Count the number of consistent strings

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::count_consistent_strings("ab".to_string(), sv(&["ad","bd","aaab","baa","badab"]));
    let expected = 2;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::count_consistent_strings("abc".to_string(), sv(&["a","b","c","ab","ac","bc","abc"]));
    let expected = 7;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let val = Solution::count_consistent_strings("cad".to_string(), sv(&["cc","acd","b","ba","bac","bad","ac","d"]));
    let expected = 4;
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    // All allowed
    let val = Solution::count_consistent_strings("abcdefghijklmnopqrstuvwxyz".to_string(), sv(&["hello","world"]));
    let expected = 2;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    // Nothing allowed
    let val = Solution::count_consistent_strings("a".to_string(), sv(&["b","c","d"]));
    let expected = 0;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}