Click on the link. The page it takes you to will indicate whether the test passes or fails.
A page with no encoding declarations, but with a UTF-16 little-endian BOM will be recognized as UTF-16.
No encoding information is declared in the HTTP header or inside the document. The text contains the following sequence of bytes: 0xC3 0xc0 0x53 0xc1 0xC3 0xc0 0xAC 0xc20 0xC3 0xc0 0x61 0xc1. The stylesheet contains the same characters but in a UTF-8 encoding.