public static GildedRoseTestHost AfterEachDayUpdate(this GildedRoseTestHost source, int numberOfDays)
 {
     for (int i = 0; i < numberOfDays; i++)
     {
         source.GildedRose.UpdateQuality();
     }
     return(source);
 }
 public static GildedRoseTestHost ItemSellInShouldBe(this GildedRoseTestHost source, int expected)
 {
     source.FirstItem.SellIn.Should().Be(expected);
     return(source);
 }
 public static GildedRoseTestHost ItemQualityShouldBe(this GildedRoseTestHost source, int expected)
 {
     source.FirstItem.Quality.Should().Be(expected);
     return(source);
 }