define(
    [
        "jquery", "underscore",
        "js/utils/handle_iframe_binding"
    ],
function ($, _, IframeBinding) {

    describe("IframeBinding", function () {
        var doc = document.implementation.createHTMLDocument("New Document");
        var iframe_html = '<iframe src="http://www.youtube.com/embed/NHd27UvY-lw" frameborder="0" height="350" width="618"></iframe>';
        iframe_html += '<iframe src="http://www.youtube.com/embed/NHd27UvY-lw?allowFullScreen=false" frameborder="0" height="350" width="618"></iframe>';
        iframe_html += '<embed type="application/x-shockwave-flash" src="http://www.youtube.com/embed/NHd27UvY-lw" height="315" width="560">';
        doc.body.innerHTML = iframe_html;

        var verify_no_modification = function (src) {
            iframe_html = '<iframe width="618" height="350" src="' + src + '" frameborder="0" allowfullscreen></iframe>';
            doc.body.innerHTML = iframe_html;

            IframeBinding.iframeBinding(doc);

            expect($(doc).find("iframe")[0].src).toEqual(src);
        };

        it("modifies src url of DOM iframe and embed elements when iframeBinding function is executed", function () {
            expect($(doc).find("iframe")[0].src).toEqual("http://www.youtube.com/embed/NHd27UvY-lw");
            expect($(doc).find("iframe")[1].src).toEqual("http://www.youtube.com/embed/NHd27UvY-lw?allowFullScreen=false");
            expect($(doc).find("embed")[0].hasAttribute("wmode")).toBe(false);

            IframeBinding.iframeBinding(doc);

            //after calling iframeBinding function: src url of iframes should have "wmode=transparent" in its querystring
            //and embed objects should have "wmode='transparent'" as an attribute
            expect($(doc).find("iframe")[0].src).toEqual("http://www.youtube.com/embed/NHd27UvY-lw?wmode=transparent");
            expect($(doc).find("iframe")[1].src).toEqual("http://www.youtube.com/embed/NHd27UvY-lw?wmode=transparent&allowFullScreen=false");
            expect($(doc).find("embed")[0].hasAttribute("wmode")).toBe(true);

            iframe_html = IframeBinding.iframeBindingHtml(iframe_html);

            //after calling iframeBinding function: src url of iframes should have "wmode=transparent" in its querystring
            //and embed objects should have "wmode='transparent'" as an attribute
            expect(iframe_html).toContain('<iframe src="http://www.youtube.com/embed/NHd27UvY-lw?wmode=transparent"');
            expect(iframe_html).toContain('<embed wmode="transparent" type="application/x-shockwave-flash" src="http://www.youtube.com/embed/NHd27UvY-lw"');
        });

        it("does not modify src url of DOM iframe if it is empty", function () {
            verify_no_modification("");
        });

        it("does nothing on tinymce iframe", function () {
            verify_no_modification("javascript:");
        });
    });
});
