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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');
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');
decoder = new TextDecoder(testCase.encoding);
assert_equals(
decoder.decode(bytes),
'abc',
testCase.encoding + ': BOM should be absent from decoded string by default');
}, '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');