struct Button {
    width  int
    height int
}

enum Color {
    red
    blue
    yellow
}

struct ColoredButton {
    Button
    color Color
}

fn change_color(cb ColoredButton, color Color) ColoredButton {
    return ColoredButton{
        ...cb
        color: color
    }
}

fn test_struct_update_with_embed_field() {
    red_button := ColoredButton{Button{100, 100}, .red}
    blue_button := change_color(red_button, .blue)

    println(red_button)
    println(blue_button)

    assert blue_button == ColoredButton{Button{100, 100}, .blue}
}