public void MoveForwardOneDay(int startingSellIn, int startingQuality, int resultSellIn, int resultQuality)
{
BackStagePasses backstagepasses = new BackStagePasses()
{
SellIn = startingSellIn, Quality = startingQuality
};
backstagepasses.MoveForwardOneDay();
int expectedQuality = backstagepasses.Quality;
int sellin = backstagepasses.SellIn;
Assert.That(sellin, Is.EqualTo(resultSellIn));
Assert.That(expectedQuality, Is.EqualTo(resultQuality));
}
