revert-val-008.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-cascade/revert-val-008.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSS Cascade: 'revert' in final keyframe of web animation</title>

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

<link rel="help" href="https://crbug.com/1065387">

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

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

<h1 id=h1></h1>

<h1 id=ref></h1>

<script>

  test(function() {

    let expected_lower = parseInt(getComputedStyle(ref).marginTop);

    let expected_upper = expected_lower * 2;

    h1.animate([

      { marginTop: `${expected_lower * 4}px` },

      { marginTop: `${expected_lower * 3}px` },

      { marginTop: `${expected_lower * 2}px` },

      { marginTop: 'revert' },

    ], {

      duration: 4000,

      delay: -3500,

    }).pause();

    let actual = parseInt(getComputedStyle(h1).marginTop);

    // This test assumes that the UA style sheet sets a non-0px value on

    // <h1> elements:

    assert_not_equals(expected_lower, 0);

    assert_not_equals(expected_upper, 0);

    assert_between_exclusive(actual, expected_lower, expected_upper);

  }, 'The revert keyword works in the final frame of a web animation');

</script>