The BrowserMob Blog

var selenium = browserMob.openBrowser();
 
selenium.setTimeout(2500);
 
function ignoreIfSafeTimeout(e, step, minObjects, acceptableThreshold) {
    if (e.message.indexOf("Timed out after ") == -1) {
        throw e; // this isn't a timeout, so throw it
    }
 
    var objects = step.getObjects();
    var objectCount = objects.size();
 
    if (objectCount < minObjects) {
        throw "Expected at least " + minObjects + 
              " objects but only saw " + objectCount;
    }
 
    var errors = 0;
    for (var i = 0; i &lt; objectCount; i++) {
        var object = objects.get(i);
        var code = object.getStatusCode();
        if (code < 200 || code >= 400) {
            errors++;
        }
    }
 
    var errorRatio = errors / objectCount;
    if (errorRatio > acceptableThreshold) {
        throw "Expected no more than " + acceptableThreshold + 
              " error ratio but saw " + errorRatio;
    }
}
 
browserMob.beginTransaction();
 
var step1 = browserMob.beginStep("Home Page");
try {
    selenium.open("http://marketwatch.com");
} catch (e) {
    ignoreIfSafeTimeout(e, step1, 130, 0.1);
}
 
browserMob.endStep();
 
browserMob.endTransaction();