@Test
public void testAround() {

    TsPeriod pos = new TsPeriod(TsFrequency.Monthly, 2000, 3);
    SeasonalOutlier so1 = new SeasonalOutlier(pos.firstday());
    // 
    for (int i = -6; i < 6; ++i) {
        DataBlock data = new DataBlock(12);
        so1.data(pos.minus(i), data);
    }
}