chromium/third_party/blink/web_tests/external/wpt/svg/animations/scripted/animateMotion-animated-line.svg

<svg class="reftest-wait" onload="load()" xmlns="http://www.w3.org/2000/svg"
  xmlns:html="http://www.w3.org/1999/xhtml">
  <html:script src="/common/reftest-wait.js"/>
  <html:script src="/common/rendering-utils.js"/>
  <html:link rel="match" href="../../embedded/reference/green-rect-100x100.svg"/>
  <line id="line" x2="500" display="none">
    <set attributeName="x2" to="0" begin="3s" fill="freeze"/>
  </line>
  <rect width="100" height="100" fill="yellow">
    <animateMotion begin="0s" dur="4s" fill="freeze">
      <mpath href="#line"/>
    </animateMotion>
    <set attributeName="fill" to="green" begin="4s" fill="freeze"/>
  </rect>
  <script>
    function load() {
      waitForAtLeastOneFrame().then(() => {
        document.documentElement.setCurrentTime(4);
        waitForAtLeastOneFrame().then(takeScreenshot);
      });
    }
  </script>
</svg>