@Test
public void testMin() {
CategoryColumn categoryColumn = CategoryColumn.create("US States");
categoryColumn.addAll(TestDataUtil.usStates());
assertTrue("Alabama".equals(categoryColumn.bottom(5).get(0)));
}
@Test
public void testMax() {
CategoryColumn categoryColumn = CategoryColumn.create("US States");
categoryColumn.addAll(TestDataUtil.usStates());
assertTrue("Wyoming".equals(categoryColumn.top(5).get(0)));
}