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33 changes: 33 additions & 0 deletions Lib/test/test_weakset.py
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import unittest
from weakref import WeakSet
import copy
import string
from collections import UserString as ustr
from collections.abc import Set, MutableSet
Expand All @@ -15,6 +16,12 @@ class RefCycle:
def __init__(self):
self.cycle = self

class WeakSetSubclass(WeakSet):
pass

class WeakSetWithSlots(WeakSet):
__slots__ = ('x', 'y')


class TestWeakSet(unittest.TestCase):

Expand Down Expand Up @@ -455,6 +462,32 @@ def test_abc(self):
self.assertIsInstance(self.s, Set)
self.assertIsInstance(self.s, MutableSet)

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_copying(self):
for cls in WeakSet, WeakSetWithSlots:
s = cls(self.items)
s.x = ['x']
s.z = ['z']

dup = copy.copy(s)
self.assertIsInstance(dup, cls)
self.assertEqual(dup, s)
self.assertIsNot(dup, s)
self.assertIs(dup.x, s.x)
self.assertIs(dup.z, s.z)
self.assertFalse(hasattr(dup, 'y'))

dup = copy.deepcopy(s)
self.assertIsInstance(dup, cls)
self.assertEqual(dup, s)
self.assertIsNot(dup, s)
self.assertEqual(dup.x, s.x)
self.assertIsNot(dup.x, s.x)
self.assertEqual(dup.z, s.z)
self.assertIsNot(dup.z, s.z)
self.assertFalse(hasattr(dup, 'y'))


if __name__ == "__main__":
unittest.main()