chromium/third_party/blink/web_tests/http/tests/security/aboutBlank/security-context-window-open.https.html

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

document.cookie = 'cookie=parent; SameSite=None; Secure';

function log(msg) {
  var line = document.createElement('div');
  line.appendChild(document.createTextNode(msg));
  document.getElementById('console').appendChild(line);
}

function doTest() {
  var wnd0 = window.open('about:blank');
  var wnd1 = window.open('');

  log('--- Test begins ---\n');
  log('* "about:blank"\n');
  log('document.URL = ' + wnd0.document.URL + '\n');
  log('document.baseURI = ' + wnd0.document.baseURI + '\n');
  log('document.cookie = ' + wnd0.document.cookie + '\n');
  log('* ""\n');
  log('document.URL = ' + wnd1.document.URL + '\n');
  log('document.baseURI = ' + wnd1.document.baseURI + '\n');
  log('document.cookie = ' + wnd1.document.cookie + '\n');
  log('--- After document.open() ---\n');
  wnd0.document.open();
  wnd1.document.open();
  log('* "about:blank"\n');
  log('document.URL = ' + wnd0.document.URL + '\n');
  log('document.baseURI = ' + wnd0.document.baseURI + '\n');
  log('document.cookie = ' + wnd0.document.cookie + '\n');
  log('* ""\n');
  log('document.URL = ' + wnd1.document.URL + '\n');
  log('document.baseURI = ' + wnd1.document.baseURI + '\n');
  log('document.cookie = ' + wnd1.document.cookie + '\n');
  log('--- After document.close() ---\n');
  wnd0.document.close();
  wnd1.document.close();
  log('* "about:blank"\n');
  log('document.URL = ' + wnd0.document.URL + '\n');
  log('document.baseURI = ' + wnd0.document.baseURI + '\n');
  log('document.cookie = ' + wnd0.document.cookie + '\n');
  log('* ""\n');
  log('document.URL = ' + wnd1.document.URL + '\n');
  log('document.baseURI = ' + wnd1.document.baseURI + '\n');
  log('document.cookie = ' + wnd1.document.cookie + '\n');
  log('--- Test ends ---\n');

  testRunner.notifyDone();
}
</script>
</head>
<body onload="doTest()">
<div id="console"></div>
</body>
</html>