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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.tests import odd from zope.interface import Interface from zope.interface import implementer from zope.interface import directlyProvides from zope.interface import providedBy from zope.interface import directlyProvidedBy from zope.interface import classImplements from zope.interface import classImplementsOnly from zope.interface import implementedBy 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.assertTrue(I1 in providedBy(c)) self.assertFalse(I3 in 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.assertFalse(I1 in providedBy(c)) self.assertFalse(I3 in 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.assertFalse(I1 in providedBy(c)) self.assertFalse(I3 in 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.assertTrue(I1 in providedBy(ob)) self.assertTrue(I2 in providedBy(ob)) self.assertTrue(IA1 in providedBy(ob)) self.assertTrue(IA2 in providedBy(ob)) self.assertTrue(IB in providedBy(ob)) self.assertTrue(IC in providedBy(ob)) directlyProvides(ob, directlyProvidedBy(ob)-I2) self.assertTrue(I1 in providedBy(ob)) self.assertFalse(I2 in providedBy(ob)) self.assertFalse(I2 in providedBy(ob)) directlyProvides(ob, directlyProvidedBy(ob), I2) self.assertTrue(I2 in 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__)