<!DOCTYPE html>
<meta charset="utf-8"/>
<title>MathML tabindex attribute</title>
<meta name="timeout" content="long">
<link rel="help" href="https://w3c.github.io/mathml-core/#attributes-common-to-html-and-mathml-elements">
<meta assert="flag" content="interact">
<meta assert="assert" content="Check the sequential focus navigation order for MathML">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<div id="log"></div>
<a href="#link">tabindex(html,href)</a>
<math>
  <mtext id="text1">tabindex(omitted)</mtext>
  <mtext id="text2" tabindex="">tabindex(empty)</mtext>
  <mtext id="text3" tabindex="a">tabindex(a)</mtext>
  <mtext id="text4" tabindex="-1">tabindex(-1)</mtext>
  <mtext id="text5" tabindex="0">tabindex(0)</mtext>
  <mtext id="text6" href="#link">tabindex(href)</mtext>
  <mtext id="text7" tabindex="3">tabindex(3)</mtext>
  <mtext id="text8" tabindex="2">tabindex(2)</mtext>
  <mtext id="text9" tabindex="2">tabindex(2)</mtext>
  <mtext id="text10" tabindex="2">tabindex(2)</mtext>
  <mtext id="text11" tabindex="1">tabindex(1)</mtext>
</math>
<script>

var i = 0,
    expectation = ["text11", "text8", "text9", "text10", "text7", "text5"],
    results = [],
    t = async_test("Elements with different tabindex must be focused sequentially when pressing 'Tab' keys");

setup(function () {
  document.body.focus();
});

document.querySelector("a").addEventListener("focus", function (evt) {
    // Links are tab-navigable on that platform.
    expectation.push("text6");
    // TAB = '\ue004'
    test_driver.send_keys(document.body, "\ue004");
}, true);

document.querySelector("math").addEventListener("focus", function (evt) {
  results.push(evt.target.id);
  i++;
  if (i >= expectation.length) {
    t.step(function () {
      assert_array_equals(results, expectation);
    });
    t.done();
  } else {
    t.step(function () {
      // TAB = '\ue004'
      test_driver.send_keys(document.body, "\ue004");
    });
  }
}, true);

document.addEventListener("keydown", function (evt) {
  t.step(function () {
    assert_equals(evt.keyCode, 9, "Please press 'Tab' key.");
  });
}, true);

t.step(function () {
  // TAB = '\ue004'
  test_driver.send_keys(document.body, "\ue004");
});
</script>
