Added printing requirements

zope/interface/tests/test_odd_declarations.py

@@ -0,0 +1,227 @@
+##############################################################################
+#
+# 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
+from zope.interface._compat import _skip_under_py3k
+
+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(object): __metaclass__ = odd.MetaClass
+
+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 failUnless(self, expr): # silence deprecation warnings under py3
+        return self.assertTrue(expr)
+
+    def failIf(self, expr): # silence deprecation warnings under py3
+        return self.assertFalse(expr)
+
+    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.failUnless(I1 in providedBy(c))
+        self.failIf(I3 in providedBy(c))
+        self.failUnless(providedBy(c).extends(I3))
+        self.failUnless(providedBy(c).extends(I31))
+        self.failIf(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.failIf(I1 in providedBy(c))
+        self.failIf(I3 in providedBy(c))
+        self.failUnless(providedBy(c).extends(I3))
+        self.failIf(providedBy(c).extends(I1))
+        self.failUnless(providedBy(c).extends(I31))
+        self.failUnless(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.failIf(I1 in providedBy(c))
+        self.failIf(I3 in providedBy(c))
+        self.failUnless(providedBy(c).extends(I3))
+        self.failIf(providedBy(c).extends(I1))
+        self.failUnless(providedBy(c).extends(I31))
+        self.failUnless(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.failUnless(I1 in providedBy(ob))
+        self.failUnless(I2 in providedBy(ob))
+        self.failUnless(IA1 in providedBy(ob))
+        self.failUnless(IA2 in providedBy(ob))
+        self.failUnless(IB in providedBy(ob))
+        self.failUnless(IC in providedBy(ob))
+
+        directlyProvides(ob, directlyProvidedBy(ob)-I2)
+        self.failUnless(I1 in providedBy(ob))
+        self.failIf(I2 in providedBy(ob))
+        self.failIf(I2 in providedBy(ob))
+        directlyProvides(ob, directlyProvidedBy(ob), I2)
+        self.failUnless(I2 in providedBy(ob))
+
+    @_skip_under_py3k
+    def test_directlyProvides_fails_for_odd_class(self):
+        self.assertRaises(TypeError, directlyProvides, C, I5)
+
+    # see above
+    #def TODO_test_classProvides_fails_for_odd_class(self):
+    #    try:
+    #        class A(Odd):
+    #            classProvides(I1)
+    #    except TypeError:
+    #        pass # Sucess
+    #    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_suite():
+    import doctest
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(Test))
+    suite.addTest(doctest.DocTestSuite(odd))
+    return suite