355 lines
10 KiB
Python
355 lines
10 KiB
Python
##############################################################################
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#
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# Copyright (c) 2003 Zope Foundation and Contributors.
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# All Rights Reserved.
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#
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# This software is subject to the provisions of the Zope Public License,
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# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
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# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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# FOR A PARTICULAR PURPOSE.
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#
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##############################################################################
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"""Tests for advice
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This module was adapted from 'protocols.tests.advice', part of the Python
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Enterprise Application Kit (PEAK). Please notify the PEAK authors
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(pje@telecommunity.com and tsarna@sarna.org) if bugs are found or
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Zope-specific changes are required, so that the PEAK version of this module
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can be kept in sync.
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PEAK is a Python application framework that interoperates with (but does
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not require) Zope 3 and Twisted. It provides tools for manipulating UML
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models, object-relational persistence, aspect-oriented programming, and more.
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Visit the PEAK home page at http://peak.telecommunity.com for more information.
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"""
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import unittest
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import sys
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from zope.interface._compat import _skip_under_py2
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from zope.interface._compat import _skip_under_py3k
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class FrameInfoTest(unittest.TestCase):
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def test_w_module(self):
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from zope.interface.tests import advisory_testing
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(kind, module,
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f_locals, f_globals) = advisory_testing.moduleLevelFrameInfo
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self.assertEqual(kind, "module")
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for d in module.__dict__, f_locals, f_globals:
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self.assertTrue(d is advisory_testing.my_globals)
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@_skip_under_py3k
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def test_w_ClassicClass(self):
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from zope.interface.tests import advisory_testing
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(kind,
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module,
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f_locals,
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f_globals) = advisory_testing.ClassicClass.classLevelFrameInfo
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self.assertEqual(kind, "class")
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self.assertTrue(
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f_locals is advisory_testing.ClassicClass.__dict__) # ???
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for d in module.__dict__, f_globals:
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self.assertTrue(d is advisory_testing.my_globals)
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def test_w_NewStyleClass(self):
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from zope.interface.tests import advisory_testing
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(kind,
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module,
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f_locals,
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f_globals) = advisory_testing.NewStyleClass.classLevelFrameInfo
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self.assertEqual(kind, "class")
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for d in module.__dict__, f_globals:
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self.assertTrue(d is advisory_testing.my_globals)
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def test_inside_function_call(self):
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from zope.interface.advice import getFrameInfo
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kind, module, f_locals, f_globals = getFrameInfo(sys._getframe())
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self.assertEqual(kind, "function call")
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self.assertTrue(f_locals is locals()) # ???
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for d in module.__dict__, f_globals:
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self.assertTrue(d is globals())
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def test_inside_exec(self):
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from zope.interface.advice import getFrameInfo
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_globals = {'getFrameInfo': getFrameInfo}
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_locals = {}
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exec(_FUNKY_EXEC, _globals, _locals)
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self.assertEqual(_locals['kind'], "exec")
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self.assertTrue(_locals['f_locals'] is _locals)
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self.assertTrue(_locals['module'] is None)
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self.assertTrue(_locals['f_globals'] is _globals)
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_FUNKY_EXEC = """\
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import sys
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kind, module, f_locals, f_globals = getFrameInfo(sys._getframe())
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"""
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class AdviceTests(unittest.TestCase):
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@_skip_under_py3k
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def test_order(self):
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from zope.interface.tests.advisory_testing import ping
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log = []
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class Foo(object):
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ping(log, 1)
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ping(log, 2)
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ping(log, 3)
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# Strip the list nesting
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for i in 1, 2, 3:
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self.assertTrue(isinstance(Foo, list))
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Foo, = Foo
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self.assertEqual(log, [(1, Foo), (2, [Foo]), (3, [[Foo]])])
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@_skip_under_py3k
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def test_single_explicit_meta(self):
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from zope.interface.tests.advisory_testing import ping
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class Metaclass(type):
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pass
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class Concrete(Metaclass):
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__metaclass__ = Metaclass
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ping([],1)
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Concrete, = Concrete
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self.assertTrue(Concrete.__class__ is Metaclass)
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@_skip_under_py3k
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def test_mixed_metas(self):
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from zope.interface.tests.advisory_testing import ping
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class Metaclass1(type):
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pass
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class Metaclass2(type):
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pass
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class Base1:
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__metaclass__ = Metaclass1
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class Base2:
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__metaclass__ = Metaclass2
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try:
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class Derived(Base1, Base2):
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ping([], 1)
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self.fail("Should have gotten incompatibility error")
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except TypeError:
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pass
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class Metaclass3(Metaclass1, Metaclass2):
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pass
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class Derived(Base1, Base2):
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__metaclass__ = Metaclass3
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ping([], 1)
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self.assertTrue(isinstance(Derived, list))
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Derived, = Derived
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self.assertTrue(isinstance(Derived, Metaclass3))
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@_skip_under_py3k
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def test_meta_no_bases(self):
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from zope.interface.tests.advisory_testing import ping
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from types import ClassType
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class Thing:
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ping([], 1)
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klass, = Thing # unpack list created by pong
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self.assertEqual(type(klass), ClassType)
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class Test_isClassAdvisor(unittest.TestCase):
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def _callFUT(self, *args, **kw):
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from zope.interface.advice import isClassAdvisor
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return isClassAdvisor(*args, **kw)
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def test_w_non_function(self):
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self.assertEqual(self._callFUT(self), False)
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def test_w_normal_function(self):
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def foo():
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raise NotImplementedError()
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self.assertEqual(self._callFUT(foo), False)
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def test_w_advisor_function(self):
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def bar():
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raise NotImplementedError()
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bar.previousMetaclass = object()
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self.assertEqual(self._callFUT(bar), True)
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class Test_determineMetaclass(unittest.TestCase):
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def _callFUT(self, *args, **kw):
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from zope.interface.advice import determineMetaclass
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return determineMetaclass(*args, **kw)
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@_skip_under_py3k
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def test_empty(self):
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from types import ClassType
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self.assertEqual(self._callFUT(()), ClassType)
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def test_empty_w_explicit_metatype(self):
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class Meta(type):
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pass
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self.assertEqual(self._callFUT((), Meta), Meta)
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def test_single(self):
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class Meta(type):
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pass
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self.assertEqual(self._callFUT((Meta,)), type)
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@_skip_under_py3k
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def test_meta_of_class(self):
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class Metameta(type):
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pass
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class Meta(type):
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__metaclass__ = Metameta
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self.assertEqual(self._callFUT((Meta, type)), Metameta)
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@_skip_under_py2
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def test_meta_of_class_py3k(self):
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# Work around SyntaxError under Python2.
