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import py
from pypy.interpreter.gateway import interp2app
class AppTestIdentityDict(object):
def setup_class(cls):
if cls.runappdirect:
py.test.skip("interp2app doesn't work on appdirect")
def w_uses_identity_strategy(self, obj):
import __pypy__
return "IdentityDictStrategy" in __pypy__.internal_repr(obj)
def test_use_strategy(self):
class X(object):
pass
d = {}
x = X()
d[x] = 1
assert self.uses_identity_strategy(d)
assert d[x] == 1
def test_bad_item(self):
class X(object):
pass
class Y(object):
def __hash__(self):
return 32
d = {}
x = X()
y = Y()
d[x] = 1
assert self.uses_identity_strategy(d)
d[y] = 2
assert not self.uses_identity_strategy(d)
assert d[x] == 1
assert d[y] == 2
def test_bad_key(self):
class X(object):
pass
d = {}
x = X()
class Y(object):
def __hash__(self):
return hash(x) # to make sure we do x == y
def __eq__(self, other):
return True
y = Y()
d[x] = 1
assert self.uses_identity_strategy(d)
assert d[y] == 1
assert not self.uses_identity_strategy(d)
def test_iter(self):
class X(object):
pass
x = X()
d = {x: 1}
assert self.uses_identity_strategy(d)
assert list(iter(d)) == [x]
def test_mutate_class_and_then_compare(self):
class X(object):
pass
class Y(object):
pass
x = X()
y = Y()
d1 = {x: 1}
d2 = {y: 1}
assert self.uses_identity_strategy(d1)
assert self.uses_identity_strategy(d2)
#
X.__hash__ = lambda self: hash(y)
X.__eq__ = lambda self, other: True
#
assert d1 == d2
assert self.uses_identity_strategy(d1)
assert not self.uses_identity_strategy(d2)
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