def remove(self):
s = OrderedSet()
with Assert.raises(KeyError):
s.remove(1)
s.add(1)
s.remove(1)
def discard(self):
s = OrderedSet()
s.discard(1)
s.add(1)
s.discard(1)
Assert(1).not_in(s)
def add(self):
s = OrderedSet()
s.add(1)
Assert(1).in_(s)
