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diff --git a/contrib/python/zope.interface/py2/zope/interface/tests/test_advice.py b/contrib/python/zope.interface/py2/zope/interface/tests/test_advice.py
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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.
+#
+##############################################################################
+"""Tests for advice
+
+This module was adapted from 'protocols.tests.advice', part of the Python
+Enterprise Application Kit (PEAK).  Please notify the PEAK authors
+(pje@telecommunity.com and tsarna@sarna.org) if bugs are found or
+Zope-specific changes are required, so that the PEAK version of this module
+can be kept in sync.
+
+PEAK is a Python application framework that interoperates with (but does
+not require) Zope 3 and Twisted.  It provides tools for manipulating UML
+models, object-relational persistence, aspect-oriented programming, and more.
+Visit the PEAK home page at http://peak.telecommunity.com for more information.
+"""
+
+import unittest
+import sys
+
+from zope.interface._compat import _skip_under_py2
+from zope.interface._compat import _skip_under_py3k
+
+
+class FrameInfoTest(unittest.TestCase):
+
+    def test_w_module(self):
+        from . import advisory_testing
+        (kind, module,
+         f_locals, f_globals) = advisory_testing.moduleLevelFrameInfo
+        self.assertEqual(kind, "module")
+        for d in module.__dict__, f_locals, f_globals:
+            self.assertTrue(d is advisory_testing.my_globals)
+
+    @_skip_under_py3k
+    def test_w_ClassicClass(self):
+        from . import advisory_testing
+        (kind,
+         module,
+         f_locals,
+         f_globals) = advisory_testing.ClassicClass.classLevelFrameInfo
+        self.assertEqual(kind, "class")
+
+        self.assertTrue(
+            f_locals is advisory_testing.ClassicClass.__dict__)  # ???
+        for d in module.__dict__, f_globals:
+            self.assertTrue(d is advisory_testing.my_globals)
+
+    def test_w_NewStyleClass(self):
+        from . import advisory_testing
+        (kind,
+         module,
+         f_locals,
+         f_globals) = advisory_testing.NewStyleClass.classLevelFrameInfo
+        self.assertEqual(kind, "class")
+
+        for d in module.__dict__, f_globals:
+            self.assertTrue(d is advisory_testing.my_globals)
+
+    def test_inside_function_call(self):
+        from zope.interface.advice import getFrameInfo
+        kind, module, f_locals, f_globals = getFrameInfo(sys._getframe())
+        self.assertEqual(kind, "function call")
+        self.assertTrue(f_locals is locals()) # ???
+        for d in module.__dict__, f_globals:
+            self.assertTrue(d is globals())
+
+    def test_inside_exec(self):
+        from zope.interface.advice import getFrameInfo
+        _globals = {'getFrameInfo': getFrameInfo}
+        _locals = {}
+        exec(_FUNKY_EXEC, _globals, _locals)
+        self.assertEqual(_locals['kind'], "exec")
+        self.assertTrue(_locals['f_locals'] is _locals)
+        self.assertTrue(_locals['module'] is None)
+        self.assertTrue(_locals['f_globals'] is _globals)
+
+
+_FUNKY_EXEC = """\
+import sys
+kind, module, f_locals, f_globals = getFrameInfo(sys._getframe())
+"""
+
+class AdviceTests(unittest.TestCase):
+
+    @_skip_under_py3k
+    def test_order(self):
+        from .advisory_testing import ping
+        log = []
+        class Foo(object):
+            ping(log, 1)
+            ping(log, 2)
+            ping(log, 3)
+
+        # Strip the list nesting
+        for i in 1, 2, 3:
+            self.assertTrue(isinstance(Foo, list))
+            Foo, = Foo
+
+        self.assertEqual(log, [(1, Foo), (2, [Foo]), (3, [[Foo]])])
+
+    @_skip_under_py3k
+    def test_single_explicit_meta(self):
+        from .advisory_testing import ping
+
+        class Metaclass(type):
+            pass
+
+        class Concrete(Metaclass):
+            __metaclass__ = Metaclass
+            ping([],1)
+
+        Concrete, = Concrete
+        self.assertTrue(Concrete.__class__ is Metaclass)
+
+
+    @_skip_under_py3k
+    def test_mixed_metas(self):
+        from .advisory_testing import ping
+
+        class Metaclass1(type):
+            pass
+
+        class Metaclass2(type):
+            pass
+
+        class Base1:
+            __metaclass__ = Metaclass1
+
+        class Base2:
+            __metaclass__ = Metaclass2
+
+        try:
+            class Derived(Base1, Base2):
+                ping([], 1)
+            self.fail("Should have gotten incompatibility error")
+        except TypeError:
+            pass
+
+        class Metaclass3(Metaclass1, Metaclass2):
+            pass
+
+        class Derived(Base1, Base2):
+            __metaclass__ = Metaclass3
+            ping([], 1)
+
+        self.assertTrue(isinstance(Derived, list))
+        Derived, = Derived
+        self.assertTrue(isinstance(Derived, Metaclass3))
+
+    @_skip_under_py3k
+    def test_meta_no_bases(self):
+        from .advisory_testing import ping
+        from types import ClassType
+        class Thing:
+            ping([], 1)
+        klass, = Thing # unpack list created by pong
+        self.assertEqual(type(klass), ClassType)
+
+
+class Test_isClassAdvisor(unittest.TestCase):
+
+    def _callFUT(self, *args, **kw):
+        from zope.interface.advice import isClassAdvisor
+        return isClassAdvisor(*args, **kw)
+
+    def test_w_non_function(self):
+        self.assertEqual(self._callFUT(self), False)
+
+    def test_w_normal_function(self):
+        def foo():
+            raise NotImplementedError()
+        self.assertEqual(self._callFUT(foo), False)
+
+    def test_w_advisor_function(self):
+        def bar():
+            raise NotImplementedError()
+        bar.previousMetaclass = object()
+        self.assertEqual(self._callFUT(bar), True)
+
+
+class Test_determineMetaclass(unittest.TestCase):
+
+    def _callFUT(self, *args, **kw):
+        from zope.interface.advice import determineMetaclass
+        return determineMetaclass(*args, **kw)
+
+    @_skip_under_py3k
+    def test_empty(self):
+        from types import ClassType
+        self.assertEqual(self._callFUT(()), ClassType)
+
+    def test_empty_w_explicit_metatype(self):
+        class Meta(type):
+            pass
+        self.assertEqual(self._callFUT((), Meta), Meta)
+
+    def test_single(self):
+        class Meta(type):
+            pass
+        self.assertEqual(self._callFUT((Meta,)), type)
+
+    @_skip_under_py3k
+    def test_meta_of_class(self):
+        class Metameta(type):
+            pass
+
+        class Meta(type):
+            __metaclass__ = Metameta
+
+        self.assertEqual(self._callFUT((Meta, type)), Metameta)
+
+    @_skip_under_py2
+    def test_meta_of_class_py3k(self):
+        # Work around SyntaxError under Python2.
