textdecoder-byte-order-marks.any.js (1522B)
1 // META: global=window,dedicatedworker,shadowrealm 2 // META: title=Encoding API: Byte-order marks 3 4 var testCases = [ 5 { 6 encoding: 'utf-8', 7 bom: [0xEF, 0xBB, 0xBF], 8 bytes: [0x7A, 0xC2, 0xA2, 0xE6, 0xB0, 0xB4, 0xF0, 0x9D, 0x84, 0x9E, 0xF4, 0x8F, 0xBF, 0xBD] 9 }, 10 { 11 encoding: 'utf-16le', 12 bom: [0xff, 0xfe], 13 bytes: [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xDB, 0xFD, 0xDF] 14 }, 15 { 16 encoding: 'utf-16be', 17 bom: [0xfe, 0xff], 18 bytes: [0x00, 0x7A, 0x00, 0xA2, 0x6C, 0x34, 0xD8, 0x34, 0xDD, 0x1E, 0xDB, 0xFF, 0xDF, 0xFD] 19 } 20 ]; 21 22 var string = 'z\xA2\u6C34\uD834\uDD1E\uDBFF\uDFFD'; // z, cent, CJK water, G-Clef, Private-use character 23 24 testCases.forEach(function(t) { 25 test(function() { 26 27 var decoder = new TextDecoder(t.encoding); 28 assert_equals(decoder.decode(new Uint8Array(t.bytes)), string, 29 'Sequence without BOM should decode successfully'); 30 31 assert_equals(decoder.decode(new Uint8Array(t.bom.concat(t.bytes))), string, 32 'Sequence with BOM should decode successfully (with no BOM present in output)'); 33 34 testCases.forEach(function(o) { 35 if (o === t) 36 return; 37 38 assert_not_equals(decoder.decode(new Uint8Array(o.bom.concat(t.bytes))), string, 39 'Mismatching BOM should not be ignored - treated as garbage bytes.'); 40 }); 41 42 }, 'Byte-order marks: ' + t.encoding); 43 });