public void RouletteWheelSampler_GetEntity_NoSizes()
{
MockGeneticAlgorithm algorithm = new MockGeneticAlgorithm
{
GeneticEntitySeed = new MockEntity(),
SelectionOperator = new MockSelectionOperator(),
FitnessEvaluator = new MockFitnessEvaluator(),
PopulationSeed = new MockPopulation()
};
List <WheelSlice> slices = new List <WheelSlice>();
MockEntity entity1 = new MockEntity();
entity1.Initialize(algorithm);
MockEntity entity2 = new MockEntity();
entity2.Initialize(algorithm);
MockEntity entity3 = new MockEntity();
entity3.Initialize(algorithm);
MockEntity entity4 = new MockEntity();
entity4.Initialize(algorithm);
slices.Add(new WheelSlice(entity1, 0));
slices.Add(new WheelSlice(entity2, 0));
slices.Add(new WheelSlice(entity3, 0));
slices.Add(new WheelSlice(entity4, 0));
TestRandomUtil randomUtil = new TestRandomUtil();
RandomNumberService.Instance = randomUtil;
randomUtil.RandomValue = 2;
GeneticEntity sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Equal(4, randomUtil.MaxValuePassed);
Assert.Same(entity3, sampledEntity);
}
public void RouletteWheelSampler_GetEntity()
{
MockGeneticAlgorithm algorithm = new MockGeneticAlgorithm
{
GeneticEntitySeed = new MockEntity(),
SelectionOperator = new MockSelectionOperator(),
FitnessEvaluator = new MockFitnessEvaluator(),
PopulationSeed = new MockPopulation()
};
List <WheelSlice> slices = new List <WheelSlice>();
MockEntity entity1 = new MockEntity();
entity1.Initialize(algorithm);
MockEntity entity2 = new MockEntity();
entity2.Initialize(algorithm);
MockEntity entity3 = new MockEntity();
entity3.Initialize(algorithm);
MockEntity entity4 = new MockEntity();
entity4.Initialize(algorithm);
slices.Add(new WheelSlice(entity1, 4));
slices.Add(new WheelSlice(entity2, 2));
slices.Add(new WheelSlice(entity3, 1));
slices.Add(new WheelSlice(entity4, 3));
TestRandomUtil randomUtil = new TestRandomUtil();
RandomNumberService.Instance = randomUtil;
randomUtil.Ratio = 0;
GeneticEntity sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity1, sampledEntity);
randomUtil.Ratio = .39999;
sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity1, sampledEntity);
randomUtil.Ratio = .4;
sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity2, sampledEntity);
randomUtil.Ratio = .59999;
sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity2, sampledEntity);
randomUtil.Ratio = .6;
sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity3, sampledEntity);
randomUtil.Ratio = .69999;
sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity3, sampledEntity);
randomUtil.Ratio = .7;
sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity4, sampledEntity);
randomUtil.Ratio = 1;
sampledEntity = RouletteWheelSampler.GetEntity(slices);
Assert.Same(entity4, sampledEntity);
}
public void RouletteWheelSampler_GetEntity_EmptyCollection()
{
Assert.Throws <ArgumentException>(() => RouletteWheelSampler.GetEntity(new List <WheelSlice>()));
}
public void RouletteWheelSampler_GetEntity_NullWheelSlice()
{
Assert.Throws <ArgumentException>(() => RouletteWheelSampler.GetEntity(new WheelSlice[] { null }.ToList()));
}
public void RouletteWheelSampler_GetEntity_NullCollection()
{
Assert.Throws <ArgumentNullException>(() => RouletteWheelSampler.GetEntity(null));
}
