ansible/test/units/utils/test_collection_loader.py

129 lines
5.7 KiB
Python

from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
import sys
def test_import_from_collection(monkeypatch):
collection_root = os.path.join(os.path.dirname(__file__), 'fixtures', 'collections')
collection_path = os.path.join(collection_root, 'ansible_collections/my_namespace/my_collection/plugins/module_utils/my_util.py')
# the trace we're expecting to be generated when running the code below:
# answer = question()
expected_trace_log = [
(collection_path, 5, 'call'),
(collection_path, 6, 'line'),
(collection_path, 6, 'return'),
]
# define the collection root before any ansible code has been loaded
# otherwise config will have already been loaded and changing the environment will have no effect
monkeypatch.setenv('ANSIBLE_COLLECTIONS_PATHS', collection_root)
from ansible.utils.collection_loader import AnsibleCollectionLoader
# zap the singleton collection loader instance if it exists
AnsibleCollectionLoader._Singleton__instance = None
for index in [idx for idx, obj in enumerate(sys.meta_path) if isinstance(obj, AnsibleCollectionLoader)]:
# replace any existing collection loaders that may exist
# since these were loaded during unit test collection
# they will not have the correct configuration
sys.meta_path[index] = AnsibleCollectionLoader()
# make sure the collection loader is installed
# this will be a no-op if the collection loader is already installed
# which will depend on whether or not any tests being run imported ansible.plugins.loader during unit test collection
from ansible.plugins.loader import _configure_collection_loader
_configure_collection_loader() # currently redundant, the import above already calls this
from ansible_collections.my_namespace.my_collection.plugins.module_utils.my_util import question
original_trace_function = sys.gettrace()
trace_log = []
if original_trace_function:
# enable tracing while preserving the existing trace function (coverage)
def my_trace_function(frame, event, arg):
trace_log.append((frame.f_code.co_filename, frame.f_lineno, event))
# the original trace function expects to have itself set as the trace function
sys.settrace(original_trace_function)
# call the original trace function
original_trace_function(frame, event, arg)
# restore our trace function
sys.settrace(my_trace_function)
return my_trace_function
else:
# no existing trace function, so our trace function is much simpler
def my_trace_function(frame, event, arg):
trace_log.append((frame.f_code.co_filename, frame.f_lineno, event))
return my_trace_function
sys.settrace(my_trace_function)
try:
# run a minimal amount of code while the trace is running
# adding more code here, including use of a context manager, will add more to our trace
answer = question()
finally:
sys.settrace(original_trace_function)
# make sure 'import ... as ...' works on builtin synthetic collections
# the following import is not supported (it tries to find module_utils in ansible.plugins)
# import ansible_collections.ansible.builtin.plugins.module_utils as c1
import ansible_collections.ansible.builtin.plugins.action as c2
import ansible_collections.ansible.builtin.plugins as c3
import ansible_collections.ansible.builtin as c4
import ansible_collections.ansible as c5
import ansible_collections as c6
# make sure 'import ...' works on builtin synthetic collections
import ansible_collections.ansible.builtin.plugins.module_utils
import ansible_collections.ansible.builtin.plugins.action
assert ansible_collections.ansible.builtin.plugins.action == c3.action == c2
import ansible_collections.ansible.builtin.plugins
assert ansible_collections.ansible.builtin.plugins == c4.plugins == c3
import ansible_collections.ansible.builtin
assert ansible_collections.ansible.builtin == c5.builtin == c4
import ansible_collections.ansible
assert ansible_collections.ansible == c6.ansible == c5
import ansible_collections
assert ansible_collections == c6
# make sure 'from ... import ...' works on builtin synthetic collections
from ansible_collections.ansible import builtin
from ansible_collections.ansible.builtin import plugins
assert builtin.plugins == plugins
from ansible_collections.ansible.builtin.plugins import action
from ansible_collections.ansible.builtin.plugins.action import command
assert action.command == command
from ansible_collections.ansible.builtin.plugins.module_utils import basic
from ansible_collections.ansible.builtin.plugins.module_utils.basic import AnsibleModule
assert basic.AnsibleModule == AnsibleModule
# make sure relative imports work from collections code
# these require __package__ to be set correctly
import ansible_collections.my_namespace.my_collection.plugins.module_utils.my_other_util
import ansible_collections.my_namespace.my_collection.plugins.action.my_action
# verify that code loaded from a collection does not inherit __future__ statements from the collection loader
if sys.version_info[0] == 2:
# if the collection code inherits the division future feature from the collection loader this will fail
assert answer == 1
else:
assert answer == 1.5
# verify that the filename and line number reported by the trace is correct
# this makes sure that collection loading preserves file paths and line numbers
assert trace_log == expected_trace_log