Binary number with alternating bits

#[test]
fn t1() {
    // 5 = 101 => true
    let s = std::time::Instant::now();
    let v = Solution::has_alternating_bits(5);
    log_result!(v == true, "t1", s, true, v);
    assert!(v);
}

#[test]
fn t2() {
    // 7 = 111 => false
    let s = std::time::Instant::now();
    let v = Solution::has_alternating_bits(7);
    log_result!(v == false, "t2", s, false, v);
    assert!(!v);
}

#[test]
fn t3() {
    // 11 = 1011 => false
    let s = std::time::Instant::now();
    let v = Solution::has_alternating_bits(11);
    log_result!(v == false, "t3", s, false, v);
    assert!(!v);
}

#[test]
fn t4() {
    // 10 = 1010 => true
    let s = std::time::Instant::now();
    let v = Solution::has_alternating_bits(10);
    log_result!(v == true, "t4", s, true, v);
    assert!(v);
}

#[test]
fn t5() {
    // 1 => true
    let s = std::time::Instant::now();
    let v = Solution::has_alternating_bits(1);
    log_result!(v == true, "t5", s, true, v);
    assert!(v);
}