@Test
void shouldNotParse_whenNotAtLeast2Token() {

    
    assertEquals(Optional.empty(), Bookmark.parse(null));
    assertEquals(Optional.empty(), Bookmark.parse(""));
    assertEquals(Optional.empty(), Bookmark.parse("a"));
    assertEquals(Optional.empty(), Bookmark.parse("a:"));
    assertEquals(Optional.empty(), Bookmark.parse(":"));
    assertEquals(Optional.empty(), Bookmark.parse(":b"));
    
}