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<!DOCTYPE html>
<title>Encoding API: UTF-16 surrogate handling</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
var bad = [
{
encoding: 'utf-16le',
input: [0x00, 0xd8],
expected: '\uFFFD',
name: 'lone surrogate lead'
},
{
encoding: 'utf-16le',
input: [0x00, 0xdc],
expected: '\uFFFD',
name: 'lone surrogate trail'
},
{
encoding: 'utf-16le',
input: [0x00, 0xd8, 0x00, 0x00],
expected: '\uFFFD\u0000',
name: 'unmatched surrogate lead'
},
{
encoding: 'utf-16le',
input: [0x00, 0xdc, 0x00, 0x00],
expected: '\uFFFD\u0000',
name: 'unmatched surrogate trail'
},
{
encoding: 'utf-16le',
input: [0x00, 0xdc, 0x00, 0xd8],
expected: '\uFFFD\uFFFD',
name: 'swapped surrogate pair'
}
];
bad.forEach(function(t) {
test(function() {
assert_equals(new TextDecoder(t.encoding).decode(new Uint8Array(t.input)), t.expected);
}, t.encoding + ' - ' + t.name);
test(function() {
assert_throws(new TypeError(), function() {
new TextDecoder(t.encoding, {fatal: true}).decode(new Uint8Array(t.input))
});
}, t.encoding + ' - ' + t.name + ' (fatal flag set)');
});
</script>
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