chromium/third_party/blink/web_tests/external/wpt/svg/animations/single-values-animation.html

<!doctype html>
<html>
<meta charset="utf-8">
<title>This tests values animation with just a single entry</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/SVGAnimationTestCase-testharness.js"></script>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Tiny//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-tiny.dtd">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">

<!-- an1: Change width immediately to 100 at 2s -->
<rect width="10" height="100" fill="green">
    <animate id="an1" attributeType="XML" attributeName="width" fill="freeze" values="100" begin="2s"/>
</rect>

</svg>

<script>
var rootSVGElement = document.querySelector("svg");
var epsilon = 1.0;

// Setup animation test
function sample1() {
    assert_approx_equals(rect.width.animVal.value, 10, epsilon);
    assert_equals(rect.width.baseVal.value, 10);
}

function sample2() {
    assert_approx_equals(rect.width.animVal.value, 100, epsilon);
    assert_equals(rect.width.baseVal.value, 10);
}

smil_async_test((t) => {
    rect = rootSVGElement.ownerDocument.getElementsByTagName("rect")[0];

    const expectedValues = [
        // [animationId, time, sampleCallback]
        ["an1", 0.0,  sample1],
        ["an1", 2.0,  sample2],
        ["an1", 4.0,  sample2],
        ["an1", 60.0, sample2]
    ];

    runAnimationTest(t, expectedValues);
});

window.animationStartsImmediately = true;

</script>