#[test]
pub fn test_strlen() {
    let mut buffer: Vec<u8> = "a".repeat(1000).into();
    buffer.push(0);
    assert_eq!(unsafe { xrt::strlen(buffer.as_ptr()) }, 1000);
    assert_eq!(unsafe { xrt::strlen((&buffer[1..]).as_ptr()) }, 999);
    assert_eq!(unsafe { xrt::strlen((&buffer[8..]).as_ptr()) }, 992);
}