public void testRemoveRow() {
DefaultCategoryDataset d = new DefaultCategoryDataset();
d.addValue(1.0, "R1", "C1");
d.addValue(2.0, "R2", "C2");
assertEquals(2, d.getRowCount());
d.removeRow("R2");
assertEquals(1, d.getRowCount());
boolean pass = false;
try {
d.removeRow("XXX");