test_focus_scrollable_fieldset.html

Enable keyboard shortcuts

<!doctype html>

<title>Test for bug 1351248</title>

<script src="/tests/SimpleTest/SimpleTest.js"></script>

<script src="/tests/SimpleTest/EventUtils.js"></script>

<style>

  fieldset {

    overflow: auto;

    height: 1em;

    width: 1em;

</style>

<input type="text" id="start">

<fieldset>

  <input type="text">

  <input type="text">

  <input type="text">

  <input type="text">

  <input type="text">

  <input type="text">

</fieldset>

<input type="text" id="end">

<script>

  SimpleTest.waitForExplicitFinish();

  SimpleTest.waitForFocus(async function() {

    // Enable Full Keyboard Access emulation on Mac.

    if (navigator.platform.indexOf("Mac") === 0) {

      await SpecialPowers.pushPrefEnv({"set": [["accessibility.tabfocus", 7]]});

    const start = document.getElementById("start");

    start.focus();

    const end = document.getElementById("end");

    is(document.activeElement, start, "Focus moved sanely");

    let lastActiveElement = start;

    let stack = [start];

    do {

      synthesizeKey("KEY_Tab");

      isnot(document.activeElement, lastActiveElement, "Focus should've moved once per tab keypress");

      lastActiveElement = document.activeElement;

      stack.push(lastActiveElement);

    } while (document.activeElement != end)

    is(stack.length, document.querySelectorAll("input").length + 1, "Fieldset should be focusable");

    do {

      let previous = stack.pop();

      is(document.activeElement, previous, "Focus should've moved backwards as expected");

      synthesizeKey("KEY_Tab", {shiftKey: true});

    } while (stack.length);

    SimpleTest.finish();

});

</script>