chromium/third_party/blink/web_tests/animations/prefixed/animation-inherit-initial-unprefixed.html

<!DOCTYPE html>
<style>
#base {
    animation-name: anim;
    animation-duration: 5s;
    animation-timing-function: linear;
    animation-delay: 2s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
    animation-play-state: running;
}

#inherit {
    animation-name: inherit;
    animation-duration: inherit;
    animation-timing-function: inherit;
    animation-delay: inherit;
    animation-iteration-count: inherit;
    animation-direction: inherit;
    animation-play-state: inherit;
}

#initial {
    animation-name: initial;
    animation-duration: initial;
    animation-timing-function: initial;
    animation-delay: initial;
    animation-iteration-count: initial;
    animation-direction: initial;
    animation-play-state: initial;
}

</style>
<div style="width:500px;height:500px" id="base">
    <div id="inherit"></div>
    <div id="initial"></div>
</div>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
test(() => {
  var testContainer = document.createElement("div");
  document.body.appendChild(testContainer);

  e = document.getElementById('inherit');
  computedStyle = window.getComputedStyle(e, null);

  assert_equals(computedStyle.animationName, "anim");
  assert_equals(computedStyle.webkitAnimationName, "anim");

  assert_equals(computedStyle.animationDuration, "5s");
  assert_equals(computedStyle.webkitAnimationDuration, "5s");

  assert_equals(computedStyle.animationTimingFunction, "linear");
  assert_equals(computedStyle.webkitAnimationTimingFunction, "linear");

  assert_equals(computedStyle.animationDelay, "2s");
  assert_equals(computedStyle.webkitAnimationDelay, "2s");

  assert_equals(computedStyle.animationIterationCount, "infinite");
  assert_equals(computedStyle.webkitAnimationIterationCount, "infinite");

  assert_equals(computedStyle.animationDirection, "alternate");
  assert_equals(computedStyle.webkitAnimationDirection, "alternate");

  assert_equals(computedStyle.animationPlayState, "running");
  assert_equals(computedStyle.webkitAnimationPlayState, "running");

  e = document.getElementById('initial');
  computedStyle = window.getComputedStyle(e, null);

  assert_equals(computedStyle.animationName, "none");
  assert_equals(computedStyle.webkitAnimationName, "none");

  assert_equals(computedStyle.animationDuration, "0s");
  assert_equals(computedStyle.webkitAnimationDuration, "0s");

  assert_equals(computedStyle.animationTimingFunction, "ease");
  assert_equals(computedStyle.webkitAnimationTimingFunction, "ease");

  assert_equals(computedStyle.animationDelay, "0s");
  assert_equals(computedStyle.webkitAnimationDelay, "0s");

  assert_equals(computedStyle.animationIterationCount, "1");
  assert_equals(computedStyle.webkitAnimationIterationCount, "1");

  assert_equals(computedStyle.animationDirection, "normal");
  assert_equals(computedStyle.webkitAnimationDirection, "normal");

  assert_equals(computedStyle.animationPlayState, "running");
  assert_equals(computedStyle.webkitAnimationPlayState, "running");

  document.body.removeChild(testContainer);
}, "Test that inherit and initial works on unprefixed animations");
</script>