animate-path-by-animation-additive.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /svg/animations/animate-path-by-animation-additive.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>SVG path 'd' attribute by animation with additive='sum'</title>

<link rel="help" href="https://www.w3.org/TR/SVG2/paths.html#TheDProperty"/>

<link rel="help" href="https://svgwg.org/specs/animations/#AdditionAttributes"/>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/SVGAnimationTestCase-testharness.js"></script>

<script src="support/animated-path-helpers.js"></script>

<svg>

  <path id="path" fill="green" d="M10,10 L30,10 L30,30 L10,30 Z">

    <animate id="animation" attributeName="d"

             by="M20,20 L40,20 L40,40 L20,40 Z"

             additive="sum"

             begin="0s" dur="2s" fill="freeze"/>

  </path>

</svg>

<script>

const rootSVGElement = document.querySelector("svg");

function sample1() {

  // t=0s: base value

  assert_animated_path_equals(path, "M10,10 L30,10 L30,30 L10,30 Z");

function sample2() {

  // t=1s: base + 0.5*by = M20,20 L50,20 L50,50 L20,50 Z

  assert_animated_path_equals(path, "M20,20 L50,20 L50,50 L20,50 Z");

function sample3() {

  // t=2s: base + by = M30,30 L70,30 L70,70 L30,70 Z (frozen)

  assert_animated_path_equals(path, "M30,30 L70,30 L70,70 L30,70 Z");

smil_async_test((t) => {

  const expectedValues = [

    // [animationId, time, sampleCallback]

    ["animation", 0.0,   sample1],

    ["animation", 1.0,   sample2],

    ["animation", 2.0,   sample3],

    ["animation", 2.001, sample3]

];

  runAnimationTest(t, expectedValues);

});

</script>