public void testRemoveSeries() {
VectorSeries s1 = new VectorSeries("S1");
VectorSeries s2 = new VectorSeries("S2");
VectorSeriesCollection vsc = new VectorSeriesCollection();
vsc.addSeries(s1);
vsc.addSeries(s2);
assertEquals(2, vsc.getSeriesCount());
boolean b = vsc.removeSeries(s1);
assertTrue(b);
assertEquals(1, vsc.getSeriesCount());
assertEquals("S2", vsc.getSeriesKey(0));