LayoutTests/fast/workers/resources/worker-replace-self.js

function log(message)
{
    document.getElementById("result").innerHTML += message + "<br>";
}

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

var worker = createWorker();
worker.postMessage("eval self='PASS'");
worker.postMessage("eval self");
worker.postMessage("eval foo//bar");

worker.onmessage = function(evt) {
    if (!/foo\/\/bar/.test(evt.data))
        log(evt.data.replace(new RegExp("/.*LayoutTests"), "<...>"));
    else {
        log("DONE");
        if (window.layoutTestController)
            layoutTestController.notifyDone();
    }
}