Current File : //usr/lib/python3/dist-packages/zope/interface/tests/test_exceptions.py
##############################################################################
#
# Copyright (c) 2010 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.
#
##############################################################################
""" zope.interface.exceptions unit tests
"""
import unittest
def _makeIface():
from zope.interface import Interface
class IDummy(Interface):
pass
return IDummy
class DoesNotImplementTests(unittest.TestCase):
def _getTargetClass(self):
from zope.interface.exceptions import DoesNotImplement
return DoesNotImplement
def _makeOne(self, *args):
iface = _makeIface()
return self._getTargetClass()(iface, *args)
def test___str__(self):
dni = self._makeOne()
self.assertEqual(
str(dni),
"An object has failed to implement interface "
"zope.interface.tests.test_exceptions.IDummy: "
"Does not declaratively implement the interface."
)
def test___str__w_candidate(self):
dni = self._makeOne('candidate')
self.assertEqual(
str(dni),
"The object 'candidate' has failed to implement interface "
"zope.interface.tests.test_exceptions.IDummy: "
"Does not declaratively implement the interface."
)
class BrokenImplementationTests(unittest.TestCase):
def _getTargetClass(self):
from zope.interface.exceptions import BrokenImplementation
return BrokenImplementation
def _makeOne(self, *args):
iface = _makeIface()
return self._getTargetClass()(iface, 'missing', *args)
def test___str__(self):
dni = self._makeOne()
self.assertEqual(
str(dni),
'An object has failed to implement interface '
'zope.interface.tests.test_exceptions.IDummy: '
"The 'missing' attribute was not provided.")
def test___str__w_candidate(self):
dni = self._makeOne('candidate')
self.assertEqual(
str(dni),
'The object \'candidate\' has failed to implement interface '
'zope.interface.tests.test_exceptions.IDummy: '
"The 'missing' attribute was not provided.")
def broken_function():
"""
This is a global function with a simple argument list.
It exists to be able to report the same information when
formatting signatures under Python 2 and Python 3.
"""
class BrokenMethodImplementationTests(unittest.TestCase):
def _getTargetClass(self):
from zope.interface.exceptions import BrokenMethodImplementation
return BrokenMethodImplementation
message = 'I said so'
def _makeOne(self, *args):
return self._getTargetClass()('aMethod', self.message, *args)
def test___str__(self):
dni = self._makeOne()
self.assertEqual(
str(dni),
"An object has failed to implement interface <Unknown>: "
"The contract of 'aMethod' is violated because I said so."
)
def test___str__w_candidate_no_implementation(self):
dni = self._makeOne('some_function', '<IFoo>', 'candidate')
self.assertEqual(
str(dni),
"The object 'candidate' has failed to implement interface <IFoo>: "
"The contract of 'aMethod' is violated because I said so."
)
def test___str__w_candidate_w_implementation(self):
self.message = 'implementation is wonky'
dni = self._makeOne(broken_function, '<IFoo>', 'candidate')
self.assertEqual(
str(dni),
"The object 'candidate' has failed to implement interface <IFoo>: "
"The contract of 'aMethod' is violated because "
"'broken_function()' is wonky."
)
def test___str__w_candidate_w_implementation_not_callable(self):
self.message = 'implementation is not callable'
dni = self._makeOne(42, '<IFoo>', 'candidate')
self.assertEqual(
str(dni),
"The object 'candidate' has failed to implement interface <IFoo>: "
"The contract of 'aMethod' is violated because "
"'42' is not callable."
)
def test___repr__w_candidate(self):
dni = self._makeOne(None, 'candidate')
self.assertEqual(
repr(dni),
"BrokenMethodImplementation('aMethod', 'I said so', None, 'candidate')"
)
class MultipleInvalidTests(unittest.TestCase):
def _getTargetClass(self):
from zope.interface.exceptions import MultipleInvalid
return MultipleInvalid
def _makeOne(self, excs):
iface = _makeIface()
return self._getTargetClass()(iface, 'target', excs)
def test__str__(self):
from zope.interface.exceptions import BrokenMethodImplementation
excs = [
BrokenMethodImplementation('aMethod', 'I said so'),
Exception("Regular exception")
]
dni = self._makeOne(excs)
self.assertEqual(
str(dni),
"The object 'target' has failed to implement interface "
"zope.interface.tests.test_exceptions.IDummy:\n"
" The contract of 'aMethod' is violated because I said so\n"
" Regular exception"
)
def test__repr__(self):
from zope.interface.exceptions import BrokenMethodImplementation
excs = [
BrokenMethodImplementation('aMethod', 'I said so'),
# Use multiple arguments to normalize repr; versions of Python
# prior to 3.7 add a trailing comma if there's just one.
Exception("Regular", "exception")
]
dni = self._makeOne(excs)
self.assertEqual(
repr(dni),
"MultipleInvalid(<InterfaceClass zope.interface.tests.test_exceptions.IDummy>,"
" 'target',"
" (BrokenMethodImplementation('aMethod', 'I said so'),"
" Exception('Regular', 'exception')))"
)
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