public void UpdateQuality_SellByDateHasNotPassed_ReducesValues()
{
// Arrange
var item = new Item {
Name = "+5 Dexterity Vest", SellIn = 10, Quality = 20
};
var standardRetailItem = new StandardRetailItem(item);
// Act
standardRetailItem.UpdateQuality();
//Assert
Assert.Equal(9, item.SellIn);
Assert.Equal(19, item.Quality);
}
public void UpdateQuality_SellByDatePassed_QualityDegradesTwiceAsFast()
{
// Arrange
var item = new Item {
Name = "+5 Dexterity Vest", SellIn = 0, Quality = 20
};
var standardRetailItem = new StandardRetailItem(item);
// Act
standardRetailItem.UpdateQuality();
//Assert
Assert.Equal(-1, item.SellIn);
Assert.Equal(18, item.Quality);
}
public void UpdateQuality_ItemSellinAboveZero_ReducesQualityTwiceAsFast()
{
var item1 = new Item {
Name = "+5 Dexterity Vest", SellIn = 10, Quality = 20
};
var item2 = new Item {
Name = "+5 Dexterity Vest", SellIn = 10, Quality = 20
};
var standardRetailItem = new StandardRetailItem(item1);
var conjuredRetailItem = new ConjuredRetailItem(item2);
standardRetailItem.UpdateQuality();
conjuredRetailItem.UpdateQuality();
var diff1 = 20 - item1.Quality;
var diff2 = 20 - item2.Quality;
var rateComparison = diff2 / diff1;
Assert.Equal(item1.SellIn, item2.SellIn);
Assert.Equal(2, rateComparison);
}