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EXEC = '\n'.join([
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'class Metameta(type):',
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' pass',
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'class Meta(type, metaclass=Metameta):',
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' pass',
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])
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globs = {}
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exec(EXEC, globs)
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Meta = globs['Meta']
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Metameta = globs['Metameta']
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self.assertEqual(self._callFUT((Meta, type)), Metameta)
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@_skip_under_py3k
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def test_multiple_in_hierarchy(self):
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class Meta_A(type):
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pass
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class Meta_B(Meta_A):
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pass
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class A(type):
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__metaclass__ = Meta_A
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class B(type):
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__metaclass__ = Meta_B
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self.assertEqual(self._callFUT((A, B,)), Meta_B)
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@_skip_under_py2
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def test_multiple_in_hierarchy_py3k(self):
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# Work around SyntaxError under Python2.
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EXEC = '\n'.join([
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'class Meta_A(type):',
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' pass',
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'class Meta_B(Meta_A):',
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' pass',
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'class A(type, metaclass=Meta_A):',
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' pass',
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'class B(type, metaclass=Meta_B):',
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' pass',
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])
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globs = {}
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exec(EXEC, globs)
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Meta_A = globs['Meta_A']
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Meta_B = globs['Meta_B']
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A = globs['A']
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B = globs['B']
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self.assertEqual(self._callFUT((A, B)), Meta_B)
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@_skip_under_py3k
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def test_multiple_not_in_hierarchy(self):
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class Meta_A(type):
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pass
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class Meta_B(type):
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pass
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class A(type):
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__metaclass__ = Meta_A
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class B(type):
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__metaclass__ = Meta_B
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self.assertRaises(TypeError, self._callFUT, (A, B,))
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@_skip_under_py2
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def test_multiple_not_in_hierarchy_py3k(self):
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# Work around SyntaxError under Python2.
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EXEC = '\n'.join([
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'class Meta_A(type):',
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' pass',
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'class Meta_B(type):',
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' pass',
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'class A(type, metaclass=Meta_A):',
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' pass',
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'class B(type, metaclass=Meta_B):',
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' pass',
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])
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globs = {}
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exec(EXEC, globs)
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Meta_A = globs['Meta_A']
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Meta_B = globs['Meta_B']
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A = globs['A']
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B = globs['B']
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self.assertRaises(TypeError, self._callFUT, (A, B))
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class Test_minimalBases(unittest.TestCase):
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def _callFUT(self, klasses):
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from zope.interface.advice import minimalBases
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return minimalBases(klasses)
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def test_empty(self):
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self.assertEqual(self._callFUT([]), [])
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@_skip_under_py3k
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def test_w_oldstyle_meta(self):
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class C:
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pass
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self.assertEqual(self._callFUT([type(C)]), [])
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@_skip_under_py3k
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def test_w_oldstyle_class(self):
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class C:
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pass
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self.assertEqual(self._callFUT([C]), [C])
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def test_w_newstyle_meta(self):
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self.assertEqual(self._callFUT([type]), [type])
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def test_w_newstyle_class(self):
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class C(object):
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pass
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self.assertEqual(self._callFUT([C]), [C])
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def test_simple_hierarchy_skips_implied(self):
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class A(object):
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pass
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class B(A):
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pass
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class C(B):
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pass
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class D(object):
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pass
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self.assertEqual(self._callFUT([A, B, C]), [C])
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self.assertEqual(self._callFUT([A, C]), [C])
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self.assertEqual(self._callFUT([B, C]), [C])
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self.assertEqual(self._callFUT([A, B]), [B])
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self.assertEqual(self._callFUT([D, B, D]), [B, D])
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def test_repeats_kicked_to_end_of_queue(self):
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class A(object):
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pass
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class B(object):
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pass
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self.assertEqual(self._callFUT([A, B, A]), [B, A])
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