<!DOCTYPE html>
<html>
<body onload="runTest()">
<script src="../resources/js-test.js"></script>
<script>
description("This test asserts that a CSSAnimation doesn't leak after it was removed declaratively and the document was replaced.");

if (window.internals)
    jsTestIsAsync = true;

function runTest() {
    if (!window.internals)
        return;

    var frame = document.body.appendChild(document.createElement("iframe"));

    frame.addEventListener("load", async () => {
        if (frame.src === 'about:blank')
            return;

        const animationId = "leak-css-animation";

        await (element => {
            return new Promise(resolve => {
                const animation = element.getAnimations()[0];
                if (!animation) {
                    testFailed("The expected CSS animation was not created.");
                    finishJSTest();
                }

                animation.id = animationId;
                if (!internals.animationWithIdExists(animationId)) {
                    testFailed("The expected CSS animation with the provided ID was not initially found.");
                    finishJSTest();
                }

                requestAnimationFrame(() => {
                    element.style.animation = "none";
                    resolve();
                });
            });
        })(frame.contentDocument.querySelector("div"));

        requestAnimationFrame(() => {
            frame.remove();
            frame = null;

            gc();
            let timeout = 0;
            const handle = setInterval(() => {
                if (!internals.animationWithIdExists(animationId)) {
                    clearInterval(handle);
                    testPassed("The CSS animation was destroyed.");
                    finishJSTest();
                    return;
                }
                timeout++;
                if (timeout == 500) {
                    clearInterval(handle);
                    testFailed("The CSS animation was leaked.");
                    finishJSTest();
                    return;
                }
                gc();
            }, 10);
        });
    });

    frame.src = 'resources/css-animation-leak-iframe.html';
}

</script>
</body>
</html>