Current File : //lib/python3/dist-packages/zope/interface/tests/test_verify.py
##############################################################################
#
# Copyright (c) 2001, 2002 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.
#
##############################################################################
""" zope.interface.verify unit tests
"""
import unittest
# pylint:disable=inherit-non-class,no-method-argument,no-self-argument
class Test_verifyClass(unittest.TestCase):
verifier = None
def setUp(self):
self.verifier = self._get_FUT()
@classmethod
def _get_FUT(cls):
from zope.interface.verify import verifyClass
return verifyClass
_adjust_object_before_verify = lambda self, x: x
def _callFUT(self, iface, klass, **kwargs):
return self.verifier(iface,
self._adjust_object_before_verify(klass),
**kwargs)
def test_class_doesnt_implement(self):
from zope.interface import Interface
from zope.interface.exceptions import DoesNotImplement
class ICurrent(Interface):
pass
class Current(object):
pass
self.assertRaises(DoesNotImplement, self._callFUT, ICurrent, Current)
def test_class_doesnt_implement_but_classImplements_later(self):
from zope.interface import Interface
from zope.interface import classImplements
class ICurrent(Interface):
pass
class Current(object):
pass
classImplements(Current, ICurrent)
self._callFUT(ICurrent, Current)
def test_class_doesnt_have_required_method_simple(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenImplementation
class ICurrent(Interface):
def method():
pass
@implementer(ICurrent)
class Current(object):
pass
self.assertRaises(BrokenImplementation,
self._callFUT, ICurrent, Current)
def test_class_has_required_method_simple(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method():
pass
@implementer(ICurrent)
class Current(object):
def method(self):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_class_doesnt_have_required_method_derived(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenImplementation
class IBase(Interface):
def method():
pass
class IDerived(IBase):
pass
@implementer(IDerived)
class Current(object):
pass
self.assertRaises(BrokenImplementation,
self._callFUT, IDerived, Current)
def test_class_has_required_method_derived(self):
from zope.interface import Interface
from zope.interface import implementer
class IBase(Interface):
def method():
pass
class IDerived(IBase):
pass
@implementer(IDerived)
class Current(object):
def method(self):
raise NotImplementedError()
self._callFUT(IDerived, Current)
def test_method_takes_wrong_arg_names_but_OK(self):
# We no longer require names to match.
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self, b):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_takes_not_enough_args(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_method_doesnt_take_required_starargs(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(*args):
pass
@implementer(ICurrent)
class Current(object):
def method(self):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_method_doesnt_take_required_only_kwargs(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(**kw):
pass
@implementer(ICurrent)
class Current(object):
def method(self):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_method_takes_extra_arg(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a, b):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_method_takes_extra_arg_with_default(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a, b=None):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_takes_only_positional_args(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self, *args):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_takes_only_kwargs(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self, **kw):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_method_takes_extra_starargs(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a, *args):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_takes_extra_starargs_and_kwargs(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a, *args, **kw):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_doesnt_take_required_positional_and_starargs(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(a, *args):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_method_takes_required_positional_and_starargs(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(a, *args):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a, *args):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_takes_only_starargs(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(a, *args):
pass
@implementer(ICurrent)
class Current(object):
def method(self, *args):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_takes_required_kwargs(self):
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
def method(**kwargs):
pass
@implementer(ICurrent)
class Current(object):
def method(self, **kw):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_method_takes_positional_plus_required_starargs(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(*args):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a, *args):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_method_doesnt_take_required_kwargs(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method(**kwargs):
pass
@implementer(ICurrent)
class Current(object):
def method(self, a):
raise NotImplementedError()
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_class_has_method_for_iface_attr(self):
from zope.interface import Attribute
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
attr = Attribute("The foo Attribute")
@implementer(ICurrent)
class Current:
def attr(self):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_class_has_nonmethod_for_method(self):
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenMethodImplementation
class ICurrent(Interface):
def method():
pass
@implementer(ICurrent)
class Current:
method = 1
self.assertRaises(BrokenMethodImplementation,
self._callFUT, ICurrent, Current)
def test_class_has_attribute_for_attribute(self):
from zope.interface import Attribute
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
attr = Attribute("The foo Attribute")
@implementer(ICurrent)
class Current:
attr = 1
self._callFUT(ICurrent, Current)
def test_class_misses_attribute_for_attribute(self):
# This check *passes* for verifyClass
from zope.interface import Attribute
from zope.interface import Interface
from zope.interface import implementer
class ICurrent(Interface):
attr = Attribute("The foo Attribute")
@implementer(ICurrent)
class Current:
pass
self._callFUT(ICurrent, Current)
def test_w_callable_non_func_method(self):
from zope.interface.interface import Method
from zope.interface import Interface
from zope.interface import implementer
class QuasiMethod(Method):
def __call__(self, *args, **kw):
raise NotImplementedError()
class QuasiCallable(object):
def __call__(self, *args, **kw):
raise NotImplementedError()
class ICurrent(Interface):
attr = QuasiMethod('This is callable')
@implementer(ICurrent)
class Current:
attr = QuasiCallable()
self._callFUT(ICurrent, Current)
def test_w_decorated_method(self):
from zope.interface import Interface
from zope.interface import implementer
def decorator(func):
# this is, in fact, zope.proxy.non_overridable
return property(lambda self: func.__get__(self))
class ICurrent(Interface):
def method(a):
pass
@implementer(ICurrent)
class Current(object):
@decorator
def method(self, a):
raise NotImplementedError()
self._callFUT(ICurrent, Current)
def test_dict_IFullMapping(self):
