ydb/contrib/python/zope.interface/py2/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():
                """docstring"""

        @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():
                """docstring"""

        @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():
                """docstring"""

        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():
                """docstring"""

        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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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):
                """docstring"""

        @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():
                """docstring"""

        @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):
                """docstring"""

        @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 .idummy import IDummyModule
        from . import dummy

        self._callFUT(IDummyModule, dummy)

    def test_module_miss(self):
        from zope.interface import Interface
        from . 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