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##############################################################################
#
# Copyright (c) 2014 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Resolution ordering utility tests"""
import unittest
# pylint:disable=blacklisted-name
# pylint:disable=protected-access
# pylint:disable=attribute-defined-outside-init
class Test__mergeOrderings(unittest.TestCase):
def _callFUT(self, orderings):
from zope.interface.ro import _legacy_mergeOrderings
return _legacy_mergeOrderings(orderings)
def test_empty(self):
self.assertEqual(self._callFUT([]), [])
def test_single(self):
self.assertEqual(self._callFUT(['a', 'b', 'c']), ['a', 'b', 'c'])
def test_w_duplicates(self):
self.assertEqual(self._callFUT([['a'], ['b', 'a']]), ['b', 'a'])
def test_suffix_across_multiple_duplicates(self):
O1 = ['x', 'y', 'z']
O2 = ['q', 'z']
O3 = [1, 3, 5]
O4 = ['z']
self.assertEqual(self._callFUT([O1, O2, O3, O4]),
['x', 'y', 'q', 1, 3, 5, 'z'])
class Test__flatten(unittest.TestCase):
def _callFUT(self, ob):
from zope.interface.ro import _legacy_flatten
return _legacy_flatten(ob)
def test_w_empty_bases(self):
class Foo:
pass
foo = Foo()
foo.__bases__ = ()
self.assertEqual(self._callFUT(foo), [foo])
def test_w_single_base(self):
class Foo:
pass
self.assertEqual(self._callFUT(Foo), [Foo, object])
def test_w_bases(self):
class Foo:
pass
class Bar(Foo):
pass
self.assertEqual(self._callFUT(Bar), [Bar, Foo, object])
def test_w_diamond(self):
class Foo:
pass
class Bar(Foo):
pass
class Baz(Foo):
pass
class Qux(Bar, Baz):
pass
self.assertEqual(self._callFUT(Qux),
[Qux, Bar, Foo, object, Baz, Foo, object])
class Test_ro(unittest.TestCase):
maxDiff = None
def _callFUT(self, ob, **kwargs):
from zope.interface.ro import _legacy_ro
return _legacy_ro(ob, **kwargs)
def test_w_empty_bases(self):
class Foo:
pass
foo = Foo()
foo.__bases__ = ()
self.assertEqual(self._callFUT(foo), [foo])
def test_w_single_base(self):
class Foo:
pass
self.assertEqual(self._callFUT(Foo), [Foo, object])
def test_w_bases(self):
class Foo:
pass
class Bar(Foo):
pass
self.assertEqual(self._callFUT(Bar), [Bar, Foo, object])
def test_w_diamond(self):
class Foo:
pass
class Bar(Foo):
pass
class Baz(Foo):
pass
class Qux(Bar, Baz):
pass
self.assertEqual(self._callFUT(Qux),
[Qux, Bar, Baz, Foo, object])
def _make_IOErr(self):
# This can't be done in the standard C3 ordering.
class Foo:
def __init__(self, name, *bases):
self.__name__ = name
self.__bases__ = bases
def __repr__(self): # pragma: no cover
return self.__name__
# Mimic what classImplements(IOError, IIOError)
# does.
IEx = Foo('IEx')
IStdErr = Foo('IStdErr', IEx)
IEnvErr = Foo('IEnvErr', IStdErr)
IIOErr = Foo('IIOErr', IEnvErr)
IOSErr = Foo('IOSErr', IEnvErr)
IOErr = Foo('IOErr', IEnvErr, IIOErr, IOSErr)
return IOErr, [IOErr, IIOErr, IOSErr, IEnvErr, IStdErr, IEx]
def test_non_orderable(self):
IOErr, bases = self._make_IOErr()
self.assertEqual(self._callFUT(IOErr), bases)
def test_mixed_inheritance_and_implementation(self):
# https://github.com/zopefoundation/zope.interface/issues/8
# This test should fail, but doesn't, as described in that issue.
# pylint:disable=inherit-non-class
from zope.interface import Interface
from zope.interface import implementedBy
from zope.interface import implementer
from zope.interface import providedBy
class IFoo(Interface):
pass
@implementer(IFoo)
class ImplementsFoo:
pass
class ExtendsFoo(ImplementsFoo):
pass
class ImplementsNothing:
pass
class ExtendsFooImplementsNothing(ExtendsFoo, ImplementsNothing):
pass
self.assertEqual(
self._callFUT(providedBy(ExtendsFooImplementsNothing())),
[implementedBy(ExtendsFooImplementsNothing),
implementedBy(ExtendsFoo),
implementedBy(ImplementsFoo),
IFoo,
Interface,
implementedBy(ImplementsNothing),
implementedBy(object)])
class C3Setting:
def __init__(self, setting, value):
self._setting = setting
self._value = value
def __enter__(self):
from zope.interface import ro
setattr(ro.C3, self._setting.__name__, self._value)
def __exit__(self, t, v, tb):
from zope.interface import ro
setattr(ro.C3, self._setting.__name__, self._setting)
class TestC3(unittest.TestCase):
def _makeOne(self, C, strict=False, base_mros=None):
from zope.interface.ro import C3
return C3.resolver(C, strict, base_mros)
def test_base_mros_given(self):
c3 = self._makeOne(
type(self),
base_mros={unittest.TestCase: unittest.TestCase.__mro__}
)
memo = c3.memo
self.assertIn(unittest.TestCase, memo)
# We used the StaticMRO class
self.assertIsNone(memo[unittest.TestCase].had_inconsistency)
def test_one_base_optimization(self):
c3 = self._makeOne(type(self))
# Even though we didn't call .mro() yet, the MRO has been
# computed.
self.assertIsNotNone(c3._C3__mro) # pylint:disable=no-member
c3._merge = None
self.assertEqual(c3.mro(), list(type(self).__mro__))
class Test_ROComparison(unittest.TestCase):
class MockC3:
direct_inconsistency = False
bases_had_inconsistency = False
def _makeOne(self, c3=None, c3_ro=(), legacy_ro=()):
from zope.interface.ro import _ROComparison
return _ROComparison(c3 or self.MockC3(), c3_ro, legacy_ro)
def test_inconsistent_label(self):
comp = self._makeOne()
self.assertEqual('no', comp._inconsistent_label)
comp.c3.direct_inconsistency = True
self.assertEqual("direct", comp._inconsistent_label)
comp.c3.bases_had_inconsistency = True
self.assertEqual("direct+bases", comp._inconsistent_label)
comp.c3.direct_inconsistency = False
self.assertEqual('bases', comp._inconsistent_label)
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