def test_sorted_set_rem(sorted_set):
    sorted_set.zadd('test1', 100, 'test2', 200)
    assert sorted_set.zcard() == 2
    sorted_set.zremrangebyscore(0, 300)
    assert sorted_set.zcard() == 0
def test_sorted_set_add(sorted_set):
    sorted_set.zadd('test1', 100, 'test2', 200)
    assert 2 == sorted_set.zcard()