http/tests/workers/terminate-during-sync-operation.html

<html>
<head>
<script src='resources/worker-util.js'></script>
<script>
var workersStarted;
var workersClosed;

var testNumber = -1;
var syncOperationTests = new Array('openDatabaseSync', 'requestFileSystemSync', 'fileSyncOperations');

// 30 workers seemed to cause the crash to happen frequently.
var workers = new Array(30);

function startNextTest()
{
    testNumber++;
    log('Waiting for all workers to exit.');
    if (testNumber >= syncOperationTests.length) {
        waitUntilWorkerThreadsExit(done)
        return;
    }
    waitUntilWorkerThreadsExit(startWorkers)
}

function startWorkers()
{
    log('Testing interrupting: ' +  syncOperationTests[testNumber]);
    log('Starting workers.');
    workersStarted = 0;
    workersClosed = 0;
    for (var i = 0; i < workers.length; ++i) {
        workers[i] = new Worker('resources/sync-operations.js?arg=' + i)
        workers[i].onmessage = onWorkerStarted;
    }
}

// Do our best to try to interrupt the database open
// call by waiting for the worker to start and then
// telling it to do the open database call (and
// then terminate the worker).
function onWorkerStarted()
{
    workersStarted++;
    log('Started worker count: ' + workersStarted);
    if (workersStarted < workers.length)
        return;

    log('Running operation.');
    for (var i = 0; i < workers.length; ++i)
        workers[i].postMessage(syncOperationTests[testNumber]);

    setTimeout('closeWorker()', 0);
}

function closeWorker()
{
    workers[workersClosed].terminate();
    workersClosed++;
    log('Closed worker count: ' + workersClosed);
    if (workersClosed < workers.length)
        setTimeout('closeWorker()', 3);
    else
        startNextTest();
}

function runTest()
{
    log('Starting test run.');
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }
    startNextTest();
}
</script>
</head>
<body onload='runTest()'>
<p>Test that terminating the worker while it is performing synchronous file or database operations will not cause any crashes, asserts, etc.</p>
<div id='result'>
</div>
</body>
</html>