fast/workers/worker-close.html

<body>
<p>Test WorkerContext.close functionality. Should print a series of PASS messages, followed with DONE.</p>
<div id=result></div>
<script>
function log(message)
{
    document.getElementById("result").innerHTML += message + "<br>";
}

if (window.testRunner)
{
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
}

var worker = new Worker('resources/worker-close.js');
var timeout = 0;

worker.postMessage("typeofClose");
worker.onmessage = testTypeofClose;

function testTypeofClose(evt)
{
    if (evt.data == "typeof close: function")
        log("PASS: " + evt.data);
    else
        log("FAIL: " + evt.data);
    worker.onmessage = testMessageAfterClose;
    worker.postMessage("ping");
}

function testMessageAfterClose(evt) {
    if (evt.data == "pong")
        log("PASS: received message before close");
    else
        log("FAIL: received unknown response: " + evt.data);

    // Tell the worker to close, then send a followup message. This message should not be delivered,
    // since that would require JS to invoke the onmessage handler, which does not happen after the JS
    // fragment with 'close()' in it exits. So, the 'ping' should not come back as 'pong'.
    worker.postMessage("close");
    worker.postMessage("ping");
    worker.onmessage = function(evt) {
        if (evt.data != "pong") {
            log("PASS: Received message posted right after close() was invoked: " + evt.data);
            timeout = setTimeout(testErrorAfterClose, 1000);
        } else {
            log("FAIL: Received a message originated from a handler in the worker after the JS fragment with close() exited" + evt.data);
            done();
        }
    };
}

function testErrorAfterClose()
{
    log("PASS: no messages arrive to worker after JS fragment with close() exits");
    // Test that errors are delivered after close.
    worker = new Worker('resources/worker-close.js');
    worker.postMessage("closeWithError");
    worker.onerror = function(event) {
        log("PASS: Error arrived after close: " + event.message);
        testPendingEvents();
        return false;
    }
}

function testPendingEvents()
{
    // Now test that workers do not deliver pending events
    worker = new Worker('resources/worker-close.js');
    worker.postMessage("closeWithPendingEvents");
    worker.onmessage = function(evt) {
        log("FAIL: pending events should not fire:" + evt.data);
        done();
    }
    worker.onerror = function(evt) {
        log("FAIL: pending events should not fire:" + evt.message);
        done();
    }
    timeout = setTimeout(testTerminateAfterClose, 500);
}

function testTerminateAfterClose()
{
    log("PASS: close() did not dispatch pending events");
    worker = new Worker('resources/worker-close.js');
    worker.postMessage("close");
    worker.onmessage = function(evt) {
        log("PASS: Received message after worker closed: " + evt.data);
        // Give worker a chance to close first, then terminate it.
        timeout = setTimeout(function() {
            worker.terminate();
            done();
        }, 500);
    };
}

function done() {
    if (timeout)
        clearTimeout(timeout);
    log("DONE");
    if (window.testRunner)
        testRunner.notifyDone();
}
</script>
</body>
</html>