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import pytest
from yarl._url import cached_property
def test_reify():
class A:
def __init__(self):
self._cache = {}
@cached_property
def prop(self):
return 1
a = A()
assert 1 == a.prop
def test_reify_class():
class A:
def __init__(self):
self._cache = {}
@cached_property
def prop(self):
"""Docstring."""
return 1
assert isinstance(A.prop, cached_property)
assert "Docstring." == A.prop.__doc__
def test_reify_assignment():
class A:
def __init__(self):
self._cache = {}
@cached_property
def prop(self):
return 1
a = A()
with pytest.raises(AttributeError):
a.prop = 123
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