use unic_langid_impl::canonicalize; fn assert_canonicalize(input: &str, output: &str) { assert_eq!(&canonicalize(input).unwrap(), output); } #[test] fn test_canonicalize() { assert_canonicalize("Pl", "pl"); assert_canonicalize("eN-uS", "en-US"); assert_canonicalize("ZH_hans_hK", "zh-Hans-HK"); assert_canonicalize("en-scouse-fonipa", "en-fonipa-scouse"); }