xmlDiff helper method for Jasmine, using prettydiff

xmlDiff.js

util.xmlDiff = function (orig, diff) {
    expect(typeof orig).toEqual('string');
    expect(typeof diff).toEqual('string');
    var source = prettydiff({
        source: orig,
        lang: 'markup',
        mode: 'minify'
    });
    var changedDoc = prettydiff({
        source: diff,
        lang: 'markup',
        mode: 'minify'
    });

    expect(source[0]).not.toMatch(/^Error:/);
    expect(changedDoc[0]).not.toMatch(/^Error:/);

    var pretty = prettydiff({
        source: source[0],
        diff: changedDoc[0],
        lang: 'markup',
        context: 1
    });
    var results = $(pretty[0]);
    var diffInfo = results.eq(11).find('p:nth-child(4)');
    var diffCount = parseInt(diffInfo.contents().eq(2).text());
    var diffLines = parseInt(diffInfo.contents().eq(4).text());
    expect(diffCount).toBe(0);
    expect(diffLines).toBe(0);
    if (diffCount > 0) {
        console.log(diffInfo.text());
        var left = results.eq(13).find('div.diff-left > ol.data').find('li.empty, li.replace, li.delete, li.insert');
        var right = results.eq(13).find('div.diff-right > ol.data').find('li.empty, li.replace, li.delete, li.insert');
        expect(left.length).toEqual(right.length);
        left.each(function (i) {
            var l = $(this);
            var r = right.eq(i);
            expect(r.text().trim()).toEqual(l.text().trim());
        });
    }
};