public void ResolveTie_SplitsTheResultsApproximatelyByExpectation()
{
// Arrange
var tieBreaker = new RandomisingTwoWayTieBreaker(0.3);
// Act
var leftResultCount = 0;
var rightResultCount = 0;
for (var i = 0; i < 10000; i++)
{
switch (tieBreaker.ResolveTie())
{
case TieResult.Left:
leftResultCount++;
break;
case TieResult.Right:
rightResultCount++;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
// Assert
leftResultCount.Should().BeLessThan(4000).And.BeGreaterThan(2000);
rightResultCount.Should().BeLessThan(8000).And.BeGreaterThan(6000);
}
public void GivenLeftProbability_CreatesATieBreakerWithThatLeftProbability()
{
// Act
const double leftProbability = 0.643;
var tieBreaker = new RandomisingTwoWayTieBreaker(leftProbability);
// Assert
tieBreaker.LeftProbability.Should().Be(leftProbability);
tieBreaker.RightProbability.Should().Be(1 - leftProbability);
}