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Current File : /lib/python2.7/site-packages/zope/component/tests/test__declaration.py

##############################################################################
#
# Copyright (c) 2012 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 adapter declaration helpers
"""
import unittest

class Test_adapter(unittest.TestCase):

    def _getTargetClass(self):
        from zope.component._declaration import adapter
        return adapter

    def _makeOne(self, *interfaces):
        return self._getTargetClass()(*interfaces)

    def test_ctor_no_interfaces(self):
        deco = self._makeOne()
        self.assertEqual(list(deco.interfaces), [])

    def test_ctor_w_interfaces(self):
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        deco = self._makeOne(IFoo, IBar)
        self.assertEqual(list(deco.interfaces), [IFoo, IBar])

    def test__call___w_class(self):
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        @self._makeOne(IFoo, IBar)
        class Baz(object):
            pass
        self.assertEqual(Baz.__component_adapts__, (IFoo, IBar))

    def test__call___w_inst_of_decorated_class(self):
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        @self._makeOne(IFoo, IBar)
        class Baz(object):
            pass
        baz = Baz()
        self.assertRaises(AttributeError,
                          getattr, baz, '__component_adapts_')

    def test__call___w_non_class(self):
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        class Baz(object):
            pass
        deco = self._makeOne(IFoo, IBar)
        baz = deco(Baz())
        self.assertEqual(baz.__component_adapts__, (IFoo, IBar))


class Test_adapts(unittest.TestCase):

    def _run_generated_code(self, code, globs, locs,
                            fails_under_py3k=True,
                           ):
        import warnings
        #from zope.component._compat import PYTHON3
        PYTHON3 = False
        with warnings.catch_warnings(record=True) as log:
            warnings.resetwarnings()
            if not PYTHON3:
                exec(code, globs, locs)
                self.assertEqual(len(log), 0) # no longer warn
                return True
            else:
                try:
                    exec(code, globs, locs)
                except TypeError:
                    return False
                else:
                    if fails_under_py3k:
                        self.fail("Didn't raise TypeError")

    def test_instances_not_affected(self):
        from zope.component._declaration import adapts
        class C(object):
            adapts()

        self.assertEqual(C.__component_adapts__, ())
        def _try():
            return C().__component_adapts__
        self.assertRaises(AttributeError, _try)

    def test_called_from_function(self):
        import warnings
        from zope.component._declaration import adapts
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        globs = {'adapts': adapts, 'IFoo': IFoo}
        locs = {}
        CODE = "\n".join([
            'def foo():',
            '    adapts(IFoo)'
            ])
        if self._run_generated_code(CODE, globs, locs, False):
            foo = locs['foo']
            with warnings.catch_warnings(record=True) as log:
                warnings.resetwarnings()
                self.assertRaises(TypeError, foo)
                self.assertEqual(len(log), 0) # no longer warn

    def test_called_twice_from_class(self):
        import warnings
        from zope.component._declaration import adapts
        from zope.interface import Interface
        from zope.interface._compat import PYTHON3
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        globs = {'adapts': adapts, 'IFoo': IFoo, 'IBar': IBar}
        locs = {}
        CODE = "\n".join([
            'class Foo(object):',
            '    adapts(IFoo)',
            '    adapts(IBar)',
            ])
        with warnings.catch_warnings(record=True) as log:
            warnings.resetwarnings()
            try:
                exec(CODE, globs, locs)
            except TypeError:
                if not PYTHON3:
                    self.assertEqual(len(log), 0) # no longer warn
            else:
                self.fail("Didn't raise TypeError")

    def test_called_once_from_class(self):
        from zope.component._declaration import adapts
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        globs = {'adapts': adapts, 'IFoo': IFoo}
        locs = {}
        CODE = "\n".join([
            'class Foo(object):',
            '    adapts(IFoo)',
            ])
        if self._run_generated_code(CODE, globs, locs):
            Foo = locs['Foo']
            spec = Foo.__component_adapts__
            self.assertEqual(list(spec), [IFoo])


class Test_adaptedBy(unittest.TestCase):

    def _callFUT(self, obj):
        from zope.component._declaration import adaptedBy
        return adaptedBy(obj)

    def test_obj_w_no_attr(self):
        self.assertEqual(self._callFUT(object()), None)

    def test__call___w_class(self):
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        class Baz(object):
            __component_adapts__ = (IFoo, IBar)
        self.assertEqual(self._callFUT(Baz), (IFoo, IBar))

    def test__call___w_inst_of_decorated_class(self):
        from zope.interface import Interface
        from zope.component._declaration import _adapts_descr
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        class Baz(object):
            __component_adapts__ = _adapts_descr((IFoo, IBar))
        baz = Baz()
        self.assertEqual(self._callFUT(baz), None)

    def test__call___w_non_class(self):
        from zope.interface import Interface
        class IFoo(Interface):
            pass
        class IBar(Interface):
            pass
        class Baz(object):
            pass
        baz = Baz()
        baz.__component_adapts__ = (IFoo, IBar)
        self.assertEqual(self._callFUT(baz), (IFoo, IBar))


def test_suite():
    return unittest.TestSuite((
        unittest.makeSuite(Test_adapter),
        unittest.makeSuite(Test_adapts),
        unittest.makeSuite(Test_adaptedBy),
    ))

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