Xamarin UI Test. Take control's background col

Question

I am new to xamarin UI tests. I need to get color of UIView. As i understand i need to use Invoke method, because there no another tests way to do this. I try to take color by something like

var color = app.Query(c => c.Marked("someText").Invoke("BackgroundColor"));

or

var color = app.Query(c => c.Marked("someText").Invoke("BackgroundColor").Invoke("CGColor").Value());

but it returns me object with stars-only string "******" or crash in case of "Value" using. Please, tell me what I am doing wrong?

Also I'm getting "*****" for any wrong request, for example

var result = app.Query(x => x.Marked("Mark").Invoke("TextColorAAAAAAA"));
result = {object[1]}    [0] "*****"

so xamarin don't know command "Background".

Update

Looks like all that time xamarin was waiting for command "backgroundColor", from small letter. But that's not resolving problem. Now it returns empty object, no even default values...

[0] {
    red => [

    ],
    alpha => [

    ],
    type => [

    ],
    blue => [

    ],
    green => [

    ]
}

Answer 1

Try to use the private field styleString of UIColor like this:

var color = app.Query(c => c.Marked("someText").Invoke("backgroundColor").Invoke("styleString"))[0];

You should get a string rgb value: rgb(1,2,3)

With that, you can just parse the string to get R, G and B elements out of it.