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from graphql.pyutils import cached_property
def describe_cached_property():
def works_like_a_normal_property():
class TestClass:
@cached_property
def value(self):
return 42
assert TestClass().value == 42
def caches_the_value():
class TestClass:
evaluations = 0
@cached_property
def value(self):
self.__class__.evaluations += 1
return 42
obj = TestClass()
assert TestClass.evaluations == 0
assert obj.value == 42
assert TestClass.evaluations == 1
assert obj.value == 42
assert TestClass.evaluations == 1
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