Maximum sum score of array

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

#[test]
fn test_example1() {
    let start = std::time::Instant::now();
    let val = Solution::maximum_sum_score(vec![4, 3, -2, 5]);
    let expected = 10;
    log_result!(val == expected, "test_example1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_example2() {
    let start = std::time::Instant::now();
    let val = Solution::maximum_sum_score(vec![-3, -5]);
    let expected = -3;
    log_result!(val == expected, "test_example2", start, &expected, &val);
    assert_eq!(val, expected);
}

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

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