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chromium/third_party/blink/web_tests/external/wpt/svg/animations/animateMotion-keyPoints-001.html 

<!doctype html>
<title>'calcMode' paced and 'keyPoints' on &lt;animateMotion> with 'path'</title>
<link rel="help" href="https://svgwg.org/specs/animations/#AnimateMotionElement">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/SVGAnimationTestCase-testharness.js"></script>
<svg>
  <rect width="100" height="100" fill="red"/>
  <rect id="target" transform="translate(100, -50)" width="100" height="100" fill="green">
    <animateMotion dur="5s" keyPoints="1;0" keyTimes="0;1" path="M-200,50h250"/>
  </rect>
</svg>
<script>
const rootSVGElement = document.querySelector('svg');

function sample(expectedX) {
  const target = document.getElementById('target');
  const targetCTM = target.getCTM();
  assert_approx_equals(targetCTM.e, expectedX, 1e-3, 'x position');
  assert_equals(targetCTM.f, 0, 'y position');
  const restOfCTM = ['a', 'b', 'c', 'd'].map(p => targetCTM[p]);
  assert_array_equals(restOfCTM, [1, 0, 0, 1], 'rest of CTM');
}

smil_async_test(t => {
  runAnimationTest(t, [
    // [animationId, time, sampleCallback]
    ['anim', 1, sample.bind(this, 100)],
    ['anim', 2, sample.bind(this, 50)],
    ['anim', 3, sample.bind(this, 0)],
  ]);
});
window.animationStartsImmediately = true;
</script>