textdecoder-ignorebom.any.js (2402B)
1 // META: global=window,dedicatedworker,shadowrealm 2 // META: title=Encoding API: TextDecoder ignoreBOM option 3 4 var cases = [ 5 {encoding: 'utf-8', bytes: [0xEF, 0xBB, 0xBF, 0x61, 0x62, 0x63]}, 6 {encoding: 'utf-16le', bytes: [0xFF, 0xFE, 0x61, 0x00, 0x62, 0x00, 0x63, 0x00]}, 7 {encoding: 'utf-16be', bytes: [0xFE, 0xFF, 0x00, 0x61, 0x00, 0x62, 0x00, 0x63]} 8 ]; 9 10 cases.forEach(function(testCase) { 11 test(function() { 12 var BOM = '\uFEFF'; 13 var decoder = new TextDecoder(testCase.encoding, {ignoreBOM: true}); 14 var bytes = new Uint8Array(testCase.bytes); 15 assert_equals( 16 decoder.decode(bytes), 17 BOM + 'abc', 18 testCase.encoding + ': BOM should be present in decoded string if ignored'); 19 assert_equals( 20 decoder.decode(bytes), 21 BOM + 'abc', 22 testCase.encoding + ': BOM should be present in decoded string if ignored by a reused decoder'); 23 24 decoder = new TextDecoder(testCase.encoding, {ignoreBOM: false}); 25 assert_equals( 26 decoder.decode(bytes), 27 'abc', 28 testCase.encoding + ': BOM should be absent from decoded string if not ignored'); 29 assert_equals( 30 decoder.decode(bytes), 31 'abc', 32 testCase.encoding + ': BOM should be absent from decoded string if not ignored by a reused decoder'); 33 34 decoder = new TextDecoder(testCase.encoding); 35 assert_equals( 36 decoder.decode(bytes), 37 'abc', 38 testCase.encoding + ': BOM should be absent from decoded string by default'); 39 assert_equals( 40 decoder.decode(bytes), 41 'abc', 42 testCase.encoding + ': BOM should be absent from decoded string by default with a reused decoder'); 43 }, 'BOM is ignored if ignoreBOM option is specified: ' + testCase.encoding); 44 }); 45 46 test(function() { 47 assert_true('ignoreBOM' in new TextDecoder(), 'The ignoreBOM attribute should exist on TextDecoder.'); 48 assert_equals(typeof new TextDecoder().ignoreBOM, 'boolean', 'The type of the ignoreBOM attribute should be boolean.'); 49 assert_false(new TextDecoder().ignoreBOM, 'The ignoreBOM attribute should default to false.'); 50 assert_true(new TextDecoder('utf-8', {ignoreBOM: true}).ignoreBOM, 'The ignoreBOM attribute can be set using an option.'); 51 52 }, 'The ignoreBOM attribute of TextDecoder');