CSSTransition-not-canceling.tentative.html

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-transitions/CSSTransition-not-canceling.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Not canceling a CSS transition</title>

<link rel="help" href="https://drafts.csswg.org/css-transitions/#starting">

<!-- TODO: Add a more specific link for this once it is specified. -->

<link rel="help" href="https://drafts.csswg.org/css-transitions-2/#csstransition">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="support/helper.js"></script>

<div id="log"></div>

<script>

'use strict';

const runDisplayNoneTransitionTest = displayTransitionStyle => {

    promise_test(async t => {

      const div = addDiv(t, { style: 'margin-left: 0px' });

      getComputedStyle(div).marginLeft;

      div.style.transition = 'margin-left 100s';

      div.style.marginLeft = '1000px';

      const transition = div.getAnimations()[0];

      await transition.ready;

      await waitForFrame();

      assert_not_equals(getComputedStyle(div).marginLeft, '1000px',

                        'transform style is animated before setting "display: none"');

      div.style.transition = `${div.style.transition}, ${displayTransitionStyle}`;

      div.style.display = 'none';

      assert_not_equals(getComputedStyle(div).marginLeft, '1000px',

                        'transform style is animated after setting "display: none"');

    }, `Setting "display: none" with "display" set to transition using "${displayTransitionStyle}" does not cancel running transitions`);

};

runDisplayNoneTransitionTest('display 100s allow-discrete');

runDisplayNoneTransitionTest('display 100s, all allow-discrete 100s');

</script>