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##############################################################################
#
# Copyright (c) 2003 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.
#
##############################################################################
"""Test interface declarations against ExtensionClass-like classes.
These tests are to make sure we do something sane in the presence of
classic ExtensionClass classes and instances.
"""
import unittest
from zope.interface import Interface
from zope.interface import classImplements
from zope.interface import classImplementsOnly
from zope.interface import directlyProvidedBy
from zope.interface import directlyProvides
from zope.interface import implementedBy
from zope.interface import implementer
from zope.interface import providedBy
from . import odd
class I1(Interface):
pass
class I2(Interface):
pass
class I3(Interface):
pass
class I31(I3):
pass
class I4(Interface):
pass
class I5(Interface):
pass
class Odd:
pass
Odd = odd.MetaClass('Odd', Odd.__bases__, {})
class B(Odd):
__implemented__ = I2
# TODO: We are going to need more magic to make classProvides work with odd
# classes. This will work in the next iteration. For now, we'll use
# a different mechanism.
# from zope.interface import classProvides
class A(Odd):
pass
classImplements(A, I1)
class C(A, B):
pass
classImplements(C, I31)
class Test(unittest.TestCase):
def test_ObjectSpecification(self):
c = C()
directlyProvides(c, I4)
self.assertEqual([i.getName() for i in providedBy(c)],
['I4', 'I31', 'I1', 'I2']
)
self.assertEqual([i.getName() for i in providedBy(c).flattened()],
['I4', 'I31', 'I3', 'I1', 'I2', 'Interface']
)
self.assertIn(I1, providedBy(c))
self.assertNotIn(I3, providedBy(c))
self.assertTrue(providedBy(c).extends(I3))
self.assertTrue(providedBy(c).extends(I31))
self.assertFalse(providedBy(c).extends(I5))
class COnly(A, B):
pass
classImplementsOnly(COnly, I31)
class D(COnly):
pass
classImplements(D, I5)
classImplements(D, I5)
c = D()
directlyProvides(c, I4)
self.assertEqual([i.getName() for i in providedBy(c)],
['I4', 'I5', 'I31'])
self.assertEqual([i.getName() for i in providedBy(c).flattened()],
['I4', 'I5', 'I31', 'I3', 'Interface'])
self.assertNotIn(I1, providedBy(c))
self.assertNotIn(I3, providedBy(c))
self.assertTrue(providedBy(c).extends(I3))
self.assertFalse(providedBy(c).extends(I1))
self.assertTrue(providedBy(c).extends(I31))
self.assertTrue(providedBy(c).extends(I5))
class COnly(A, B):
__implemented__ = I31
class D(COnly):
pass
classImplements(D, I5)
classImplements(D, I5)
c = D()
directlyProvides(c, I4)
self.assertEqual([i.getName() for i in providedBy(c)],
['I4', 'I5', 'I31'])
self.assertEqual([i.getName() for i in providedBy(c).flattened()],
['I4', 'I5', 'I31', 'I3', 'Interface'])
self.assertNotIn(I1, providedBy(c))
self.assertNotIn(I3, providedBy(c))
self.assertTrue(providedBy(c).extends(I3))
self.assertFalse(providedBy(c).extends(I1))
self.assertTrue(providedBy(c).extends(I31))
self.assertTrue(providedBy(c).extends(I5))
def test_classImplements(self):
@implementer(I3)
class A(Odd):
pass
@implementer(I4)
class B(Odd):
pass
class C(A, B):
pass
classImplements(C, I1, I2)
self.assertEqual([i.getName() for i in implementedBy(C)],
['I1', 'I2', 'I3', 'I4'])
classImplements(C, I5)
self.assertEqual([i.getName() for i in implementedBy(C)],
['I1', 'I2', 'I5', 'I3', 'I4'])
def test_classImplementsOnly(self):
@implementer(I3)
class A(Odd):
pass
@implementer(I4)
class B(Odd):
pass
class C(A, B):
pass
classImplementsOnly(C, I1, I2)
self.assertEqual([i.__name__ for i in implementedBy(C)],
['I1', 'I2'])
def test_directlyProvides(self):
class IA1(Interface):
pass
class IA2(Interface):
pass
class IB(Interface):
pass
class IC(Interface):
pass
class A(Odd):
pass
classImplements(A, IA1, IA2)
class B(Odd):
pass
classImplements(B, IB)
class C(A, B):
pass
classImplements(C, IC)
ob = C()
directlyProvides(ob, I1, I2)
self.assertIn(I1, providedBy(ob))
self.assertIn(I2, providedBy(ob))
self.assertIn(IA1, providedBy(ob))
self.assertIn(IA2, providedBy(ob))
self.assertIn(IB, providedBy(ob))
self.assertIn(IC, providedBy(ob))
directlyProvides(ob, directlyProvidedBy(ob) - I2)
self.assertIn(I1, providedBy(ob))
self.assertNotIn(I2, providedBy(ob))
self.assertNotIn(I2, providedBy(ob))
directlyProvides(ob, directlyProvidedBy(ob), I2)
self.assertIn(I2, providedBy(ob))
# see above
# def TODO_test_classProvides_fails_for_odd_class(self):
# try:
# class A(Odd):
# classProvides(I1)
# except TypeError:
# pass # Success
# self.assert_(
# False,
# "Shouldn't be able to use directlyProvides on odd class."
# )
def test_implementedBy(self):
class I2(I1):
pass
class C1(Odd):
pass
classImplements(C1, I2)
class C2(C1):
pass
classImplements(C2, I3)
self.assertEqual([i.getName() for i in implementedBy(C2)],
['I3', 'I2'])
def test_odd_metaclass_that_doesnt_subclass_type(self):
# This was originally a doctest in odd.py.
# It verifies that the metaclass the rest of these tests use
# works as expected.
# This is used for testing support for ExtensionClass in new
# interfaces.
class A:
a = 1
A = odd.MetaClass('A', A.__bases__, A.__dict__)
class B:
b = 1
B = odd.MetaClass('B', B.__bases__, B.__dict__)
class C(A, B):
pass
self.assertEqual(C.__bases__, (A, B))
a = A()
aa = A()
self.assertEqual(a.a, 1)
self.assertEqual(aa.a, 1)
aa.a = 2
self.assertEqual(a.a, 1)
self.assertEqual(aa.a, 2)
c = C()
self.assertEqual(c.a, 1)
self.assertEqual(c.b, 1)
c.b = 2
self.assertEqual(c.b, 2)
C.c = 1
self.assertEqual(c.c, 1)
c.c
self.assertIs(C.__class__.__class__, C.__class__)
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