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path: root/browser/modules/test/browser/formValidation/browser_validation_iframe.js
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/**
 * Make sure that the form validation error message shows even if the form is in an iframe.
 */
add_task(async function test_iframe() {
  let uri =
    "data:text/html;charset=utf-8," +
    escape(
      "<iframe src=\"data:text/html,<iframe name='t'></iframe><form target='t' action='data:text/html,'><input required id='i'><input id='s' type='submit'></form>\" height=\"600\"></iframe>"
    );

  var gInvalidFormPopup =
    gBrowser.selectedBrowser.browsingContext.currentWindowGlobal
      .getActor("FormValidation")
      ._getAndMaybeCreatePanel(document);
  ok(
    gInvalidFormPopup,
    "The browser should have a popup to show when a form is invalid"
  );

  await BrowserTestUtils.withNewTab(uri, async function checkTab(browser) {
    let popupShownPromise = BrowserTestUtils.waitForEvent(
      gInvalidFormPopup,
      "popupshown"
    );

    await SpecialPowers.spawn(browser, [], async function () {
      content.document
        .getElementsByTagName("iframe")[0]
        .contentDocument.getElementById("s")
        .click();
    });
    await popupShownPromise;

    let anchorBottom = await SpecialPowers.spawn(
      browser,
      [],
      async function () {
        let childdoc =
          content.document.getElementsByTagName("iframe")[0].contentDocument;
        Assert.equal(
          childdoc.activeElement,
          childdoc.getElementById("i"),
          "First invalid element should be focused"
        );
        return (
          childdoc.defaultView.mozInnerScreenY +
          childdoc.getElementById("i").getBoundingClientRect().bottom
        );
      }
    );

    function isWithinHalfPixel(a, b) {
      return Math.abs(a - b) <= 0.5;
    }

    is(
      isWithinHalfPixel(gInvalidFormPopup.screenY),
      isWithinHalfPixel(anchorBottom),
      "popup top"
    );

    ok(
      gInvalidFormPopup.state == "showing" || gInvalidFormPopup.state == "open",
      "The invalid form popup should be shown"
    );
  });
});