This is a testharness.js-based test.
PASS ASCII superset encoding: ibm866 
PASS ASCII superset encoding: iso-8859-2 
PASS ASCII superset encoding: iso-8859-3 
PASS ASCII superset encoding: iso-8859-4 
PASS ASCII superset encoding: iso-8859-5 
PASS ASCII superset encoding: iso-8859-6 
PASS ASCII superset encoding: iso-8859-7 
PASS ASCII superset encoding: iso-8859-8 
PASS ASCII superset encoding: iso-8859-8-i 
PASS ASCII superset encoding: iso-8859-10 
PASS ASCII superset encoding: iso-8859-13 
PASS ASCII superset encoding: iso-8859-14 
PASS ASCII superset encoding: iso-8859-15 
PASS ASCII superset encoding: iso-8859-16 
PASS ASCII superset encoding: koi8-r 
PASS ASCII superset encoding: koi8-u 
PASS ASCII superset encoding: macintosh 
PASS ASCII superset encoding: windows-874 
PASS ASCII superset encoding: windows-1250 
PASS ASCII superset encoding: windows-1251 
PASS ASCII superset encoding: windows-1252 
PASS ASCII superset encoding: windows-1253 
PASS ASCII superset encoding: windows-1254 
PASS ASCII superset encoding: windows-1255 
PASS ASCII superset encoding: windows-1256 
PASS ASCII superset encoding: windows-1257 
PASS ASCII superset encoding: windows-1258 
PASS ASCII superset encoding: x-mac-cyrillic 
PASS ASCII superset encoding: gbk 
PASS ASCII superset encoding: gb18030 
PASS ASCII superset encoding: big5 
PASS ASCII superset encoding: euc-jp 
FAIL ASCII superset encoding: iso-2022-jp assert_equals: expected "\0\x01\x02\x03\x04\x05\x06\x07\b\t\n\v\f\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1c\x1d\x1e\x1f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~" but got "\0\x01\x02\x03\x04\x05\x06\x07\b\t\n\v\f\r��\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1c\x1d\x1e\x1f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
PASS ASCII superset encoding: shift_jis 
PASS ASCII superset encoding: euc-kr 
PASS ASCII superset encoding: x-user-defined 
Harness: the test ran to completion.