animateMotion-calcMode-discrete-keyPoints.html

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This WPT test may be referenced by the following Test IDs:
- /svg/animations/animateMotion-calcMode-discrete-keyPoints.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Test animateMotion with calcMode="discrete", path, keyPoints, and keyTimes</title>

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

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

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

<svg xmlns="http://www.w3.org/2000/svg">

  <rect width="10" height="10">

    <animateMotion id="anim" calcMode="discrete" dur="4s" fill="freeze"

      path="M0,0 L200,0"

      keyPoints="1;0.25;0"

      keyTimes="0;0.5;1" />

  </rect>

</svg>

<script>

// Path goes from (0,0) to (200,0), length=200.

// keyPoints="1;0.25;0" maps to path fractions: end, quarter, start.

// keyTimes="0;0.5;1" with dur=4s:

//   keyframe 0 (t=0..2s): keyPoint=1 => path fraction 1.0 => (200,0)

//   keyframe 1 (t=2..4s): keyPoint=0.25 => path fraction 0.25 => (50,0)

//   at t=4s (fill=freeze): keyPoint=0 => path fraction 0.0 => (0,0)

//

// With discrete calcMode, the value jumps at keyTime boundaries.

// keyPoints differ from keyTimes to verify keyPoints are actually applied.

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

const rect = document.querySelector("rect");

function sample1() {

    // First keyframe, path fraction 1.0 => (200, 0)

    assert_equals(rect.getCTM().e, 200, "x (end of path)");

    assert_equals(rect.getCTM().f, 0, "y (end of path)");

function sample2() {

    // Second keyframe, path fraction 0.25 => (50, 0)

    assert_equals(rect.getCTM().e, 50, "x (quarter of path)");

    assert_equals(rect.getCTM().f, 0, "y (quarter of path)");

function sample3() {

    // Freeze at last keyframe, path fraction 0 => (0, 0)

    assert_equals(rect.getCTM().e, 0, "x (start of path)");

    assert_equals(rect.getCTM().f, 0, "y (start of path)");

smil_async_test((t) => {

    const expectedValues = [

        ["anim", 0.0,   sample1],

        ["anim", 1.0,   sample1],

        ["anim", 2.0,   sample2],

        ["anim", 3.0,   sample2],

        ["anim", 4.0,   sample3],

];

    runAnimationTest(t, expectedValues);

});

</script>

</html>