Find the peaks

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::find_peaks(vec![2, 4, 4]);
    let expected = (vec![] as Vec<i32>);
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::find_peaks(vec![1, 4, 3, 8, 5]);
    let expected = vec![1, 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::find_peaks(vec![1, 2, 1, 2, 1]);
    let expected = vec![1, 3];
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    let val = Solution::find_peaks(vec![1, 2, 3, 4, 5]);
    let expected = (vec![] as Vec<i32>);
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let val = Solution::find_peaks(vec![1, 3, 1]);
    let expected = vec![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::find_peaks(vec![1, 3, 3, 1]);
    let expected = (vec![] as Vec<i32>);
    log_result!(val == expected, "t6", start, &expected, &val);
    assert_eq!(val, expected);
}