third_party/web_platform_tests/XMLHttpRequest/send-data-unexpected-tostring.htm

<!doctype html>
<meta charset=utf-8>
<title>XMLHttpRequest: passing objects that interfere with the XHR instance to send()</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following::ol/li[4]" />
<link rel="help" href="https://heycam.github.io/webidl/#es-union" data-tested-assertations="following::ol/li[16]" />


<div id="log"></div>

<script>
  var test1 = async_test('abort() called from data stringification')
  test1.step(function() {
    var client = new XMLHttpRequest()
    var objAbortsOnStringification = {toString:function(){
      client.abort();
    }}
    client.open('POST', 'resources/content.py')
    assert_throws("InvalidStateError", function(){
      client.send(objAbortsOnStringification)
    })
    test1.done()
  });

  var test2 = async_test('open() called from data stringification')
  test2.step(function() {
    var client = new XMLHttpRequest()
    var objOpensOnStringification = {toString:function(){
      client.open('POST', 'resources/status.py?text=second_open_wins');
    }}
    client.onloadend = test2.step_func(function(){
      assert_equals(client.statusText, 'second_open_wins')
      test2.done()
    })
    client.open('POST', 'resources/status.py?text=first_open_wins')
    client.send(objOpensOnStringification)
  });

  var test3 = async_test('send() called from data stringification')
  test3.step(function() {
    var client = new XMLHttpRequest()
    var objSendsOnStringification = {toString:function(){
      client.send('bomb!');
    }}
    client.onload = test3.step_func(function(){
      assert_equals(client.responseText, 'bomb!')
      test3.done()
    })
    client.open('POST', 'resources/content.py')
    assert_throws('InvalidStateError', function(){
      client.send(objSendsOnStringification)
    })
  });


</script>