public void QualityShouldNeverBeOver50(int quality)
{
// Arrange
InventoryItem systemUnderTest = new FreshItem(1, quality);
// Act
systemUnderTest.MatureOvernight();
// Assert
systemUnderTest.Quality.ShouldBe(50);
}
public void SellInShouldNotChangeAtMinValue()
{
// Arrange
InventoryItem systemUnderTest = new FreshItem(int.MinValue, 1);
// Act
systemUnderTest.MatureOvernight();
// Assert
systemUnderTest.SellIn.ShouldBe(int.MinValue);
}
public void ShouldDecreaseQualityBy2BeforeSellby(int sellIn, int quality)
{
// Arrange
InventoryItem systemUnderTest = new FreshItem(sellIn, quality);
// Act
systemUnderTest.MatureOvernight();
// Assert
systemUnderTest.SellIn.ShouldBe(sellIn - 1);
systemUnderTest.Quality.ShouldBe(quality - 2);
}
public void ShouldDecreaseQualityAtDoubleSpeedAtNegative(int positiveSellIn)
{
// Arrange
InventoryItem systemUnderTestPositive = new FreshItem(positiveSellIn, 10);
InventoryItem systemUnderTestNegative = new FreshItem(-positiveSellIn, 10);
// Act
systemUnderTestPositive.MatureOvernight();
systemUnderTestNegative.MatureOvernight();
// Assert
int PositiveDecrease = 10 - systemUnderTestPositive.Quality;
int NegativeDecrease = 10 - systemUnderTestNegative.Quality;
NegativeDecrease.ShouldBe(PositiveDecrease * 2);
}