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from rpython.rlib.cache import Cache
class MyCache(Cache):
counter = 0
def _build(self, key):
self.counter += 1
return key*7
class TestCache:
def test_getorbuild(self):
cache = MyCache()
assert cache.getorbuild(1) == 7
assert cache.counter == 1
assert cache.getorbuild(1) == 7
assert cache.counter == 1
assert cache.getorbuild(3) == 21
assert cache.counter == 2
assert cache.getorbuild(1) == 7
assert cache.counter == 2
assert cache.getorbuild(3) == 21
assert cache.counter == 2
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