browser_test_srcdoc_in_parent_process.js

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"use strict";

add_task(async function srcdoc_blocked_in_parent_process() {

  const iframe = document.createElement("iframe");

  iframe.srcdoc = "<script>throw new Error();</script>";

  document.documentElement.append(iframe);

  const iframe2 = document.createElement("iframe");

  document.documentElement.append(iframe2);

  const load2Promise = BrowserTestUtils.waitForEvent(iframe2, "load", true);

  iframe2.src = "chrome://browser/content/aboutRobots.xhtml";

  registerCleanupFunction(() => {

    iframe.remove();

    iframe2.remove();

});

  // We don't get load or error events for the srcdoc iframe,

  // so we assume it would finish loading before iframe2.

  await load2Promise;

is(

    iframe.contentDocument.documentURI,

    "about:blank",

    "srcdoc frame should still be at about:blank"

);

is(

    iframe.contentDocument.documentElement.innerHTML,

    "<head></head><body></body>",

    "srcdoc markup should not have been parsed"

);

});