<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Events in stopped file readers</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
  </head>
  <body>
    <script>
function with_iframe(url) {
    return new Promise(function(resolve) {
        var frame = document.createElement('iframe');
        frame.className = 'test-iframe';
        frame.src = url;
        frame.onload = function() { resolve(frame); };
        document.body.appendChild(frame);
    });
}

promise_test(async t => {
    const frame = await with_iframe("/");
    const reader = new frame.contentWindow.FileReader();

    reader.readAsText(new Blob(["123"], {type: "text/plain-specific"}));
    await new Promise(resolve => setTimeout(resolve, 0));

    frame.remove();

    reader.onload = () => assert_unreached("load");
    reader.onerror = () => assert_unreached("error");
    try {
        reader.readAsText(new Blob(["123"], {type: "text/plain-specific"}));
    } catch (e) {
    }
    await new Promise(resolve => setTimeout(resolve, 100));
}, "Make sure events are not fired for stopped readers");
    </script>
  </body>
</html>