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from __future__ import unicode_literals
import warnings
from django.test import SimpleTestCase
from django.test.utils import reset_warning_registry
from django.utils import six
from django.utils.deprecation import (
DeprecationInstanceCheck, RemovedInNextVersionWarning, RenameMethodsBase,
)
class RenameManagerMethods(RenameMethodsBase):
renamed_methods = (
('old', 'new', DeprecationWarning),
)
class RenameMethodsTests(SimpleTestCase):
"""
Tests the `RenameMethodsBase` type introduced to rename `get_query_set`
to `get_queryset` across the code base following #15363.
"""
def test_class_definition_warnings(self):
"""
Ensure a warning is raised upon class definition to suggest renaming
the faulty method.
"""
reset_warning_registry()
with warnings.catch_warnings(record=True) as recorded:
warnings.simplefilter('always')
class Manager(six.with_metaclass(RenameManagerMethods)):
def old(self):
pass
self.assertEqual(len(recorded), 1)
msg = str(recorded[0].message)
self.assertEqual(msg,
'`Manager.old` method should be renamed `new`.')
def test_get_new_defined(self):
"""
Ensure `old` complains and not `new` when only `new` is defined.
"""
with warnings.catch_warnings(record=True) as recorded:
warnings.simplefilter('ignore')
class Manager(six.with_metaclass(RenameManagerMethods)):
def new(self):
pass
warnings.simplefilter('always')
manager = Manager()
manager.new()
self.assertEqual(len(recorded), 0)
manager.old()
self.assertEqual(len(recorded), 1)
msg = str(recorded.pop().message)
self.assertEqual(msg,
'`Manager.old` is deprecated, use `new` instead.')
def test_get_old_defined(self):
"""
Ensure `old` complains when only `old` is defined.
"""
with warnings.catch_warnings(record=True) as recorded:
warnings.simplefilter('ignore')
class Manager(six.with_metaclass(RenameManagerMethods)):
def old(self):
pass
warnings.simplefilter('always')
manager = Manager()
manager.new()
self.assertEqual(len(recorded), 0)
manager.old()
self.assertEqual(len(recorded), 1)
msg = str(recorded.pop().message)
self.assertEqual(msg,
'`Manager.old` is deprecated, use `new` instead.')
def test_deprecated_subclass_renamed(self):
"""
Ensure the correct warnings are raised when a class that didn't rename
`old` subclass one that did.
"""
with warnings.catch_warnings(record=True) as recorded:
warnings.simplefilter('ignore')
class Renamed(six.with_metaclass(RenameManagerMethods)):
def new(self):
pass
class Deprecated(Renamed):
def old(self):
super(Deprecated, self).old()
warnings.simplefilter('always')
deprecated = Deprecated()
deprecated.new()
self.assertEqual(len(recorded), 1)
msg = str(recorded.pop().message)
self.assertEqual(msg,
'`Renamed.old` is deprecated, use `new` instead.')
recorded[:] = []
deprecated.old()
self.assertEqual(len(recorded), 2)
msgs = [str(warning.message) for warning in recorded]
self.assertEqual(msgs, [
'`Deprecated.old` is deprecated, use `new` instead.',
'`Renamed.old` is deprecated, use `new` instead.',
])
def test_renamed_subclass_deprecated(self):
"""
Ensure the correct warnings are raised when a class that renamed
`old` subclass one that didn't.
"""
with warnings.catch_warnings(record=True) as recorded:
warnings.simplefilter('ignore')
class Deprecated(six.with_metaclass(RenameManagerMethods)):
def old(self):
pass
class Renamed(Deprecated):
def new(self):
super(Renamed, self).new()
warnings.simplefilter('always')
renamed = Renamed()
renamed.new()
self.assertEqual(len(recorded), 0)
renamed.old()
self.assertEqual(len(recorded), 1)
msg = str(recorded.pop().message)
self.assertEqual(msg,
'`Renamed.old` is deprecated, use `new` instead.')
def test_deprecated_subclass_renamed_and_mixins(self):
"""
Ensure the correct warnings are raised when a subclass inherit from a
class that renamed `old` and mixins that may or may not have renamed
`new`.
"""
with warnings.catch_warnings(record=True) as recorded:
warnings.simplefilter('ignore')
class Renamed(six.with_metaclass(RenameManagerMethods)):
def new(self):
pass
class RenamedMixin(object):
def new(self):
super(RenamedMixin, self).new()
class DeprecatedMixin(object):
def old(self):
super(DeprecatedMixin, self).old()
class Deprecated(DeprecatedMixin, RenamedMixin, Renamed):
pass
warnings.simplefilter('always')
deprecated = Deprecated()
deprecated.new()
self.assertEqual(len(recorded), 1)
msg = str(recorded.pop().message)
self.assertEqual(msg,
'`RenamedMixin.old` is deprecated, use `new` instead.')
deprecated.old()
self.assertEqual(len(recorded), 2)
msgs = [str(warning.message) for warning in recorded]
self.assertEqual(msgs, [
'`DeprecatedMixin.old` is deprecated, use `new` instead.',
'`RenamedMixin.old` is deprecated, use `new` instead.',
])
class DeprecationInstanceCheckTest(SimpleTestCase):
def test_warning(self):
class Manager(six.with_metaclass(DeprecationInstanceCheck)):
alternative = 'fake.path.Foo'
deprecation_warning = RemovedInNextVersionWarning
msg = '`Manager` is deprecated, use `fake.path.Foo` instead.'
with warnings.catch_warnings():
warnings.simplefilter('error', category=RemovedInNextVersionWarning)
with self.assertRaisesMessage(RemovedInNextVersionWarning, msg):
isinstance(object, Manager)
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