@Override
    public void setRampDownPercent(long rampDownPercent) {
        Validate.isTrue((rampDownPercent >= 0) && (rampDownPercent < 100), "rampDownPercent must be a value between 0 and 99");
        this.rampDownPercent = rampDownPercent;
    }
@Test(expected = IllegalArgumentException.class)
    public void testSetRampDownPercent_exceeds99() {
        sampler.setRampDownPercent(100);
    }