def test_copy(self):
oset1 = OrderedSet(self.lst)
oset2 = oset1.copy()
self.assertIsNot(oset1, oset2)
self.assertEqual(oset1, oset2)
oset1.clear()
self.assertNotEqual(oset1, oset2)
def test_clear(self):
val = frozenset([1])
oset = OrderedSet()
ws = weakref.WeakKeyDictionary()
oset.add(val)
ws[val] = 1
oset.clear()
self.assertEqual(list(oset), [])
del val
gc.collect()
self.assertEqual(list(ws), [])