<!DOCTYPE html>
<script src="../../resources/js-test-pre.js"></script>
<body>
    <script>
        var image = new Image;

        description('Test HTMLImageElement::decode() does not leak the pending promises after resolving or rejecting them.');
        jsTestIsAsync = true;

        function decodeMultiple(image, multipleCount) {
            var promises = [];
            for (index = 0; index < multipleCount; ++index)
                promises.push(image.decode());
            return promises;
        }

        function resolveSingle(image, singleCount) {
            if (!singleCount)
                return Promise.resolve();
            return image.decode().then(() => {
                return resolveSingle(image, singleCount - 1);
            });
        }

        function rejectSingle(image, singleCount) {
            if (!singleCount)
                return Promise.reject();
            return image.decode().catch(() => {
                return rejectSingle(image, singleCount - 1);
            });
        }

        function decodeBitmapImage(image, multipleCount, singleCount) {
            debug("Decoding a bitmap image - promises will be resolved:");
            image.src = "resources/red-400x400.png";
            return Promise.all(decodeMultiple(image, multipleCount)).then(() => {
                return resolveSingle(image, singleCount);
            });
        }

        function decodeSVGImage(image, multipleCount, singleCount) {
            debug("Decoding a SVG image - promises will be resolved:");
            image.src = "resources/green-100x100.svg";
            return Promise.all(decodeMultiple(image, multipleCount)).then(() => {
                return resolveSingle(image, singleCount);
            });
        }

        function decodeBrokenImage(image, multipleCount, singleCount) {
            debug("Decoding a broken image - promises will be rejected:");
            image.src = "";
            return Promise.all(decodeMultiple(image, multipleCount)).catch(() => {
                return rejectSingle(image, singleCount);
            });
        }

        (function() {
            decodeBitmapImage(image, 10, 10).then(() => {
                if (window.internals)
                    shouldBeZero("internals.imagePendingDecodePromisesCountForTesting(image)");
                return decodeSVGImage(image, 10, 10);
            }).then(() => {
                if (window.internals)
                    shouldBeZero("internals.imagePendingDecodePromisesCountForTesting(image)");
                return decodeBrokenImage(image, 10, 10);
            }).catch(() => {
                if (window.internals)
                    shouldBeZero("internals.imagePendingDecodePromisesCountForTesting(image)");
                finishJSTest();
            });
        })();
    </script>
    <script src="../../resources/js-test-post.js"></script>
</body>