public void UpdateQuality_WhenSellInDaysIsBelowZero_DecreasesQualityToZero()
{
// Arrange
var item = new Item {
SellIn = -1, Quality = 5
};
var backstagePassStrategy = new BackstagePassStrategy();
// Act
backstagePassStrategy.UpdateQuality(item);
// Assert
var expectedQuality = 0;
Assert.Equal(expectedQuality, item.Quality);
}
public void UpdateQuality_WhenSellInDaysIsHigherThanZero_DecreasesSellInByOne()
{
// Arrange
var item = new Item {
SellIn = 5
};
var backstagePassStrategy = new BackstagePassStrategy();
// Act
backstagePassStrategy.UpdateQuality(item);
// Assert
var expectedSellInDays = 4;
Assert.Equal(expectedSellInDays, item.SellIn);
}
public void UpdateQuality_WhenSellInDaysIs_IncreasesQualityBy(int initialSellIn, int qualityShouldIncreaseBy)
{
// Arrange
const int initialQuality = 5;
var item = new Item {
SellIn = initialSellIn, Quality = initialQuality
};
var backstagePassStrategy = new BackstagePassStrategy();
// Act
backstagePassStrategy.UpdateQuality(item);
// Assert
var expectedQuality = initialQuality + qualityShouldIncreaseBy;
Assert.Equal(expectedQuality, item.Quality);
}
