Find the integer added to array i

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::added_integer(vec![2, 6, 4], vec![9, 7, 5]);
    let expected = 3;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::added_integer(vec![10], vec![5]);
    let expected = -5;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let val = Solution::added_integer(vec![1, 1, 1, 1], vec![1, 1, 1, 1]);
    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::added_integer(vec![0, 5, 10], vec![100, 105, 110]);
    let expected = 100;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let val = Solution::added_integer(vec![5, 3, 1], vec![4, 2, 0]);
    let expected = -1;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t6() {
    let start = std::time::Instant::now();
    let val = Solution::added_integer(vec![7], vec![7]);
    let expected = 0;
    log_result!(val == expected, "t6", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t7() {
    let start = std::time::Instant::now();
    let val = Solution::added_integer(vec![3, 5, 7], vec![6, 8, 10]);
    let expected = 3;
    log_result!(val == expected, "t7", start, &expected, &val);
    assert_eq!(val, expected);
}