third_party/web_platform_tests/XMLHttpRequest/open-during-abort.htm

<!doctype html>
<html>
  <head>
    <title>XMLHttpRequest: open() during abort()</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
  </head>
  <body>
    <div id="log"></div>
    <script>
      test(function() {
        var client = new XMLHttpRequest(),
            abort_flag = false,
            result = [],
            expected = [1, 4, 1] // open() => 1, abort() => 4, open() => 1

        client.onreadystatechange = this.step_func(function() {
          result.push(client.readyState)
          if (abort_flag) {
            abort_flag = false
            client.open("GET", "...")
          }
        })
        client.open("GET", "resources/well-formed.xml")
        client.send(null)
        abort_flag = true
        client.abort()
        assert_array_equals(result, expected)
      })
    </script>
  </body>
</html>