public async Task Can_Increase_GenerationNumber_Every_Chromosomes_Stored()
{
var population = new Population();
Assert.Null(population.Chromosomes);
Assert.Equal(-1, population.GenerationNumber);
population.Chromosomes = MockObject.CreateChromosomes(10).ToImmutableHashSet();
Assert.Equal(0, population.GenerationNumber);
IGeneticAlgorithm genetic = new GeneticAlgorithm(MockObject.CreateOperationStrategy());
var number = population.GenerationNumber;
var result = await genetic.EvolveUntil(population, s => s.EvolutionCount >= 5);
Assert.Equal(result.EvolutionCount, population.GenerationNumber - number);
}
public async Task Can_Evolve_Until_Termination_Condition_Fulfilled_Or_Canceled_Without_Throwing()
{
const int delay = 100;
var strategy = MockObject.CreateOperationStrategy();
var population = MockObject.CreatePopulation();
population.Chromosomes = MockObject.CreateChromosomes(10).ToImmutableHashSet();
IGeneticAlgorithm genetic = new GeneticAlgorithm(strategy);
using (var cts = new CancellationTokenSource())
{
var preEvolutionStates = genetic.EvolutionStates;
var evolution = genetic.TryEvolveUntil(population, _ => false, cts.Token);
await Task.Delay(delay);
cts.Cancel();
var(result, succeed) = await evolution;
Assert.False(succeed);
var afterEvolutionStates = genetic.EvolutionStates;
Assert.True(afterEvolutionStates.EvolutionCount > preEvolutionStates.EvolutionCount);
Assert.True(afterEvolutionStates.EvolutionTime > preEvolutionStates.EvolutionTime);
var differentTime = afterEvolutionStates.EvolutionTime - preEvolutionStates.EvolutionTime;
Assert.True(differentTime >= MockObject.CreateProximateAccuracyTimeSpan(delay));
Assert.Equal(afterEvolutionStates.EvolutionCount - preEvolutionStates.EvolutionCount,
result.EvolutionCount);
Assert.Equal(afterEvolutionStates.EvolutionTime - preEvolutionStates.EvolutionTime,
result.EvolutionTime);
}
using (var cts = new CancellationTokenSource())
{
const int time = 50;
var evolution = genetic.TryEvolveUntil(
population,
s => s.EvolutionTime >= TimeSpan.FromMilliseconds(time),
cts.Token);
await Task.Delay(delay);
var(result, succeed) = await evolution;
Assert.True(succeed);
Assert.True(result.EvolutionTime >= MockObject.CreateProximateAccuracyTimeSpan(time));
}
}
public async Task Can_Evolve_Until_Cancelled_Whithout_Throwing()
{
const int time = 100;
var population = MockObject.CreatePopulation();
population.Chromosomes = MockObject.CreateChromosomes(10).ToImmutableHashSet();
IGeneticAlgorithm genetic = new Core.GeneticAlgorithm(MockObject.CreateOperationStrategy());
using (var cts = new CancellationTokenSource())
{
var evolution = genetic.TryEvolve(population, cts.Token);
await Task.Delay(time);
cts.Cancel();
var result = await evolution;
Assert.True(result.EvolutionTime >= MockObject.CreateProximateAccuracyTimeSpan(time));
Assert.True(cts.IsCancellationRequested);
}
}
public async Task Can_Evolve_Until_Cancelled()
{
const int time = 100;
var population = MockObject.CreatePopulation();
population.Chromosomes = MockObject.CreateChromosomes(10).ToImmutableHashSet();
IGeneticAlgorithm genetic = new Core.GeneticAlgorithm(MockObject.CreateOperationStrategy());
using (var cts = new CancellationTokenSource())
{
var evolution = genetic.Evolve(population, cts.Token);
await Task.Delay(time);
cts.Cancel();
await Assert.ThrowsAnyAsync <OperationCanceledException>(() => evolution);
Assert.True(cts.IsCancellationRequested);
}
}
public async Task Can_Evolve_Until_Termination_Condition_Fulfilled()
{
var strategy = MockObject.CreateOperationStrategy();
var population = MockObject.CreatePopulation();
population.Chromosomes = MockObject.CreateChromosomes(10).ToImmutableHashSet();
IGeneticAlgorithm genetic = new GeneticAlgorithm(strategy);
{
const int count = 10;
var preEvolutionCount = genetic.EvolutionStates.EvolutionCount;
var result = await genetic.EvolveUntil(population, s => s.EvolutionCount >= count);
Assert.True(genetic.EvolutionStates.EvolutionCount > preEvolutionCount);
Assert.True(result.EvolutionCount >= count);
}
{
var time = TimeSpan.FromMilliseconds(100);
var preEvolutionTime = genetic.EvolutionStates.EvolutionTime;
var result = await genetic.EvolveUntil(population, s => s.EvolutionTime >= time);
Assert.True(genetic.EvolutionStates.EvolutionTime > preEvolutionTime);
Assert.True(result.EvolutionTime >= time);
}
}
