def time(store):
tm = TreeMap()
for i in store:
tm.put(i, i)
start = time_ns()
for i in store:
tm.remove(i)
end = time_ns()
return end - start
def test():
m1 = TreeMap(none_at_end)
assert m1.put('a', 'a') is None
assert m1.put('b', 'b') is None
assert m1.put('c', 'c') is None
assert m1.put(None, 'd') is None
m2 = TreeMap(none_at_end)
m2.put_all(m1)
assert m1.last_key() is None
assert m1.get(m1.last_key()) == 'd'
assert m1.remove(m1.last_key()) == 'd'
assert m1.last_key() == 'c'
assert m2.entry_set().to_string() == '[a=a, b=b, c=c, None=d]'
m3 = m2.tail_map('b')
assert m3.last_key() is None
assert m3.get(m3.last_key()) == 'd'
assert m3.remove(m3.last_key()) == 'd'
assert m3.last_key() == 'c'