@Test
public void testInvalidSeasonalEstimatesLength() {

    expectedEx.expect(IllegalArgumentException.class);
    expectedEx.expectMessage(String.format("Invalid: initSeasonalEstimates size (%d) must equal frequency (%d)",
            INSUFFICIENT_SEASONAL_ESTIMATES.length, DUMMY_FREQUENCY));
    subject.validate(INSUFFICIENT_SEASONAL_ESTIMATES, DUMMY_FREQUENCY, HoltWintersSeasonalityType.MULTIPLICATIVE);
}