/**
* A check for a null task duration.
*/
public void testGetStartValue3() {
TaskSeriesCollection c = new TaskSeriesCollection();
TaskSeries s = new TaskSeries("Series 1");
s.add(new Task("Task with null duration", null));
c.add(s);
Number millis = c.getStartValue("Series 1", "Task with null duration");
assertTrue(millis == null);
}