@Test
public void stepSize() {

  assertEquals(500, AdaptiveLogisticRegression.stepSize(15000, 2));
  assertEquals(2000, AdaptiveLogisticRegression.stepSize(15000, 2.6));
  assertEquals(5000, AdaptiveLogisticRegression.stepSize(24000, 2.6));
  assertEquals(10000, AdaptiveLogisticRegression.stepSize(15000, 3));
}