def test_clear(self):
bt = BTree()
map(bt.add, range(10))
assert bt.has_key(2)
bt.clear()
assert not bt.has_key(2)
assert bt.keys() == []
def test_iter(self):
bt = BTree()
map(bt.add, range(100))
assert list(bt) == list(bt.iterkeys())
assert list(bt.iteritems()) == zip(bt, bt.itervalues())
assert list(bt.iterkeys()) == bt.keys()
assert list(bt.itervalues()) == bt.values()
assert list(bt.iteritems()) == bt.items()