# A dict should be an IFullMapping, but this exposes two
# issues. First, on CPython, methods of builtin types are
# "method_descriptor" objects, and are harder to introspect.
# Second, on PyPy, the signatures can be just plain wrong,
# specifying as required arguments that are actually optional.
# See https://github.com/zopefoundation/zope.interface/issues/118
from zope.interface.common.mapping import IFullMapping
self._callFUT(IFullMapping, dict, tentative=True)
def test_list_ISequence(self):
# As for test_dict_IFullMapping
from zope.interface.common.sequence import ISequence
self._callFUT(ISequence, list, tentative=True)
def test_tuple_IReadSequence(self):
# As for test_dict_IFullMapping
from zope.interface.common.sequence import IReadSequence
self._callFUT(IReadSequence, tuple, tentative=True)
def test_multiple_invalid(self):
from zope.interface.exceptions import MultipleInvalid
from zope.interface.exceptions import DoesNotImplement
from zope.interface.exceptions import BrokenImplementation
from zope.interface import Interface
from zope.interface import classImplements
class ISeveralMethods(Interface):
def meth1(arg1):
"Method 1"
def meth2(arg1):
"Method 2"
class SeveralMethods(object):
pass
with self.assertRaises(MultipleInvalid) as exc:
self._callFUT(ISeveralMethods, SeveralMethods)
ex = exc.exception
self.assertEqual(3, len(ex.exceptions))
self.assertIsInstance(ex.exceptions[0], DoesNotImplement)
self.assertIsInstance(ex.exceptions[1], BrokenImplementation)
self.assertIsInstance(ex.exceptions[2], BrokenImplementation)
# If everything else is correct, only the single error is raised without
# the wrapper.
classImplements(SeveralMethods, ISeveralMethods)
SeveralMethods.meth1 = lambda self, arg1: "Hi"
with self.assertRaises(BrokenImplementation):
self._callFUT(ISeveralMethods, SeveralMethods)
class Test_verifyObject(Test_verifyClass):
@classmethod
def _get_FUT(cls):
from zope.interface.verify import verifyObject
return verifyObject
def _adjust_object_before_verify(self, target):
if isinstance(target, (type, type(OldSkool))):
target = target()
return target
def test_class_misses_attribute_for_attribute(self):
# This check *fails* for verifyObject
from zope.interface import Attribute
from zope.interface import Interface
from zope.interface import implementer
from zope.interface.exceptions import BrokenImplementation
class ICurrent(Interface):
attr = Attribute("The foo Attribute")
@implementer(ICurrent)
class Current:
pass
self.assertRaises(BrokenImplementation,
self._callFUT, ICurrent, Current)
def test_module_hit(self):
from zope.interface.tests.idummy import IDummyModule
from zope.interface.tests import dummy
self._callFUT(IDummyModule, dummy)
def test_module_miss(self):
from zope.interface import Interface
from zope.interface.tests import dummy
from zope.interface.exceptions import DoesNotImplement
# same name, different object
class IDummyModule(Interface):
pass
self.assertRaises(DoesNotImplement,
self._callFUT, IDummyModule, dummy)
def test_staticmethod_hit_on_class(self):
from zope.interface import Interface
from zope.interface import provider
from zope.interface.verify import verifyObject
class IFoo(Interface):
def bar(a, b):
"The bar method"
@provider(IFoo)
class Foo(object):
@staticmethod
def bar(a, b):
raise AssertionError("We're never actually called")
# Don't use self._callFUT, we don't want to instantiate the
# class.
verifyObject(IFoo, Foo)
class OldSkool:
pass
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