TimeSeriesCollection c1 = new TimeSeriesCollection();
TimeSeries s1 = new TimeSeries("Series 1");
TimeSeries s2 = new TimeSeries("Series 2");
TimeSeries s3 = new TimeSeries("Series 3");
TimeSeries s4 = new TimeSeries("Series 4");
c1.addSeries(s1);
c1.addSeries(s2);
c1.addSeries(s3);
c1.addSeries(s4);
c1.removeSeries(2);
assertTrue(c1.getSeries(2).equals(s4));