+        EXEC = '\n'.join([
+        'class Metameta(type):',
+        '    pass',
+        'class Meta(type, metaclass=Metameta):',
+        '    pass',
+        ])
+        globs = {}
+        exec(EXEC, globs)
+        Meta = globs['Meta']
+        Metameta = globs['Metameta']
+
+        self.assertEqual(self._callFUT((Meta, type)), Metameta)
+
+    @_skip_under_py3k
+    def test_multiple_in_hierarchy(self):
+        class Meta_A(type):
+            pass
+        class Meta_B(Meta_A):
+            pass
+        class A(type):
+            __metaclass__ = Meta_A
+        class B(type):
+            __metaclass__ = Meta_B
+        self.assertEqual(self._callFUT((A, B,)), Meta_B)
+
+    @_skip_under_py2
+    def test_multiple_in_hierarchy_py3k(self):
+        # Work around SyntaxError under Python2.
+        EXEC = '\n'.join([
+        'class Meta_A(type):',
+        '    pass',
+        'class Meta_B(Meta_A):',
+        '    pass',
+        'class A(type, metaclass=Meta_A):',
+        '    pass',
+        'class B(type, metaclass=Meta_B):',
+        '    pass',
+        ])
+        globs = {}
+        exec(EXEC, globs)
+        Meta_A = globs['Meta_A']
+        Meta_B = globs['Meta_B']
+        A = globs['A']
+        B = globs['B']
+        self.assertEqual(self._callFUT((A, B)), Meta_B)
+
+    @_skip_under_py3k
+    def test_multiple_not_in_hierarchy(self):
+        class Meta_A(type):
+            pass
+        class Meta_B(type):
+            pass
+        class A(type):
+            __metaclass__ = Meta_A
+        class B(type):
+            __metaclass__ = Meta_B
+        self.assertRaises(TypeError, self._callFUT, (A, B,))
+
+    @_skip_under_py2
+    def test_multiple_not_in_hierarchy_py3k(self):
+        # Work around SyntaxError under Python2.
+        EXEC = '\n'.join([
+        'class Meta_A(type):',
+        '    pass',
+        'class Meta_B(type):',
+        '    pass',
+        'class A(type, metaclass=Meta_A):',
+        '    pass',
+        'class B(type, metaclass=Meta_B):',
+        '    pass',
+        ])
+        globs = {}
+        exec(EXEC, globs)
+        Meta_A = globs['Meta_A']
+        Meta_B = globs['Meta_B']
+        A = globs['A']
+        B = globs['B']
+        self.assertRaises(TypeError, self._callFUT, (A, B))
+
+
+class Test_minimalBases(unittest.TestCase):
+
+    def _callFUT(self, klasses):
+        from zope.interface.advice import minimalBases
+        return minimalBases(klasses)
+
+    def test_empty(self):
+        self.assertEqual(self._callFUT([]), [])
+
+    @_skip_under_py3k
+    def test_w_oldstyle_meta(self):
+        class C:
+            pass
+        self.assertEqual(self._callFUT([type(C)]), [])
+
+    @_skip_under_py3k
+    def test_w_oldstyle_class(self):
+        class C:
+            pass
+        self.assertEqual(self._callFUT([C]), [C])
+
+    def test_w_newstyle_meta(self):
+        self.assertEqual(self._callFUT([type]), [type])
+
+    def test_w_newstyle_class(self):
+        class C(object):
+            pass
+        self.assertEqual(self._callFUT([C]), [C])
+
+    def test_simple_hierarchy_skips_implied(self):
+        class A(object):
+            pass
+        class B(A):
+            pass
+        class C(B):
+            pass
+        class D(object):
+            pass
+        self.assertEqual(self._callFUT([A, B, C]), [C])
+        self.assertEqual(self._callFUT([A, C]), [C])
+        self.assertEqual(self._callFUT([B, C]), [C])
+        self.assertEqual(self._callFUT([A, B]), [B])
+        self.assertEqual(self._callFUT([D, B, D]), [B, D])
+
+    def test_repeats_kicked_to_end_of_queue(self):
+        class A(object):
+            pass
+        class B(object):
+            pass
+        self.assertEqual(self._callFUT([A, B, A]), [B, A])