<!DOCTYPE html>
<div id="container"></div>
<script src="../../../../fast/workers/resources/worker-util.js"></script>
<script src="../../../../resources/testharness.js"></script>
<script src="../../../../resources/testharnessreport.js"></script>
<script>

var test = async_test(function() {
    assert_not_equals('undefined', typeof window.internals);
    var worker = new CompositorWorker('resources/proxy-idle.js');
    worker.onmessage = function() {
        var docLayer = JSON.parse(window.internals.layerTreeAsText(document));
        assert_equals(1, docLayer.children.length);
        assert_equals(1, docLayer.children[0].children.length);

        worker.terminate();

        // Give some time for the worker to terminate.
        waitUntilWorkerThreadsExit(function() {
            docLayer = JSON.parse(window.internals.layerTreeAsText(document));
            assert_equals(1, docLayer.children.length);
            assert_equals('undefined', typeof docLayer.children[0].children);
            test.done();
        });
    }

    var proxy = new CompositorProxy(document.getElementById('container'), ['opacity']);
    worker.postMessage(proxy);

    var container = document.getElementById('container');
    var docLayer = JSON.parse(window.internals.layerTreeAsText(document));
    assert_equals(1, docLayer.children.length);
    assert_equals(1, docLayer.children[0].children.length);
    proxy.disconnect();
}, "This test checks that an element's compositor proxy cannot be mutated after disconnect().");

</script>