Check if a string is an acronym of words

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::is_acronym(sv(&["alice","bob","charlie"]), "abc".into());
    let expected = true;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::is_acronym(sv(&["an","apple"]), "a".into());
    let expected = false;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let val = Solution::is_acronym(sv(&["never","gonna","give","up","on","you"]), "ngguoy".into());
    let expected = true;
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    let val = Solution::is_acronym(sv(&["hello"]), "h".into());
    let expected = true;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let val = Solution::is_acronym(sv(&["a","b"]), "ab".into());
    let expected = true;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}