flush-characters-in-document-write.html

<head>
<script>
if (window.testRunner) {
  testRunner.dumpAsText();
  testRunner.waitUntilDone();
}

function test() {
  document.write("Should say SUCCESS:<p>SUCCESS");

  setTimeout("testRunner.notifyDone()", 1);
}
</script>
</head>
<body onload="test()">
</body>

chromium/third_party/blink/web_tests/fast/tokenizer/flush-characters-in-document-write.html