
PASS header with invalid MIME type is not changed 
PASS header with invalid MIME type (empty string) is not changed 
PASS known charset but bogus header - missing MIME type 
PASS bogus charset and bogus header - missing MIME type 
PASS If charset= param is UTF-8 (case-insensitive), it should not be changed 
PASS If no charset= param is given, implementation should not add one - unknown MIME 
PASS If no charset= param is given, implementation should not add one - known MIME 
PASS If no charset= param is given, implementation should not add one - known MIME, unknown param, two spaces 
PASS charset given but wrong, fix it (unknown MIME, bogus charset) 
PASS If charset= param is UTF-8 (case-insensitive), it should not be changed (bogus charset) 
PASS charset given but wrong, fix it (known MIME, actual charset) 
PASS Multiple non-UTF-8 charset parameters deduplicate, bogus parameter dropped 
PASS No content type set, give MIME and charset 
PASS charset with leading space that is UTF-8 does change 
PASS charset with trailing space that is UTF-8 does not change 
PASS charset in double quotes that is UTF-8 does not change 
PASS charset in double quotes with space 
PASS charset in double quotes with backslashes that is UTF-8 does not change 
PASS unknown parameters need to be preserved