* A test for bug report 697153.
*/
public void test697153() {
final TaskSeries s1 = new TaskSeries("S1");
s1.add(new Task("Task 1", new SimpleTimePeriod(new Date(), new Date())));
s1.add(new Task("Task 2", new SimpleTimePeriod(new Date(), new Date())));
s1.add(new Task("Task 3", new SimpleTimePeriod(new Date(), new Date())));
final TaskSeries s2 = new TaskSeries("S2");
s2.add(new Task("Task 2", new SimpleTimePeriod(new Date(), new Date())));
s2.add(new Task("Task 3", new SimpleTimePeriod(new Date(), new Date())));
s2.add(new Task("Task 4", new SimpleTimePeriod(new Date(), new Date())));
final TaskSeriesCollection tsc = new TaskSeriesCollection();
tsc.add(s1);
tsc.add(s2);