Asynchronous JavaScript Testing with QUnit

22 December, 2008. It was a Monday.

I’m implementing a feature that does some stuff when an IFRAME is finished loading. Due to the inherent asynchronous nature of this functionality, it was hard to test. I was trying to use QUnit, but having issues, until I found this post:

http://markdotmeyer.blogspot.com/2008/07/javascript-unit-testing-with-qunit.html

The summary? Check out the stop() and start() functions.

Now, I can write my test like this:

test("addWindow should remove the loadingStauts div after the iframe is loaded", function() {
    
    var loadingStatus = $("<div></div>").attr("id", "loadingDiv");
    
    var stack = $("<div></div>")
                    .attr("id", "stackDiv")
                    .appendTo("#stack")
                    .windowStack()
                    .withLoadingStatus(loadingStatus);

    stack[0].addWindow("Blank_for_iframe_testing.htm", "");

    stop();

    setTimeout(function() {
        equals(loadingStatus[0].parentNode, null, "loadingStatus DIV should be removed after the iframe is loaded");
        start();
    }, 500);
});

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