audio-element-should-not-exceed-its-set-height.html

<!DOCTYPE html>
<html>
<title>Test that an audio element does not stretch past its set height.</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../media-controls.js"></script>
<style>
video, audio {
  height: 2px;
}
</style>
<audio controls preload=none src="../content/test.oga"></audio>
<!-- Also test for a video acting as an audio element. -->
<video controls preload=none src="../content/test.oga"></video>
<script>
async_test(t => {
  const audio = document.querySelector('audio');
  const video = document.querySelector('video');

  video.addEventListener("loadedmetadata", t.step_func_done(() => {
    assert_equals(getComputedStyle(panelElement(audio)).height, "2px", "audio tag panel height");
    assert_equals(getComputedStyle(panelElement(video)).height, "2px", "video tag panel height");
  }), { once: true });

  video.load();
});
</script>
</html>

chromium/third_party/blink/web_tests/media/controls/audio-element-should-not-exceed-its-set-height.html