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from weakref import WeakValueDictionary
import pytest
from snakeoil.weakrefs import WeakValCache
class RefObj:
pass
@pytest.mark.skipif(
WeakValueDictionary is WeakValCache,
reason="WeakValCache is weakref.WeakValueDictionary; indicates "
"snakeoil._caching isn't compiled")
class TestWeakValCache:
def setup_method(self, method):
self.o = RefObj()
self.w = WeakValCache()
def test_setitem(self):
s = "asdf"
self.w[s] = self.o
self.w["fds"] = self.o
self.w[s] = self.o
def test_getitem(self):
s = "asdf"
self.w[s] = self.o
assert self.w[s] is self.o
def test_expiring(self):
s = "asdf"
self.w[s] = self.o
assert self.w[s]
del self.o
with pytest.raises(KeyError):
self.w.__getitem__(s)
def test_get(self):
s = "asdf"
with pytest.raises(KeyError):
self.w.__getitem__(s)
self.w[s] = self.o
assert self.w.get(s) is self.o
def test_keys(self):
assert list(self.w.keys()) == []
self.w['a'] = self.o
self.w['b'] = self.o
self.w['c'] = self.o
assert sorted(self.w.keys()) == ['a', 'b', 'c']
del self.o
assert self.w.keys() == []
def test_values(self):
assert list(self.w.values()) == []
self.w['a'] = self.o
self.w['b'] = self.o
self.w['c'] = self.o
assert len(iter(self.w.values())) == 3
del self.o
assert self.w.values() == []
def test_items(self):
assert list(self.w.items()) == []
self.w['a'] = self.o
self.w['b'] = self.o
self.w['c'] = self.o
assert len(iter(self.w.items())) == 3
del self.o
assert self.w.items() == []
|
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