chromium/third_party/blink/web_tests/external/wpt/html/rendering/replaced-elements/embedded-content/audio-controls-intrinsic-size.html

<!doctype html>
<title>Audio intrinsic size doesn't depend on its max size</title>
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1683979">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div style="display: inline-block">
  <audio controls style="max-width: 99%" id="test"></audio>
</div>
<script>
let audio = document.getElementById("test");

function computeSize() {
  return audio.getBoundingClientRect().width;
}

let size = computeSize();
async_test(function(t) {
  requestAnimationFrame(t.step_func(function() {
    assert_equals(computeSize(), size, "Shouldn't have changed size");
    requestAnimationFrame(t.step_func_done(function() {
      assert_equals(computeSize(), size, "Shouldn't have changed size");
    }));
  }));
});
</script>