public void TestImageTagAutoDpr()
{
var transform = new Transformation().Width(100).Height(101).Crop("crop").Dpr("auto");
var result = m_api.UrlImgUp.Transform(transform).BuildImageTag("test").ToString();
Assert.True(transform.HiDpi);
Assert.AreEqual("<img width=\"100\" height=\"101\" class=\"cld-hidpi\" data-src=\"http://res.cloudinary.com/testcloud/image/upload/c_crop,dpr_auto,h_101,w_100/test\"/>", result);
}