let s_as_utf16 = s.encode_utf16().collect::<Vec<u16>>();
let u_as_string = String::from_utf16(&u).unwrap();
- assert!(::rustc_unicode::str::is_utf16(&u));
+ assert!(::std_unicode::str::is_utf16(&u));
assert_eq!(s_as_utf16, u);
assert_eq!(u_as_string, s);