public void EvalulateNumberTest()
{
//EvalulateNumber(int value)
//Act
CalculatorModel OperationalModel = new CalculatorModel(OutPut);
//Arrange : For Flag to be default and Content to be "0"
OperationalModel.EvalulateNumber(5);
//Act
var expected = "5";
//Assert
Assert.AreEqual(expected, OperationalModel.ResultLabel.Content.ToString());
//Arrange : For Flag to be default and Content to have a value other than "0"
OperationalModel.EvalulateNumber(6);
//Act
expected = "56";
//Assert
Assert.AreEqual(expected, OperationalModel.ResultLabel.Content.ToString());
//Arrange: for when the default is set but Reset is true
OperationalModel.Reset = true;
OperationalModel.EvalulateNumber(9);
//Act
expected = "9";
//Assert
Assert.AreEqual(expected, OperationalModel.ResultLabel.Content.ToString());
//Arrange : different flag
OperationalModel.Operation = CalculatorModel.Flag.Add;
OperationalModel.EvalulateNumber(2);
//Act
expected = "2";
//Assert
Assert.AreEqual(expected, OperationalModel.ResultLabel.Content.ToString());
}