// answer (from R) is [15.57,41.2] (41.2,60.66] (60.66,77.29] (77.29,100.1] (100.1,155.3]
public void testEvaluateRealData() throws Exception {
Literal classes = ff.literal(5);
PropertyName exp = ff.property("jenks71");
Function func = ff.function("Jenks", exp, classes);
Object value = func.evaluate(jenksCollection);
assertNotNull(value);
assertTrue(value instanceof RangedClassifier);
RangedClassifier ranged = (RangedClassifier) value;
assertEquals(5, ranged.getSize());
assertEquals("15.57..41.2", ranged.getTitle(0));