public void PushButton(string buttonValue)
        {
            var calculatorWindow = new WpfCalculatorWindow(_application);

            calculatorWindow.PushButton(buttonValue);
        }
        public void PressKey(string keyPressed)
        {
            var calculatorWindow = new WpfCalculatorWindow(_application);

            calculatorWindow.TypeKey(keyPressed);
        }
        public static string DisplayedValue(Application calculator)
        {
            var calculatorWindow = new WpfCalculatorWindow(calculator);

            return(calculatorWindow.DisplayedValue());
        }