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// META: title=Encoding API: TextDecoder ignoreBOM option var cases = [ {encoding: 'utf-8', bytes: [0xEF, 0xBB, 0xBF, 0x61, 0x62, 0x63]}, {encoding: 'utf-16le', bytes: [0xFF, 0xFE, 0x61, 0x00, 0x62, 0x00, 0x63, 0x00]}, {encoding: 'utf-16be', bytes: [0xFE, 0xFF, 0x00, 0x61, 0x00, 0x62, 0x00, 0x63]} ]; cases.forEach(function(testCase) { test(function() { var BOM = '\uFEFF'; var decoder = new TextDecoder(testCase.encoding, {ignoreBOM: true}); var bytes = new Uint8Array(testCase.bytes); assert_equals( decoder.decode(bytes), BOM + 'abc', testCase.encoding + ': BOM should be present in decoded string if ignored'); assert_equals( decoder.decode(bytes), BOM + 'abc', testCase.encoding + ': BOM should be present in decoded string if ignored by a reused decoder'); decoder = new TextDecoder(testCase.encoding, {ignoreBOM: false}); assert_equals( decoder.decode(bytes), 'abc', testCase.encoding + ': BOM should be absent from decoded string if not ignored'); assert_equals( decoder.decode(bytes), 'abc', testCase.encoding + ': BOM should be absent from decoded string if not ignored by a reused decoder'); decoder = new TextDecoder(testCase.encoding); assert_equals( decoder.decode(bytes), 'abc', testCase.encoding + ': BOM should be absent from decoded string by default'); assert_equals( decoder.decode(bytes), 'abc', testCase.encoding + ': BOM should be absent from decoded string by default with a reused decoder'); }, 'BOM is ignored if ignoreBOM option is specified: ' + testCase.encoding); }); test(function() { assert_true('ignoreBOM' in new TextDecoder(), 'The ignoreBOM attribute should exist on TextDecoder.'); assert_equals(typeof new TextDecoder().ignoreBOM, 'boolean', 'The type of the ignoreBOM attribute should be boolean.'); assert_false(new TextDecoder().ignoreBOM, 'The ignoreBOM attribute should default to false.'); assert_true(new TextDecoder('utf-8', {ignoreBOM: true}).ignoreBOM, 'The ignoreBOM attribute can be set using an option.'); }, 'The ignoreBOM attribute of TextDecoder');