public void Age_WhenCalled_ShouldDecreaseSellInByOne(int sellIn)
{
// Arrange
var item = new BackstagePass("", sellIn, 0);
// Act
item.Age();
// Assert
item.SellIn.ShouldBe(sellIn - 1);
}
public void Age_WhenQualityIsFifty_ShouldNotIncreaseQuality()
{
// Arrange
var item = new BackstagePass("", 4, 50);
// Act
item.Age();
// Assert
item.Quality.ShouldBe(50);
}
public void Age_WhenSellInIsZeroOrNegative_ShouldSetDegradationRateAndQualityToZero(int sellIn)
{
// Arrange
var item = new BackstagePass("", sellIn, 10);
// Act
item.Age();
// Assert
item.Quality.ShouldBe(0);
item.DegradationRate.ShouldBe(0);
}
public void Age_WhenSellInIsBetweenOneAndFive_ShouldIncreaseQualityByThree(int sellIn)
{
// Arrange
var initialQuality = 10;
var item = new BackstagePass("", sellIn, initialQuality);
// Act
item.Age();
// Assert
item.Quality.ShouldBe(initialQuality + 3);
item.DegradationRate.ShouldBe(-3);
}
public void Age_WhenSellInIsAboveTen_ShouldIncreaseQualityByOne(int sellIn)
{
// Arrange
var initialQuality = 10;
var item = new BackstagePass("", sellIn, initialQuality);
// Act
item.Age();
// Assert
item.Quality.ShouldBe(initialQuality + 1);
item.DegradationRate.ShouldBe(-1);
}