public void GetDieAverage_shouldWork()
{
var diceService = new DiceService();
diceService.GetDieAverage(6).Should().Be(4);
diceService.GetDieAverage(8).Should().Be(5);
diceService.GetDieAverage(10).Should().Be(6);
diceService.GetDieAverage(12).Should().Be(7);
// maybe you're playing with some bizarre house rules
diceService.GetDieAverage(7).Should().Be(4);
}