']['_ansible_keep_remote_files'] = False
Porting tests to pytest (#33387) * Porting tests to pytest * Achievement Get: No longer need mock/generator.py * Now done via pytest's parametrization * Port safe_eval to pytest * Port text tests to pytest * Port test_set_mode_if_different to pytest * Change conftest AnsibleModule fixtures to be more flexible * Move the AnsibleModules fixtures to module_utils/conftest.py for sharing * Testing the argspec code requires: * injecting both the argspec and the arguments. * Patching the arguments into sys.stdin at a different level * More porting to obsolete mock/procenv.py * Port run_command to pytest * Port known_hosts tests to pytest * Port safe_eval to pytest * Port test_distribution_version.py to pytest * Port test_log to pytest * Port test__log_invocation to pytest * Remove unneeded import of procenv in test_postgresql * Port test_pip to pytest style * As part of this, create a pytest ansiblemodule fixture in modules/conftest.py. This is slightly different than the approach taken in module_utils because here we need to override the AnsibleModule that the modules will inherit from instead of one that we're instantiating ourselves. * Fixup usage of parametrization in test_deprecate_warn * Check that the pip module failed in our test
2017-12-05 21:43:13 +01:00
args = json.dumps(request.param)
else:
raise Exception('Malformed data to the stdin pytest fixture')
fake_stdin = BytesIO(to_bytes(args, errors='surrogate_or_strict'))
if PY3:
mocker.patch('ansible.module_utils.basic.sys.stdin', mocker.MagicMock())
mocker.patch('ansible.module_utils.basic.sys.stdin.buffer', fake_stdin)
else:
mocker.patch('ansible.module_utils.basic.sys.stdin', fake_stdin)
yield fake_stdin
ansible.module_utils.basic._ANSIBLE_ARGS = old_args
sys.argv = old_argv
@pytest.fixture
def am(stdin, request):
old_args = ansible.module_utils.basic._ANSIBLE_ARGS
ansible.module_utils.basic._ANSIBLE_ARGS = None
old_argv = sys.argv
sys.argv = ['ansible_unittest']
argspec = {}
if hasattr(request, 'param'):
if isinstance(request.param, dict):
argspec = request.param
am = ansible.module_utils.basic.AnsibleModule(
argument_spec=argspec,
)
am._name = 'ansible_unittest'
yield am
ansible.module_utils.basic._ANSIBLE_ARGS = old_args
sys.argv = old_argv
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