/usr/lib/python3/dist-packages/oslo_utils/tests/test_reflection.py is in python3-oslo.utils 3.8.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslotest import base as test_base
import six
import testtools
from oslo_utils import reflection
if six.PY3:
RUNTIME_ERROR_CLASSES = ['RuntimeError', 'Exception',
'BaseException', 'object']
else:
RUNTIME_ERROR_CLASSES = ['RuntimeError', 'StandardError', 'Exception',
'BaseException', 'object']
def dummy_decorator(f):
@six.wraps(f)
def wrapper(*args, **kwargs):
return f(*args, **kwargs)
return wrapper
def mere_function(a, b):
pass
def function_with_defs(a, b, optional=None):
pass
def function_with_kwargs(a, b, **kwargs):
pass
class TestObject(object):
def _hello(self):
pass
def hi(self):
pass
class Class(object):
def method(self, c, d):
pass
@staticmethod
def static_method(e, f):
pass
@classmethod
def class_method(cls, g, h):
pass
class BadClass(object):
def do_something(self):
pass
def __nonzero__(self):
return False
class CallableClass(object):
def __call__(self, i, j):
pass
class ClassWithInit(object):
def __init__(self, k, l):
pass
class MemberGetTest(test_base.BaseTestCase):
def test_get_members_exclude_hidden(self):
obj = TestObject()
members = list(reflection.get_members(obj, exclude_hidden=True))
self.assertEqual(1, len(members))
def test_get_members_no_exclude_hidden(self):
obj = TestObject()
members = list(reflection.get_members(obj, exclude_hidden=False))
self.assertGreater(len(members), 1)
def test_get_members_names_exclude_hidden(self):
obj = TestObject()
members = list(reflection.get_member_names(obj, exclude_hidden=True))
self.assertEqual(["hi"], members)
def test_get_members_names_no_exclude_hidden(self):
obj = TestObject()
members = list(reflection.get_member_names(obj, exclude_hidden=False))
members = [member for member in members if not member.startswith("__")]
self.assertEqual(["_hello", "hi"], sorted(members))
class CallbackEqualityTest(test_base.BaseTestCase):
def test_different_simple_callbacks(self):
def a():
pass
def b():
pass
self.assertFalse(reflection.is_same_callback(a, b))
def test_static_instance_callbacks(self):
class A(object):
@staticmethod
def b(a, b, c):
pass
a = A()
b = A()
self.assertTrue(reflection.is_same_callback(a.b, b.b))
def test_different_instance_callbacks(self):
class A(object):
def b(self):
pass
def __eq__(self, other):
return True
b = A()
c = A()
self.assertFalse(reflection.is_same_callback(b.b, c.b))
self.assertTrue(reflection.is_same_callback(b.b, c.b, strict=False))
class BoundMethodTest(test_base.BaseTestCase):
def test_baddy(self):
b = BadClass()
self.assertTrue(reflection.is_bound_method(b.do_something))
def test_static_method(self):
self.assertFalse(reflection.is_bound_method(Class.static_method))
class GetCallableNameTest(test_base.BaseTestCase):
def test_mere_function(self):
name = reflection.get_callable_name(mere_function)
self.assertEqual('.'.join((__name__, 'mere_function')), name)
def test_method(self):
name = reflection.get_callable_name(Class.method)
self.assertEqual('.'.join((__name__, 'Class', 'method')), name)
def test_instance_method(self):
name = reflection.get_callable_name(Class().method)
self.assertEqual('.'.join((__name__, 'Class', 'method')), name)
def test_static_method(self):
name = reflection.get_callable_name(Class.static_method)
if six.PY3:
self.assertEqual('.'.join((__name__, 'Class', 'static_method')),
name)
else:
# NOTE(imelnikov): static method are just functions, class name
# is not recorded anywhere in them.
self.assertEqual('.'.join((__name__, 'static_method')), name)
def test_class_method(self):
name = reflection.get_callable_name(Class.class_method)
self.assertEqual('.'.join((__name__, 'Class', 'class_method')), name)
def test_constructor(self):
name = reflection.get_callable_name(Class)
self.assertEqual('.'.join((__name__, 'Class')), name)
def test_callable_class(self):
name = reflection.get_callable_name(CallableClass())
self.assertEqual('.'.join((__name__, 'CallableClass')), name)
def test_callable_class_call(self):
name = reflection.get_callable_name(CallableClass().__call__)
self.assertEqual('.'.join((__name__, 'CallableClass',
'__call__')), name)
