@Test
public void testDiscreteSampler() {
Vector distribution = new DenseVector(new double[] {1, 0, 2, 3, 5, 0});
Sampler sampler = new Sampler(RandomUtils.getRandom(), distribution);
Vector sampledDistribution = distribution.like();
int i = 0;
while (i < 100000) {
int index = sampler.sample();
sampledDistribution.set(index, sampledDistribution.get(index) + 1);
i++;