@Test
public void parameters() {

	final BoltzmannSelector<DoubleGene, Double> selector = new BoltzmannSelector<>(2);
	// Create population with zero fitness.
	final ISeq<Phenotype<DoubleGene, Double>> population =
		TestUtils.newDoublePopulation(20, 0, 0);
	// Must select without exception.
	selector.probabilities(population, 10);
}