Find minimum operations to make all elements divisible by three

#[test]
fn test_all_remainder_1() {
    let start = std::time::Instant::now();
    let val = Solution::minimum_operations(vec![1, 4, 7]);
    let expected = 3;
    log_result!(val == expected, "test_all_remainder_1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_all_remainder_2() {
    let start = std::time::Instant::now();
    let val = Solution::minimum_operations(vec![2, 5, 8]);
    let expected = 3;
    log_result!(val == expected, "test_all_remainder_2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_example1() {
    let start = std::time::Instant::now();
    let val = Solution::minimum_operations(vec![1, 2, 3, 4]);
    let expected = 3;
    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::minimum_operations(vec![3, 6, 9]);
    let expected = 0;
    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::minimum_operations(vec![6, 7, 8]);
    let expected = 2;
    log_result!(val == expected, "test_mixed", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_single_divisible() {
    let start = std::time::Instant::now();
    let val = Solution::minimum_operations(vec![3]);
    let expected = 0;
    log_result!(val == expected, "test_single_divisible", start, &expected, &val);
    assert_eq!(val, expected);
}

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