Form smallest number from two digit arrays

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::min_number(vec![4, 1, 3], vec![5, 7]);
    let expected = 15;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::min_number(vec![3, 5, 2, 6], vec![3, 1, 7]);
    let expected = 3;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let val = Solution::min_number(vec![5], vec![5]);
    let expected = 5;
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    let val = Solution::min_number(vec![1, 3], vec![2, 4]);
    let expected = 12;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let val = Solution::min_number(vec![9], vec![1]);
    let expected = 19;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t6() {
    let start = std::time::Instant::now();
    let val = Solution::min_number(vec![2, 3, 4], vec![2, 5, 6]);
    let expected = 2;
    log_result!(val == expected, "t6", start, &expected, &val);
    assert_eq!(val, expected);
}