@Test
public void testSampleIndex_ImplicitRandom_NonRepeating_BetweenRuns() {

    IntSeries s1 = Sampler.sampleIndex(5, 100);
    IntSeries s2 = Sampler.sampleIndex(5, 100);
    boolean hasDifferences = false;
    for (int i = 0; i < 5; i++) {
        if (s1.getInt(i) != s2.getInt(i)) {
            hasDifferences = true;
            break;
        }
    }
    assertTrue(hasDifferences);
}