public void Test_Backstage_Update_QualityZero_ReturnOk()
{
// Arrange
Backstage backstage = new Backstage("Backstage", -1, 30);
//Act
backstage.Update();
//Assert
Assert.Equal(0, backstage.Quality);
Assert.Equal(-2, backstage.SellIn);
}
public void Test_Backstage_Update_Increse3_ReturnOk()
{
// Arrange
Backstage backstage = new Backstage("Backstage", 2, 0);
//Act
backstage.Update();
//Assert
Assert.Equal(3, backstage.Quality);
Assert.Equal(1, backstage.SellIn);
}