public void CloudinaryImag_WithFaceDetection()
{
var transformation = new Transformation(240, 240)
{
Gravity = Gravity.Face,
Crop = CropMode.Crop
};
string url = Url.CloudinaryImage("face", transformation).ToString();
Assert.AreEqual("http://res.cloudinary.com/test/image/upload/w_240,h_240,c_crop,g_face/face.jpg", url);
}