src/third_party/web_platform_tests/encoding/textdecoder-streaming.html - cobalt - Git at Google

 <!DOCTYPE html>
 <title>Encoding API: Streaming decode</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="resources/encodings.js"></script>
 <script>

 var string = '\\x00123ABCabc\\x80\\xFF\\u0100\\u1000\\uFFFD\\uD800\\uDC00\\uDBFF\\uDFFF';

 utf_encodings.forEach(function (encoding) {
     for (var len = 1; len <= 5; ++len) {
         test(function() {
             var encoded = new TextEncoder(encoding).encode(string);

             var out = '';
             var decoder = new TextDecoder(encoding);
             for (var i = 0; i < encoded.length; i += len) {
                 var sub = [];
                 for (var j = i; j < encoded.length && j < i + len; ++j)
                     sub.push(encoded[j]);
                 out += decoder.decode(new Uint8Array(sub), {stream: true});
             }
             out += decoder.decode();
             assert_equals(out, string);
         }, 'Streaming decode: ' + encoding + ', ' + len + ' byte window');
     }
 });

 </script>
	<!DOCTYPE html>
	<title>Encoding API: Streaming decode</title>
	<script src="/resources/testharness.js"></script>
	<script src="/resources/testharnessreport.js"></script>
	<script src="resources/encodings.js"></script>
	<script>

	var string = '\\x00123ABCabc\\x80\\xFF\\u0100\\u1000\\uFFFD\\uD800\\uDC00\\uDBFF\\uDFFF';

	utf_encodings.forEach(function (encoding) {
	for (var len = 1; len <= 5; ++len) {
	test(function() {
	var encoded = new TextEncoder(encoding).encode(string);

	var out = '';
	var decoder = new TextDecoder(encoding);
	for (var i = 0; i < encoded.length; i += len) {
	var sub = [];
	for (var j = i; j < encoded.length && j < i + len; ++j)
	sub.push(encoded[j]);
	out += decoder.decode(new Uint8Array(sub), {stream: true});
	}
	out += decoder.decode();
	assert_equals(out, string);
	}, 'Streaming decode: ' + encoding + ', ' + len + ' byte window');
	}
	});

	</script>