Guess the number using bitwise questions i

#[test]
fn test_example1() {
    let start = std::time::Instant::now();
    let val = run_test(31);
    let expected = 31;
    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 = run_test(33);
    let expected = 33;
    log_result!(val == expected, "test_example2", start, expected, val);
    assert_eq!(val, expected);
}

#[test]
fn test_large() {
    let start = std::time::Instant::now();
    let val = run_test((1 << 30) - 1);
    let expected = (1 << 30) - 1;
    log_result!(val == expected, "test_large", start, expected, val);
    assert_eq!(val, expected);
}

#[test]
fn test_one() {
    let start = std::time::Instant::now();
    let val = run_test(1);
    let expected = 1;
    log_result!(val == expected, "test_one", start, expected, val);
    assert_eq!(val, expected);
}

#[test]
fn test_power_of_two() {
    let start = std::time::Instant::now();
    let val = run_test(1024);
    let expected = 1024;
    log_result!(val == expected, "test_power_of_two", start, expected, val);
    assert_eq!(val, expected);
}