public void UpdateQuality_WhenSellByDateHasPassed_QualityDegradesTwiceAsFast()
{
// Arrange
var program = new Program {
Items = InventoryStore.GetItems()
};
var itemsWithQualityDegradingTwiceAsFast = program.Items
.Where(item => !item.Name.Equals("Aged Bried"))
.Where(item => !item.Name.Equals("Sulfuras, Hand of Ragnaros"));
var pickedItem = itemsWithQualityDegradingTwiceAsFast.First();
// Until sell by date is reached
while (pickedItem.SellIn >= 0)
{
program.UpdateQuality();
}
var previousQuality = pickedItem.Quality;
// Act
program.UpdateQuality();
// Assert
Assert.Equal(pickedItem.Quality, previousQuality - 2);
}
public void UpdateQuality_WhenItemIsConjuredManaCake_QualityDegradesTwiceAsFast()
{
// Arrange
var program = new Program {
Items = InventoryStore.GetItems()
};
var conjuredManaCake = GetItem(program.Items, "Conjured Mana Cake");
var quality = conjuredManaCake.Quality;
// Act
program.UpdateQuality();
// Assert
Assert.Equal(quality - 2, conjuredManaCake.Quality);
}
public void UpdateQuality_WhenItemIsAgedBrie_QualityIncreasesTheOlderItGets()
{
// Arrange
var program = new Program {
Items = InventoryStore.GetItems()
};
var agedBrie = GetItem(program.Items, "Aged Brie");
var agedBrieQuality = agedBrie.Quality;
// Act
program.UpdateQuality();
// Assert
++agedBrieQuality;
Assert.Equal(agedBrie.Quality, agedBrieQuality);
}
public void UpdateQuality_WhenItemIsSulfuras_SellInIsAlwaysZeroAndQualityIsAlwaysEighty()
{
// Arrange
var program = new Program {
Items = InventoryStore.GetItems()
};
// Act
program.UpdateQuality();
// Assert
var sulfuras = program.Items.FirstOrDefault(item => item.Name.Equals("Sulfuras, Hand of Ragnaros"));
Assert.NotNull(sulfuras);
Assert.Equal(sulfuras.Quality, 80);
Assert.Equal(sulfuras.SellIn, 0);
}
public void UpdateQuality_WhenQualityIsUpdated_QualityIsNeverNegative()
{
// Arrange
var program = new Program {
Items = InventoryStore.GetItems()
};
// Act
for (int quality = 0; quality < 51; quality++)
{
program.UpdateQuality();
}
// Assert
Assert.All(program.Items, item =>
{
Assert.True(item.Quality >= 0, "Quality should be 0 but it was negative");
});
}
public void UpdateQuality_WhenItemIsBackstagePasses_QualityIncreasesUntilSellInDate()
{
var program = new Program {
Items = InventoryStore.GetItems()
};
var backstagePass = GetItem(program.Items, "Backstage passes to a TAFKAL80ETC concert");
var quality = backstagePass.Quality;
var sellIn = backstagePass.SellIn;
while (sellIn > -1)
{
program.UpdateQuality();
if (sellIn > 10)
{
quality += 1;
}
else if (sellIn > 5)
{
quality += 2;
}
else if (sellIn > 0)
{
quality += 3;
}
else
{
quality = 0;
}
if (quality > 50)
{
quality = 50;
}
Assert.Equal(quality, backstagePass.Quality);
sellIn -= 1;
}
}
public void UpdateQuality_WhenQualityIsUpdated_QualityNeverExceedsFifty()
{
// Arrange
var program = new Program {
Items = InventoryStore.GetItems()
};
// Act
for (int quality = 0; quality < 51; quality++)
{
program.UpdateQuality();
}
// Assert
Assert.All(program.Items, item =>
{
if (!item.Name.Equals("Sulfuras, Hand of Ragnaros"))
{
Assert.True(item.Quality <= 50, $"Quality from item {item.Name} should be up to 50 only, but it was {item.Quality}");
}
});
}