# These extended/special case tests only work on python 3, due to python 2
# being broken/incorrect with regard to these special cases...
@testtools.skipIf(not six.PY3, 'python 3.x is not currently available')
class GetCallableNameTestExtended(test_base.BaseTestCase):
# Tests items in http://legacy.python.org/dev/peps/pep-3155/
class InnerCallableClass(object):
def __call__(self):
pass
def test_inner_callable_class(self):
obj = self.InnerCallableClass()
name = reflection.get_callable_name(obj.__call__)
expected_name = '.'.join((__name__, 'GetCallableNameTestExtended',
'InnerCallableClass', '__call__'))
self.assertEqual(expected_name, name)
def test_inner_callable_function(self):
def a():
def b():
pass
return b
name = reflection.get_callable_name(a())
expected_name = '.'.join((__name__, 'GetCallableNameTestExtended',
'test_inner_callable_function', '<locals>',
'a', '<locals>', 'b'))
self.assertEqual(expected_name, name)
def test_inner_class(self):
obj = self.InnerCallableClass()
name = reflection.get_callable_name(obj)
expected_name = '.'.join((__name__,
'GetCallableNameTestExtended',
'InnerCallableClass'))
self.assertEqual(expected_name, name)
class GetCallableArgsTest(test_base.BaseTestCase):
def test_mere_function(self):
result = reflection.get_callable_args(mere_function)
self.assertEqual(['a', 'b'], result)
def test_function_with_defaults(self):
result = reflection.get_callable_args(function_with_defs)
self.assertEqual(['a', 'b', 'optional'], result)
def test_required_only(self):
result = reflection.get_callable_args(function_with_defs,
required_only=True)
self.assertEqual(['a', 'b'], result)
def test_method(self):
result = reflection.get_callable_args(Class.method)
self.assertEqual(['self', 'c', 'd'], result)
def test_instance_method(self):
result = reflection.get_callable_args(Class().method)
self.assertEqual(['c', 'd'], result)
def test_class_method(self):
result = reflection.get_callable_args(Class.class_method)
self.assertEqual(['g', 'h'], result)
def test_class_constructor(self):
result = reflection.get_callable_args(ClassWithInit)
self.assertEqual(['k', 'l'], result)
def test_class_with_call(self):
result = reflection.get_callable_args(CallableClass())
self.assertEqual(['i', 'j'], result)
def test_decorators_work(self):
@dummy_decorator
def special_fun(x, y):
pass
result = reflection.get_callable_args(special_fun)
self.assertEqual(['x', 'y'], result)
class AcceptsKwargsTest(test_base.BaseTestCase):
def test_no_kwargs(self):
self.assertEqual(False, reflection.accepts_kwargs(mere_function))
def test_with_kwargs(self):
self.assertEqual(True, reflection.accepts_kwargs(function_with_kwargs))
class GetClassNameTest(test_base.BaseTestCase):
def test_std_exception(self):
name = reflection.get_class_name(RuntimeError)
self.assertEqual('RuntimeError', name)
def test_class(self):
name = reflection.get_class_name(Class)
self.assertEqual('.'.join((__name__, 'Class')), name)
def test_qualified_class(self):
class QualifiedClass(object):
pass
name = reflection.get_class_name(QualifiedClass)
self.assertEqual('.'.join((__name__, 'QualifiedClass')), name)
def test_instance(self):
name = reflection.get_class_name(Class())
self.assertEqual('.'.join((__name__, 'Class')), name)
def test_int(self):
name = reflection.get_class_name(42)
self.assertEqual('int', name)
def test_class_method(self):
name = reflection.get_class_name(Class.class_method)
self.assertEqual('%s.Class' % __name__, name)
# test with fully_qualified=False
name = reflection.get_class_name(Class.class_method,
fully_qualified=False)
self.assertEqual('Class', name)
def test_static_method(self):
self.assertRaises(TypeError, reflection.get_class_name,
Class.static_method)
def test_unbound_method(self):
self.assertRaises(TypeError, reflection.get_class_name,
mere_function)
def test_bound_method(self):
c = Class()
name = reflection.get_class_name(c.method)
self.assertEqual('%s.Class' % __name__, name)
# test with fully_qualified=False
name = reflection.get_class_name(c.method, fully_qualified=False)
self.assertEqual('Class', name)
class GetAllClassNamesTest(test_base.BaseTestCase):
def test_std_class(self):
names = list(reflection.get_all_class_names(RuntimeError))
self.assertEqual(RUNTIME_ERROR_CLASSES, names)
def test_std_class_up_to(self):
names = list(reflection.get_all_class_names(RuntimeError,
up_to=Exception))
self.assertEqual(RUNTIME_ERROR_CLASSES[:-2], names)
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