public void WhenRollingD20_ThenResultReflectsCorrectTypeAndCorrectResult()
{
var expectedResult = 20;
var expectedDiceType = DiceType.d20;
_rng.Setup(i => i.Next(It.IsAny <int>(), It.IsAny <int>())).Returns(expectedResult);
var result = _diceRoller.D20();
Assert.AreEqual(expectedDiceType, result.DiceType);
Assert.AreEqual(expectedResult, result.Result);
}