*/
public void testIndexOf() {
TimeSeries s1 = new TimeSeries("S1");
TimeSeries s2 = new TimeSeries("S2");
TimeSeriesCollection dataset = new TimeSeriesCollection();
assertEquals(-1, dataset.indexOf(s1));
assertEquals(-1, dataset.indexOf(s2));
dataset.addSeries(s1);
assertEquals(0, dataset.indexOf(s1));
assertEquals(-1, dataset.indexOf(s2));