def test_search():
    skip_list = SkipList()

    skip_list.insert("Key2", 20)
    assert skip_list.find("Key2") == 20

    skip_list.insert("Some Key", 10)
    skip_list.insert("Key2", 8)
    skip_list.insert("V", 13)

    assert skip_list.find("Y") is None
    assert skip_list.find("Key2") == 8
    assert skip_list.find("Some Key") == 10
    assert skip_list.find("V") == 13