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from kombu.utils.objects import cached_property
class test_cached_property:
def test_deleting(self):
class X:
xx = False
@cached_property
def foo(self):
return 42
@foo.deleter # noqa
def foo(self, value):
self.xx = value
x = X()
del(x.foo)
assert not x.xx
x.__dict__['foo'] = 'here'
del(x.foo)
assert x.xx == 'here'
def test_when_access_from_class(self):
class X:
xx = None
@cached_property
def foo(self):
return 42
@foo.setter # noqa
def foo(self, value):
self.xx = 10
desc = X.__dict__['foo']
assert X.foo is desc
assert desc.__get__(None) is desc
assert desc.__set__(None, 1) is desc
assert desc.__delete__(None) is desc
assert desc.setter(1)
x = X()
x.foo = 30
assert x.xx == 10
del(x.foo)
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