public void DefaultReroll_ShouldBeNone()
{
var rollBuilder = RollBuilder.WithDie(Die.D6)
.Targeting(Target.ValueAndAbove(4)) as RollBuilder;
rollBuilder.RerollBehaviour.GetType().Should().Be <RerollNone>();
}
public void DefaultRollModifier_ShouldBeNoModifier()
{
var rollBuilder = RollBuilder.WithDie(Die.D6)
.Targeting(Target.ValueAndAbove(4)) as RollBuilder;
rollBuilder.RollModifier.GetType().Should().Be <NoModifier>();
}
public void GivenD6_NoReroll_NoModifier(int valueAndAboveTarget)
{
var roll = RollBuilder.WithDie(Die.D6)
.Targeting(Target.ValueAndAbove(valueAndAboveTarget))
.Build();
// Calc - SuccessfulSideCount / Sides
var expectedProbability = (7 - valueAndAboveTarget) / 6m;
CheckProbability(roll, expectedProbability);
}
public void GivenD6_NoReroll_NoModifier(int numberToGenerate, int expected)
{
var roll = RollBuilder.WithDie(Die.D6)
.WithNumbers(new ForcedNumberGenerator(numberToGenerate))
.Targeting(Target.ValueAndAbove(3))
.Build();
var result = roll.Simulate();
_output.WriteLine(result.ToString());
result.Final.Should().Be(expected);
}
public void GivenD6_RerollFailures_NoModifier(int targeting, int initialRoll, int reroll, bool expectedReroll, int expectedFinal, bool expectedSuccess)
{
var roll = RollBuilder.WithDie(Die.D6)
.WithNumbers(new ForcedNumberGenerator(initialRoll, reroll))
.Targeting(Target.ValueAndAbove(targeting))
.WithReroll(Reroll.Failures)
.Build();
var result = roll.Simulate();
_output.WriteLine(result.ToString());
ValidateRollResult(result, initialRoll, reroll, expectedReroll, expectedFinal, expectedSuccess);
}
public void GivenD6_RerollOnes_WhenOneIsSuccess()
{
var die = Die.D6;
var roll = RollBuilder.WithDie(die)
.Targeting(Target.ValueAndAbove(1))
.WithReroll(Reroll.Ones)
.Build();
// Calc - If the base probability is already 100%, reroll should not increase it further as you should not be rerolling.
var expectedProbability = 1m;
CheckProbability(roll, expectedProbability);
}
public void GivenD6_RerollOnes(int valueAndAboveTarget)
{
var die = Die.D6;
var roll = RollBuilder.WithDie(die)
.Targeting(Target.ValueAndAbove(valueAndAboveTarget))
.WithReroll(Reroll.Ones)
.Build();
// Calc - (SuccessfulSideCount / Sides) + ((1 / Sides) * (SuccessfulSideCount / Sides))
var decimalSides = (decimal)die.TotalSides;
var successfulSideCount = die.TotalSides + 1 - valueAndAboveTarget;
var expectedProbability = successfulSideCount / decimalSides + 1 / decimalSides * (successfulSideCount / decimalSides);
CheckProbability(roll, expectedProbability);
}
public void GivenD6_RerollOnes_ModifierDecreaseByOne(int valueAndAboveTarget)
{
var modifier = -1;
var die = Die.D6;
var roll = RollBuilder.WithDie(die)
.Targeting(Target.ValueAndAbove(valueAndAboveTarget))
.WithReroll(Reroll.Ones)
.WithModifier(modifier)
.Build();
// Calc - See CalcRerollWithModifier
var successfulSideCount = die.TotalSides + 1 - valueAndAboveTarget;
var expectedProbability = CalcProbabilityForRerollWithModifier(die.TotalSides, successfulSideCount, 1, modifier);
CheckProbability(roll, expectedProbability);
}
public void GivenD6_NoReroll_ModifierDecreaseByOne(int valueAndAboveTarget)
{
var modifier = -1;
var die = Die.D6;
var roll = RollBuilder.WithDie(die)
.Targeting(Target.ValueAndAbove(valueAndAboveTarget))
.WithReroll(Reroll.None)
.WithModifier(-1)
.Build();
// Calc - ((SuccessfulSideCount + ModifierAmount) / Sides)
var decimalSides = (decimal)die.TotalSides;
var successfulSideCount = die.TotalSides + 1 - valueAndAboveTarget;
var expectedProbability = (successfulSideCount + modifier) / decimalSides;
CheckProbability(roll, expectedProbability);
}