chromium/third_party/blink/web_tests/external/wpt/websockets/interfaces/WebSocket/close/close-nested.html

<!doctype html>
<title>WebSockets: close() in close event handler</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=../../../constants.sub.js></script>
<meta name="variant" content="?default">
<meta name="variant" content="?wss">
<div id=log></div>
<script>
async_test(function(t) {
  var ws = new WebSocket(SCHEME_DOMAIN_PORT+'/');
  var i = 0;
  ws.onclose = t.step_func(function(e) {
    i++;
    if (i == 1) {
      assert_equals(ws.readyState, ws.CLOSED);
      ws.close();
      assert_equals(ws.readyState, ws.CLOSED);
    }
    t.step_timeout(function() {
      assert_equals(i, 1);
      t.done();
    }, 50);
  });
  ws.close();
  assert_equals(ws.readyState, ws.CLOSING);
});
</script>