1// META: title=Encoding API: Byte-order marks 2 3var testCases = [ 4 { 5 encoding: 'utf-8', 6 bom: [0xEF, 0xBB, 0xBF], 7 bytes: [0x7A, 0xC2, 0xA2, 0xE6, 0xB0, 0xB4, 0xF0, 0x9D, 0x84, 0x9E, 0xF4, 0x8F, 0xBF, 0xBD] 8 }, 9 { 10 encoding: 'utf-16le', 11 bom: [0xff, 0xfe], 12 bytes: [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xDB, 0xFD, 0xDF] 13 }, 14 { 15 encoding: 'utf-16be', 16 bom: [0xfe, 0xff], 17 bytes: [0x00, 0x7A, 0x00, 0xA2, 0x6C, 0x34, 0xD8, 0x34, 0xDD, 0x1E, 0xDB, 0xFF, 0xDF, 0xFD] 18 } 19]; 20 21var string = 'z\xA2\u6C34\uD834\uDD1E\uDBFF\uDFFD'; // z, cent, CJK water, G-Clef, Private-use character 22 23testCases.forEach(function(t) { 24 test(function() { 25 26 var decoder = new TextDecoder(t.encoding); 27 assert_equals(decoder.decode(new Uint8Array(t.bytes)), string, 28 'Sequence without BOM should decode successfully'); 29 30 assert_equals(decoder.decode(new Uint8Array(t.bom.concat(t.bytes))), string, 31 'Sequence with BOM should decode successfully (with no BOM present in output)'); 32 33 testCases.forEach(function(o) { 34 if (o === t) 35 return; 36 37 assert_not_equals(decoder.decode(new Uint8Array(o.bom.concat(t.bytes))), string, 38 'Mismatching BOM should not be ignored - treated as garbage bytes.'); 39 }); 40 41 }, 'Byte-order marks: ' + t.encoding); 42}); 43