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from rpython.rlib.rshrinklist import AbstractShrinkList
class Item:
alive = True
class ItemList(AbstractShrinkList):
def must_keep(self, x):
return x.alive
def test_simple():
l = ItemList()
l2 = [Item() for i in range(150)]
for x in l2:
l.append(x)
assert l.items() == l2
#
for x in l2[::2]:
x.alive = False
l3 = [Item() for i in range(150 + 16)]
for x in l3:
l.append(x)
assert l.items() == l2[1::2] + l3 # keeps the order
def test_append_dead_items():
l = ItemList()
for i in range(150):
x = Item()
l.append(x)
x.alive = False
assert len(l.items()) <= 16
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