Score of a string

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::score_of_string("hello".to_string());
    let expected = 13;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::score_of_string("zaz".to_string());
    let expected = 50;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let val = Solution::score_of_string("aa".to_string());
    let expected = 0;
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    let val = Solution::score_of_string("ab".to_string());
    let expected = 1;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let val = Solution::score_of_string("az".to_string());
    let expected = 25;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t6() {
    let start = std::time::Instant::now();
    let val = Solution::score_of_string("abc".to_string());
    let expected = 2;
    log_result!(val == expected, "t6", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t7() {
    let start = std::time::Instant::now();
    let val = Solution::score_of_string("zzz".to_string());
    let expected = 0;
    log_result!(val == expected, "t7", start, &expected, &val);
    assert_eq!(val, expected);
}