Mypal68/browser/base/content/test/general/browser_bug633691.js

/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

add_task(async function test() {
  const URL = "data:text/html,<iframe width='700' height='700'></iframe>";
  await BrowserTestUtils.withNewTab({ gBrowser, url: URL }, async function(
    browser
  ) {
    await ContentTask.spawn(
      browser,
      {
        is_element_hidden_: is_element_hidden.toSource(),
        is_hidden_: is_hidden.toSource(),
      },
      async function({ is_element_hidden_, is_hidden_ }) {
        let loadError = ContentTaskUtils.waitForEvent(
          this,
          "AboutNetErrorLoad",
          false,
          null,
          true
        );
        let iframe = content.document.querySelector("iframe");
        iframe.src = "https://expired.example.com/";

        await loadError;

        /* eslint-disable no-eval */
        let is_hidden = eval(`(() => ${is_hidden_})()`);
        let is_element_hidden = eval(`(() => ${is_element_hidden_})()`);
        /* eslint-enable no-eval */
        let doc = content.document.getElementsByTagName("iframe")[0]
          .contentDocument;
        let aP = doc.getElementById("badCertAdvancedPanel");
        ok(aP, "Advanced content should exist");
        void is_hidden; // Quiet eslint warnings (actual use under is_element_hidden)
        is_element_hidden(
          aP,
          "Advanced content should not be visible by default"
        );
      }
    );
  });
});