image-decode-iframe.html

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset=utf-8>

<meta name="timeout" content="long">

<title>HTMLImageElement.prototype.decode(), iframe tests.</title>

<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">

<link rel="help" href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<iframe id="frame_loaded" srcdoc="iframe"></iframe>

<iframe id="frame_notloaded" srcdoc="iframe"></iframe>

<iframe id="frame_notloaded2" srcdoc="iframe"></iframe>

<script>

"use strict";

promise_test(function() {

  return new Promise(function(resolve, reject) {

    var frame = document.getElementById("frame_loaded");

    var img = frame.contentDocument.createElement("img");

    img.src = "/images/green.png";

    img.onload = function() {

      // At this point the frame which created the img is removed, so decode() should fail.

      frame.parentNode.removeChild(frame);

      img.decode().then(function() {

        assert_unreached("Unexpected success");

      }, function() {

        resolve();

});

};

});

}, document.title + " Decode from removed iframe fails (loaded img)");

promise_test(function(t) {

  var frame = document.getElementById("frame_notloaded");

  var img = frame.contentDocument.createElement("img");

  img.src = "/images/green.png";

  frame.parentNode.removeChild(frame);

  var promise = img.decode();

  return promise_rejects_dom(t, "EncodingError", promise);

}, document.title + " Decode from removed iframe fails (img not loaded)");

promise_test(function(t) {

  var frame = document.getElementById("frame_notloaded2");

  var img = frame.contentDocument.createElement("img");

  img.src = "/images/green.png";

  // First request a promise, then remove the iframe.

  var promise = img.decode();

  frame.parentNode.removeChild(frame);

  return promise_rejects_dom(t, "EncodingError", promise);

}, document.title + " Decode from iframe, later removed, fails (img not loaded)");

</script>